TM-271A Service manual - The Repeater Builder's Technical ...

VHF FM TRANSCEIVER 

TM-271A/271E 

SERVICE MANUAL 

© 2003-10 PRINTED IN JAPAN 

B51-8663-00 (N) 743 

TM-271A (M2,M4) 

Knob (Volume) 

(K29-9292-03) 

Key top 

(K29-9291-01) 

Microphone 

(T91-0624-05) 

Cabinet 

(A01-2193-01) 

Knob (Encoder) 

(K29-9293-03) 

Panel assy 

(A62-1088-03) 

TM-271A/E (K,M3,E) 

Knob (Volume) 

(K29-9292-03) 

Key top 

(K29-9291-01) 

Microphone 

(T91-0641-05) 

Cabinet 

(A01-2193-01) 

Knob (Encoder) 

(K29-9293-03) 

Panel assy 

(A62-1088-03) 

CONTENTS 

CIRCUIT DESCRIPTION ............................ 2 

SEMICONDUCTOR DATA ........................ 8 

COMPONENTS DESCRIPTION ................ 9 

PARTS LIST ............................................. 10 

EXPLODED VIEW.................................... 17 

PACKING ................................................. 18 

RESETTING THE TRANSCEIVER ........... 19 

ADJUSTMENT ........................................ 20 

TERMINAL FUNCTION ........................... 27 

PC BOARD 

DISPLAY UNIT (X54-3450-10) ............ 28 

TX-RX UNIT (X57-685X-XX)............... 30 

SCHEMATIC DIAGRAM.......................... 34 

BLOCK DIAGRAM ................................... 38 

LEVEL DIAGRAM .................................... 40 

SPECIFICATION ................... BACK COVER


CIRCUIT DESCRIPTION 

Frequency Configuration 

The receiver utilizes double conversion. The first IF is 

49.95MHz and the second IF is 450kHz. The first local oscillator 

signal is supplied from the PLL circuit. 

The PLL circuit in the transmitter generates the necessary 

frequencies. Figure 1 shows the frequencies. 

ANT 

ANT 

SW 

POWER 

AMP 

RF 

AMP 

RF 

AMP 

Fig. 1 

1st 

MIX 

MCF 

49.95MHz 

RX 

TX 

1/2 

CF 450kHz 

IF SYSTEM 

50.4MHz 

X3 

multiply 

TCXO 

PLL/VCO 

AF 

PA 

16.8MHz 

MIC 

AMP 

Frequency configuration 

Receiver System 

The receiver is double conversion superheterodyne. The 

frequency configuration is shown in Figure 1. 

■ Front-end RF Amplifier 

An incoming signal from the antenna is applied to an RF 

amplifier (Q353) after passing through a transmit/receive 

switch circuit (D603, D605 are off) and a band pass filter 

(L357, L356 and varactor diodes : D353, D354). After the 

signal is amplified (Q353), the signal is filtered through a band 

pass filter (L354, L355 and varactor diodes: D351, D352) to 

eliminate unwanted signals before it is passed to the first 

mixer. 

The voltage of these diodes are controlled by tracking the 

CPU (IC101) center frequency of the band pass filter. (See 

Fig. 2.) 

■ First Mixer 

The signal from the RF amplifier is heterodyned with the 

first local oscillator signal from the PLL frequency synthesizer 

circuit at the first mixer (Q352) to create a 49.95MHz first 

intermediate frequency (1st IF) signal. The first IF signal is 

then fed through one pair of monolithic crystal filter (MCF : 

XF351) to further remove spurious signals. 

SP 

MIC 

■ IF Amplifier 

The first IF signal is amplified by Q351, and then goes to 

IC301 (FM processing IC). The signal is heterodyned again 

with a second local oscillator signal within IC301 to create a 

450kHz second IF signal. The second IF signal is then fed 

through a 450kHz ceramic filter (Wide : CF301, Narrow : 

CF302) to further eliminate unwanted signals before it is amplified 

and FM detected in IC301. 

Item 

Rating 

Nominal center frequency 49.95MHz 

Pass bandwidth 

±5.0kHz or more at 3dB 

35dB stop bandwidth ±20.0kHz or less 

Ripple 

1.0dB or less 

Insertion loss 

5.0dB or less 

Guaranteed attenuation 80dB or more at fo±1MHz 

Spurious 

40dB or more 

Terminal impedance 350Ω / 5.5pF 

Table 1 Crystal filter (L71-0620-05) : XF351 

Item 

Rating 

Nominal center frequency 450kHz 

6dB bandwidth 

±6.0kHz or more 

50dB bandwidth 

±12.5kHz or less 

Ripple 

2.0dB or less 


6.0dB or less 

Guaranteed attenuation 35.0dB or more within fo± 100kHz 

Terminal impedance 2.0kΩ 

Table 2 Ceramic filter (L72-0993-05) : CF301 

Item 

Rating 

Nominal center frequency 450kHz 

6dB bandwidth 

±4.5kHz or more 

50dB bandwidth 

±10.0kHz or less 

Ripple 

2.0dB or less 


6.0dB or less 

Guaranteed attenuation 60.0dB or more within fo± 100kHz 

Terminal impedance 2.0kΩ 

Table 3 Ceramic filter (L72-0999-05) : CF302 

CF301 (Wide) 

2 

ANT 

D602 

D603 

D605 

ANT 

SW 

IC203 

DC AMP 

L357,356 

D353,354 

BPF 

TV 

IC161 

D/A 

Q353 

RF AMP 

CPU 

L354,355 

D351,352 

BPF 

Q352 

MIX 

IC402 

1/2 divider 

1st local 

OSC (VCO/PLL) 

Fig. 2 

XF351 

MCF 

Q351 

IF AMP 

X401 

TCXO 

Receiver system 

CF302 (Narrow) 

IC301 

IF system 

Q302 

X3 multiply 

IC161 

D/A CONVERTER 

W/NO 

(EVOL2)



■ Wide/Narrow Switching Circuit 

The Wide port (pin 65) and Narrow port (pin 64) of the CPU 

is used to switch between ceramic filters. When the Wide 

port is high, the ceramic filter SW diodes (D303, D302) cause 

CF301 to turn on to receive a Wide signal. 

When the Narrow port is high, the ceramic filter SW diodes 

(D303, D302) cause CF302 to turn on to receive a Narrow 

signal. (See Fig. 3.) 

IF_IN 

CF301 

(Wide) 

MIX_O 

IC301 

IF System 

R318 

R317 

Wide 

IC101 65pin 

■ Squelch Circuit 

The detection output from the FM IF IC (IC301) passes 

through a noise amplifier (Q301) to detect noise. A voltage is 

applied to the CPU (IC101). The CPU controls squelch according 

to the voltage (SQIN) level. The signal from the RSSI 

pin of IC301 is used for S-meter. The electric field strength of 

the receive signal can be known before the SQIN voltage is 

input to the CPU, and the scan stop speed is improved. 

IC301 

AFO 

IF 

SYSTEM RSSI 

Fig. 5 

Q301 

NOISE AMP 

D301 

DET 

Squelch circuit 

IC101 

SQIN 

RSSI 

CPU 

Narrow 

IC101 64pin 

D303 

R320 

CF302 

(Narrow) 

R319 

D302 

■ AF Signal System 

The detection signal from IF IC (IC301) goes to D/A converter 

(IC161) to adjust the gain and is output to AF filter 

(IC251) for characterizing the signal. The AF signal output 

from IC251 and the DTMF signal, BEEP signal are summed 

and the resulting signal goes to the D/A converter (IC161). 

The AFO output level is adjusted by the D/A converter. The 

signal output from the D/A converter is input to the audio 

power amplifier (IC252). The AF signal from IC252 switches 

between the internal speaker and speaker jack (J1) output. 

(See Fig. 4.) 

IC301 

IF IC 

Fig. 3 

IC161 W/NO IC251 IC161 

(EVOL2) 

D/A 

CONV. 

Wide/Narrow switching circuit 

Fig. 4 

AF 

Filter 

D/A 

CONV. 

AF signal system 

IC252 

AF PA 

SP 

PLL Frequency Synthesizer 

The PLL circuit generates the first local oscillator signal for 

reception and the RF signal for transmission. 

■ PLL 

The frequency step of the PLL circuit is 5 or 6.25kHz. A 

16.8MHz reference oscillator signal is divided at IC401 by a 

fixed counter to produce the 5 or 6.25kHz reference frequency. 

The voltage controlled oscillator (VCO) output signal 

is buffer amplified by Q410, then divided in IC401 by a dualmodule 

programmable counter. The divided signal is compared 

in phase with the 5 or 6.25kHz reference signal in the 

phase comparator in IC401. The output signal from the 

phase comparator is filtered through a low-pass filter and 

passed to the VCO to control the oscillator frequency. (See 

Fig. 6.) 

■ VCO 

The operating frequency is generated by Q406 in transmit 

mode and Q405 in receive mode. The oscillator frequency is 

controlled by applying the VCO control voltage, obtained 

from the phase comparator, to the varactor diodes (D405 and 

D406 in transmit mode and D403 and D404 in receive mode). 

The TX/RX pin is set high in receive mode causing Q408 and 

Q407 to turn Q406 off, and turn Q405 on. The TX/RX pin is 

set low in transmit mode. The outputs from Q405 and Q406 

are amplified by Q410 and sent to the RF amplifiers. (See Fig. 

6.) 

PLL 

DATA 

IC401 : PLL IC 

REF 

OSC 

1/N 5kHz/6.25kHz 

1/M 

Phase 

comparator 

5kHz/6.25kHz 

Q402,403 

Charge 

pump 

LPF 

Q406 

TX VCO 

D405,406 

Q405 

RX VCO 

D403,404 

Q410 

BUFF 

AMP 

Q407,408 

T/R SW 

Q404 

AMP 

RF amplifiers 

TX/RX (CPU) 

16.8MHz 

Fig. 6 

PLL circuit 

3



■ Unlock Circuit 

During reception, the 8RC signal goes high, the 8TC signal 

goes low, and Q34 turns on. Q33 turns on and a voltage is 

applied to 8R. During transmission, the 8RC signal goes low, 

the 8TC signal goes high and Q36 turns on. Q35 turns on and 

a voltage is applied to 8T. 

The CPU monitors the PLL (IC401) LD signal directly. 

When the PLL is unlocked during transmission, the PLL LD 

signal goes low. The CPU detects this signal and makes the 

8TC signal low. When the 8TC signal goes low, no voltage is 

applied to 8T, and no signal is transmitted. (See Fig. 7.) 

8R 

Q33 

SW 

8C 

Q35 

SW 

8T 

Transmitter System 

■ Outline 

The transmitter circuit produces and amplifies the desired 

frequency directly. It FM-modulates the carrier signal by 

means of a varicap diode. 

■ Power Amplifier Circuit 

The transmit output signal from the VCO passes through 

the transmission/reception selection diode (D409) and amplified 

by Q501, Q502 and Q503. The amplified signal goes to 

the final amplifier (Q504) through a low-pass filter. The lowpass 

filter removes unwanted high-frequency harmonic components, 

and the resulting signal is transmitted through the 

antenna terminal. (See Fig. 8.) 

8RC 

Q34 

SW 

Fig. 7 

IC101 

CPU 

Q36 

SW 

LD 

8TC 

IC401 

PLL 

PLL lock 

: LD “H” 

Unlock circuit 

■ APC Circuit 

The automatic transmission power control (APC) circuit 

detects part of a final amplifier output with a diode (D606, 

D607) and applies a voltage to IC501. IC501 compares the 

APC control voltage (PC) generated by the D/A converter 

(IC161) and DC amplifier (IC203) with the detection output 

voltage. IC501 generates the voltage to control Q503 and 

Q504 and stabilizes transmission output. 

The APC circuit is configured to protect over current of 

Q503 and Q504 due to fluctuations of the load at the antenna 

end and to stabilize transmission output at voltage and temperature 

variations. (See Fig. 9.) 

MIC 

IC201 

MIC/IDC 

IC202 

SPLATTER 

FILTER 

IC203 

SUM 

AMP 

IC161 

D/A 

CONVERTER 

IC203 

BUFFER 

MIC KEY 

INPUT 

IC101 

CPU 

IC161 

D/A 

CONVERTER 

ANT 

IC161 

D/A 

CONVERTER 

Q406 

VCO 

Q410 

BUFFER 

IC402 

1/2 

DIVIDER 

Q411 

RF AMP 

Q501 

RF AMP 

Q502 

PRE 

DRIVE AMP 

Q503 

DRIVE 

AMP 

Q504 

FINAL 

AMP 

X401 

Q404 

TCXO 

16.8MHz 

PLL 

RF AMP 

IC401 

Fig. 8 

Transmitter system 

D409 

Q501 

RF 

AMP 

Q502 

PRE 

DRIVE 

AMP 

Q503 

DRIVE 

AMP 

Q504 

FINAL 

AMP 

D602,D603 

D605 

ANT 

SW 

LPF 

ANT 

IC161 

(PC/TVO) 

IC203 

DC 

AMP 

(PC) 

IC501 

APC 

CONTROL 

VR601 

D606 

D607 

POWER 

DET 

4 

Fig. 9 

APC circuit



Control Circuit 

The CPU carries out the following tasks (See Fig. 10.): 

1) Controls the WIDE, NARROW, TX/RX outputs. 

2) Adjusts the AF signal level of the AF filter (IC251) and 

turns the filter select compounder on or off. 

3) Controls the display unit. 

4) Controls the PLL (IC401). 

5) Controls the D/A converter (IC161) and adjusts the volume, 

modulation and transmission power. 

IC101 

CPU 

CK 

DT 

LD 

PLLE 

IC161 

D/A 

converter 

IC401 

PLL 

■ Memory Circuit 

The transceiver has an 64k-bit EEPROM (IC66). The 

EEPROM contains adjustment data. The CPU (IC101) controls 

the EEPROM through three serial data lines. (See Fig. 

11.) 

EEPCK 

IC101 

CPU 

EEPSDT 

EEPWP 

IC66 

EEPROM 

■ Display Circuit 

The CPU (IC101) controls the display LCD and LEDs. 

When power is on, the LCD driver will use the BL line to control 

the LCD illumination and key backlight LEDs. 

The brightness function is controlled by the switch Q12. 

The LCD driver (IC3) and CPU (IC101) communicate through 

the CE, CL, DI, DO lines. (See Fig. 12.) 

IC101 

CPU 

Fig. 10 

Fig. 11 

CE 

CL 

DI 

DO 

BL 

Control circuit 

Memory circuit 

IC3 

LCD 

driver 

COM0~ 

COM3 

SEG0~ 

SEG30 

LCD 

■ Key Matrix Circuit 

The TM-271 front panel has function keys. Each of them 

is connected to a cross point of a matrix of the KI1 to KI3 and 

KSI to KS2 ports of the LCD driver. 

The LCD driver monitors the status of the KI1 to KI3 and 

KS1 to KS2 ports. If the state of one of the ports changes, 

the LCD driver assumes that the key at the matrix point corresponding 

to that port has been pressed. 

IC3 

LCD 

driver 

KI1 

KI2 

KI3 

KS2 

KS1 

FUNC 

REV 

MHz 

(Encoder) 

CALL 

VFO 

MR 

■ Encode 

The DCS and CTCSS signals are output from QT/DQT of 

the CPU (IC101) and summed with the external pin DI line by 

the summing amplifier (IC203) and the resulting signal goes 

to the D/A converter (IC161). The DTMF signal is output from 

DTMF pin of the CPU and summed with a MIC signal by the 

summing amplifier (IC203), and the resulting signal goes to 

the D/A converter (IC161). 

The D/A converter (IC161) adjusts the MOD level and the 

balance between the MOD and CTCSS/DCS levels. Part of a 

CTCSS/DCS signal is summed with MOD and the resulting 

signal goes to the VCOMOD pin of the VCO. This signal is 

applied to a varicap diode in the VCO for direct FM modulation. 

TONE 

IC101 

CPU 

DTMF 

Fig. 13 

QT/DQT 

(CPU1) 

DTMO 

(EVOL15) 

Key matrix circuit 

IC203 

SUM 

AMP 

DI 

IC203 

SUM 

AMP 

TCXO 

MOD 

X401 

TCXO 

IC161 

D/A 

VCO 

MOD 

IC401 

PLL 

VCO 

Amp 

Q6 

SW 

Q10 

SW 

D2~D4 

Fig. 14 

Encoder 

Q9 

SW 

D19~D30 

Q12 

SW 

BRI 

Fig. 12 

Display circuit 

5



■ Decode 

• CTCSS/DCS 

The signal (W/NO (EVOL2)) goes to DTMF IN (pin 95) of 

CPU (IC101). The CTCSS/DCS signal will pass through the 

low-pass filters in the CPU (IC101) and be decoded within the 

CPU (IC101). The DTMF signal will be decoded within the 

CPU (IC101). 

IC101 

CPU 

DTMF IN 

95 

Fig. 15 

W/NO (EVOL2) 

Decode 

■ D/A Converter 

The D/A converter (IC161) is used to adjust MO modulation, 

AF volume, TV voltage, FC reference voltage, and PC 

POWER CONTROL voltage level. 

Adjustment values are sent from the CPU as serial data. 

The D/A converter has a resolution of 256 and the following 

relationship is valid: 

D/A output = (Vin – VDAref) / 256 x n + VDAref 

Vin: Analog input 

VDAref: D/A reference voltage 

n: Serial data value from the microprocessor (CPU) 

Power Supply Circuit 

When the power switch on the display unit is pressed, the 

power port on the display unit which is connected port 17 

(POWER), goes low, then port 82 (SBC) goes high, Q32 turns 

on, SB SW (Q31) turns on and power (SB) is supplied to the 

radio. 

When the DC power supplied to the radio, the voltage 

regulator IC (IC33) supply into the CPU VDD and reset voltage 

detect IC (IC34). IC34 will generate signal (RESET) in to the 

reset terminal on the CPU (IC101) to carry out a power ON 

reset. If DC power is less than about 9.5V, the radio is unable 

to power on. 

When the DC power voltage deceases from normal voltage, 

the INT voltage detector IC (IC35) will set to high on CPU 

port 18 (INT) if B line will became less than about 9.5V. Then 

CPU send to EEPROM (IC66) the backup data and go into 

STOP mode. 

This circuit has an overvoltage protection circuit. If a DC 

voltage of 18V or higher is applied to the base of Q61, this 

voltage turns Q61 on and will set to high on CPU port 18 

(INT). Then CPU send to EEPROM (IC66) the backup data 

and go into stop mode. (See Fig. 16.) 

SB 

IGN 

R77 

R76 

POWER 

SW 

Q71 

SW 

INT 

IGN 

IC101 

CPU 

BATT 

POWER 

RESET 

Fig. 16 

SBC 

5M 

Q31 

SW 

Q32 

SW 

IC34 

RST 

D62 

5M 

Q61 

SW 

IC33 

AVR 

IC35 

INT 

Power supply circuit 

D61 

Data Terminal and Peripheral Circuits 

CN2 (data terminal) is the data communications terminal 

on the TX/RX PCB. It handles transmission control, data input/output, 

and squelch signals. 

There are two data communications modes : 9600bps 

mode and 1200bps mode. Unlike with 1200bps AFSK, with 

this type of high-speed modulation, frequency modulation is 

carried out after the digital base band signals (rectangular 

wave) are passed through a band limiting filter. For 9600bps 

GMSK for example, compared to 4800Hz signals (nearly sine 

wave signals passed through a filter), these signals have a 

hissing sound like digital modulation when listened to by ear. 

Different types of modulation, such as GMSK is distinguished 

by the type of band limiting filter. 

Pin Pin Specification 

No. Name 

1 PKD bps switching 1200bps 9600bps 

Modulation input 400mVp-p 4Vp-p 

Frequency shift 3±0.5kHz 2.2±0.5kHz 

4 PR9 Output level 500mVp-p/10kΩ 

Always output during reception 

5 PR1 Output level 500mVp-p/10kΩ 

Not output when squelch off 

Table 4 

R39 

R40 

Data terminal input/output level 

B 

6



■ Transmission Signals 

Transmission modulation signals enter from PKD of the 

data terminal (CN2). The path to the modulation depends on 

whether communications are 1200bps or 9600bps mode. 

For 1200bps mode, the transmission modulation signals 

from single analog switch (IC204) pass through MIC amplifier 

(IC201,202) and summing amplifier (IC203), and go to VCO 

(X401) through D/A converter (IC161). 

For 9600bps mode, the transmission modulation signals 

from single analog switch (IC205) pass through summing 

amplifier (IC303), go to TCXO (X401) and VCO through D/A 

converter (IC161). (See Fig. 17.) 

■ Reception Signals 

PR9 is the 9600bps data communications reception output. 

It outputs the FM detection circuit output through an AF 

filter (IC251). These signals are always output whether the 

squelch is open or closed. 

PR1 is the 1200bps data communications reception output. 

It outputs the FM detection circuit output through an AF 

filter (IC251). Output is controlled with the mute switch 

(Q252) according to whether squelch is open or closed. (See 

Fig. 17.) 

■ Squelch Signal Output Circuit 

The squelch circuits is input to the TNC to prevents conflicts 

from occurring between simultaneous receive mode 

and transmit mode traffic during packet communications 

(only during 1200bps). The signal is output from pin 29 of 

IC101 to the data terminal. The logic is as shown in the table 

below. 

SQC terminal output 

CN2 

L : SQ CLOSE 

H : SQ BUSY 

CN2 

PKD 

IC204 

Analog 

switch 

IC205 

Analog 

switch 

1200bps 

9600bps 

76 

75 

IC101 

CPU 

IC201,202 

MIC amp 

IC203 

Sum amp 

VCO, TCXO, 

D/A converter 

PR9 

Q252 

IC251 

AF filter 

D/A converter 

PR1 

PKS 

Mute SW 

D6 

PKS (CPU) pin 30 

SQC 

D5 

SQC (CPU) pin 29 

Fog. 17 

Data terminal and peripheral circuits 

7


SEMICONDUCTOR DATA 

Microprocessor : 30622MAA-B85GP (TX-RX Unit IC101) 

■ Terminal Function 

Pin No. Name I/O Function 

Pin No. Name I/O Function 

1 TONE O CTCSS/DCS/Clone output 

53 DT O Common data 

2 DTMF O DTMF/BEEP/1750Hz output 

54 CK O Common clock 

3 PLLE O PLL IC chip select 

55 NC I 

4,5 NC I 

56 DST1 I Destination 1 

6 GND - GND. 

57~59 DST2~DST4 I Destination 2~4 

7 CNVSS - 

60 VCC - +5V 

8 EVLLD O 

61 NC I 

9 BSHIFT O Beat shift 

62 VSS - GND 

10 RESET - Reset 

63 ADJ I For adjustment mode 

11 XOUT - X’tal (8MHz) 

64 NARROW O Wide/Narrow 2 

12 VSS - GND 

65 WIDE O Wide/Narow 

13 XIN - X’tal (8MHz) 

66,67 NC I 

14 VCC - +5V 

68 LCDCL O Clock for LCD 

15 NMI - (Input only) 

69 LCDCE O Chip enable for LCD 

16 NC I 

70 LCDDO O Output data to LCD 

17 POWER I Power key input 

71 LCDDI I Input data from LCD 

18 INT I µcom stop 

72 NC I 

19 NC I 

73 ENCB I Encoder input B 

20 TX/RX O TX/RX 

74 ENCA I Encoder input A 

21 UL I PLL unlock detect 

75 TNC9600 O TNC speed H : 9600, L : 1200 

22,23 NC I 

76 TNC1200 O TNC speed L : 9600, H : 1200 

24 EEPSDT I/O EEPROM data 

77 MICMT O MIC mute 

25 EEPCK O EEPROM clock 

78 NC I NC 

26 EEPWP O EEPROM write protect 

79 8RC O 8R control 

27,28 NC I (Nch open drain) 

80 8TC O 8T control 

29 SQC O Squelch signal output for TNC 

81 NC I 

(TxD for flash) 

82 SBC O Battery switch 

30 PKS I PTT input for TNC (RxD for flash) 

83~85 NC I 

31 CLKFLS I (GND) 

86 CM I/O MIC key check 

32 BSYFLS O (Vcc) 

87 I For AMR DTMF keypad MIC 

33 TXD O To PC 

88 I For AMR DTMF keypad MIC 

34 RXD I From PC 

89 VOL I Volume encoder 

35 PTT I PTT input 

90 TEMP2 I Temperature 2 

36~38 NC I 

91 TEMP1 I Temperature 1 

39 EMPFLS I/O (GND) 

92 RSSI I RSSI input 

40~43 NC I 

93 SQIN I Squelch input 

44 CEFLS I/O (Vcc) 

94 AVSS - GND 

45~49 NC I 

95 DTMF IN I CTCSS/DCS/Clone/1050Hz input 

50 AFM O AF mute 

96 VREF - +5V 

51 SPM O Speaker mute 

97 AVCC - +5V 

52 AMPSW O AF AMP switch 

98~100 NC I 

8

COMPONENTS DESCRIPTION 


Display Unit (X54-3450-10) 

Ref. No. Parts name Description 

IC3 IC LCD controller 

Q6 Transistor DC switch 

Q9 Transistor LCD backlit switch 

Q10 Transistor Key backlit switch 

Q12 Transistor Brightness function switch 

D2~4 LED Key backlit 

D19~30 LED LCD backlit 

D31 Diode Reverse connection protection 

TX-RX Unit (X57-685X-XX) 


IC31 IC Voltage regulator (8C) 

IC32 IC Voltage regulator (5C) 

IC33 IC Voltage regulator (5M) 

IC34 IC Voltage detector (reset) 

IC35 IC Voltage detector (int) 

IC66 IC EEPROM 

IC101 IC CPU 

IC161 IC Digital potentiometer 

IC201 IC MIC amplifier / IDC 

IC202 IC MIC amplifier / Splatter filter 

IC203 IC Buffer amplifier / SUM amplifier 

/ DC amplifier / 1/2 Vcc 

IC204,205 IC Single analog switch 

IC251 IC Audio filter 

IC252 IC Audio amplifier 

IC301 IC FM demodulation 

IC401 IC PLL synthesizer 

IC402 IC Divider (Hetero) 

IC501 IC APC controller 

Q31,32 Transistor DC switch (SB) / Active when power is on 

Q33,34 Transistor DC switch (8R) / Active while RX 

Q35,36 Transistor DC switch (8T) / Active while TX 

Q61 Transistor Over voltage detection / Active when 

PS voltage is more than 18V 

Q86,87 Transistor Beat shift / Active while beat shift is on 

Q201 Transistor AGC / MIC mute 

Q251 Transistor Buffer amplifier / RX audio 

Q252,253 FET AF mute / Active while AFM is H 

Q254 Digital transistor AF mute / Active while SPM is H 

Q255 Transistor AF mute / Active while AMPSW is H 

Q301 Transistor Noise amplifier / SQL amplifier 


Q302 Transistor Buffer amplifier / 16.8MHz 3rd over tone 

Q351 Transistor IF amplifier 

Q352 FET Mixer 

Q353 FET RF amplifier / LNA 

Q354 Transistor PC/TV switch 

Q402,403 Transistor Charge pump 

Q404 Transistor RF amplifier / PLL F in 

Q405 FET RX VCO 

Q406 FET TX VCO 

Q407 FET T/R switch 

Q408 Transistor T/R switch 

Q410 Transistor Buffer amplifier / Output of VCO 

Q411 Transistor RF amplifier / Output of VCO 

Q440 Transistor Lipple filter 

Q501,502 Transistor RF amplifier / Drive stage 

Q503 FET RF amplifier / Drive amplifier 

Q504 FET RF amplifier / Final amplifier 

D1 Diode Surge absorption / CM 

D2 Diode Surge absorption / MIC key 

D3 Diode Surge absorption / RXD 

D4 Diode Surge absorption / PTT 

D5 Diode Surge absorption / SQC 

D6 Diode Surge absorption / PKS 

D31 Diode Reverse connection protection 

D32 Poly switch Current protection 

D61,62 Diode Over voltage detection 

D201 Diode OR gate / MIC mute, AGC 

D202 Diode AGC 

D251 Diode Limiter 

D301 Diode Detection 

D302,303 Diode IF switch (Wide/Narrow) 

D351~354 Varicap RF BPF tuning 

D401 Diode Ripple filter 

D402 Diode Voltage dropped 

D403,404 Varicap RX VCO 

D405,406 Varicap TX VCO 

D407 Varicap Modulation 

D408 Diode Lipple filter 

D409 Diode RF switch (TX/RX) 

D501,502 Diode Temperature compensation 

D503 Diode Voltage protection 

D602,603 Diode ANT switch 

D605 Diode ANT switch 

D606,607 Diode APC voltage detect 

D608 Diode Temperature compensation 

9


PARTS LIST 

✽ New Parts. indicates safety critical components. 

Parts without Parts No. are not supplied. 

Les articles non mentionnes dans le Parts No. ne sont pas fournis. 

Teile ohne Parts No. werden nicht geliefert. 

TM-271A/E 

DISPLAY UNIT (X54-3450-10) 

Ref. No. Address New Parts No. Description Destination 

parts 

10 


1 1B ✽ A01-2193-01 CABINET 

2 3B A10-4048-21 CHASSIS 

3 3A ✽ A62-1088-03 PANEL ASSY 

5 1D ✽ B62-1738-10 INSTRUCTION MANUAL K,M2,M3 

5 1D ✽ B62-1738-10 INSTRUCTION MANUAL E 

5 1D ✽ B62-1739-10 INSTRUCTION MANUAL K,M2,E 

5 1D ✽ B62-1745-10 INSTRUCTION MANUAL M3 

5 1D ✽ B62-1746-10 INSTRUCTION MANUAL M4 

5 1D ✽ B62-1784-10 INSTRUCTION MANUAL E 

6 3B ✽ B72-2171-04 MODEL NAME PLATE K 

6 3B ✽ B72-2172-04 MODEL NAME PLATE M2 



6 3B ✽ B72-2175-04 MODEL NAME PLATE E 

8 3B E04-0167-05 RF COAXIAL PECEPTACLE (M) K,M2,M3 

8 3B E04-0167-05 RF COAXIAL PECEPTACLE (M) M4 

9 3B E04-0170-05 RF COAXIAL RECEPTACLE (N) E 

10 3C E30-2111-15 DC CORD ACCESSORY K,M2,M3 

10 3C E30-2111-15 DC CORD ACCESSORY M4 

11 3C ✽ E30-3452-05 DC CORD ACCESSORY E 

12 2B ✽ E30-7501-05 TNC CABLE E 

13 2B ✽ E30-7512-05 DC CORD (RADIO) K,M2,M3 

13 2B ✽ E30-7512-05 DC CORD (RADIO) M4 

14 2B ✽ E30-7513-05 DC CORD (RADIO) E 

15 3A E37-1082-05 SPEAKER WIRE 

16 2A ✽ E37-1097-05 FLAT CABLE 

17 3C ✽ F51-0024-05 FUSE (BLADE) (15A/32V) E 

18 2B F10-2449-01 SHIELDING COVER 

20 3C F51-0017-05 FUSE (6✽30) (15A) K,M2,M3 

20 3C F51-0017-05 FUSE (6✽30) (15A) M4 

23 2B G02-0894-04 EARTH SPRING (FINAL FET) 

24 2A ✽ G10-1324-04 FIBROUS SHEET (DISPLAY UNIT) 

25 3B G11-4127-14 RUBBER SHEET (CHASSIS) 

26 2B G11-4240-04 RUBBER SHEET (DRIVE FET) 

27 3B G13-1468-04 CUSHION (CHASSIS) K,M2,M3 

27 3B G13-1468-04 CUSHION (CHASSIS) M4 

28 3A G53-1525-03 PACKING (PANEL) 

29 2B G53-1542-03 PACKING (PHONE JACK) 

30 1B G53-1544-01 PACKING (SHIELDING COVER) 

31 1A G53-1548-02 GASKET 

33 2C,1D H12-3112-05 PACKING FIXTURE 

34 3D H13-1190-02 CARTON BOARD 

36 1D H25-2341-04 PROTECTION BAG 

37 2D ✽ H52-1995-12 ITEM CARTON CASE K,M2 

37 2D ✽ H52-2027-02 ITEM CARTON CASE M3 

37 2D ✽ H52-2028-02 ITEM CARTON CASE M4 

37 2D ✽ H52-2029-12 ITEM CARTON CASE E 

39 3C J19-1584-05 MIC HOLDER ACCESSORY 

40 3D J29-0662-03 BRACKET ACCESSORY 

42 3A ✽ K29-9291-01 KEY TOP 

43 3A ✽ K29-9292-03 KNOB (VOLUME) 

L : Scandinavia K : USA P : Canada 

Y : PX (Far East, Hawaii) T : England E : Europe 

Y : AAFES (Europe) X : Australia M :Other Areas 


parts 

44 3A ✽ K29-9293-03 KNOB (ENCODER) 

A 2B N67-2608-46 PAN HEAD SEMS SCREW 

B 2A N80-2010-45 PAN HEAD TAPTITE SCREW 

C 2B,3B N87-2606-46 BRAZIER HEAD TAPTITE SCREW 

D 1B,2B N87-2614-46 BRAZIER HEAD TAPTITE SCREW 

46 3D N99-0395-05 SCREW SET ACCESSORY 

48 3A T07-0739-05 SPEAKER 

49 2C T91-0624-05 MICROPHONE ACCESSORY M2,M4 

50 2C ✽ T91-0641-05 MICROPHONE ACCESSORY K,M3,E 


101 2A ✽ B11-1809-03 ILLUMINATION GUIDE (LCD) 

102 2A ✽ B38-0885-05 LCD 

D2-4 B30-2205-05 LED (YG) 

D19-30 B30-2205-05 LED (YG) 

C4 CC73GCH1H101J CHIP C 100PF J 

C15,16 CC73GCH1H101J CHIP C 100PF J 

C19 CK73GB1H681K CHIP C 680PF K 


C24 CK73GB1C104K CHIP C 0.10UF K 




C31-33 CK73GB1H102K CHIP C 1000PF K 

C34,35 CK73GB1H472K CHIP C 4700PF K 

C36 CK73GB0J105K CHIP C 1.0UF K 


C39,40 CK73GB1C104K CHIP C 0.10UF K 

103 2A ✽ E29-1201-04 INTER CONNECTOR (LCD) 

CN1 E40-6005-05 FLAT CABLE CONNECTOR 

J1 E08-0877-05 MODULAR JACK 

104 2A ✽ J21-8463-03 HARDWARE FIXTURE (LCD) 

L1 L92-0138-05 FERRITE CHIP 

CP1 R90-0724-05 MULTI-COMP 1K X4 

R8 RK73GB1J102J CHIP R 1.0K J 1/16W 


R21-23 RK73GB1J103J CHIP R 10K J 1/16W 

R25 RK73GB1J563J CHIP R 56K J 1/16W 


R41 RK73FB2A560J CHIP R 56 J 1/10W 


R43 RK73GB1J821J CHIP R 820 J 1/16W 




R47,48 RK73GB1J473J CHIP R 47K J 1/16W 

R49,50 RK73FB2A560J CHIP R 56 J 1/10W 

R51-53 R92-1252-05 CHIP R 0 OHM J 1/16W 


K,M2,M3,M4 : TM-271A 

E 

: TM-271E


parts 

R55 R92-1252-05 CHIP R 0 OHM J 1/16W 

VR1 ✽ R31-0646-05 VARIABLE RESISTOR 

D31 1SS355 DIODE 

IC3 ✽ LC75854W MOS IC 

IC3 PT6554LQ MOS IC 

Q6 KRC102S DIGITAL TRANSISTOR 

Q9 2SB1132(Q,R) TRANSISTOR 

Q10 KRA225S DIGITAL TRANSISTOR 

Q12 UMG3N TRANSISTOR 

S1 ✽ W02-3665-05 ENCODER 

TX-RX UNIT (X57-685X-XX) 

0-10 : K 0-21 : M2 0-22 : M3 0-23 : M4 2-71 : E 






PARTS LIST 




Ref. No. Address New 

parts 

Parts No. Description Destination 

C206 CK73GB1H681K CHIP C 680PF K E 

C207 CK73GB1C223K CHIP C 0.022UF K K,M2,M3 

C207 CK73GB1C223K CHIP C 0.022UF K M4 

C207 CK73GB1C393K CHIP C 0.039UF K E 

C208 CK73GB1H103K CHIP C 0.010UF K 









C217,218 C92-0560-05 CHIP-TAN 10UF 6.3WV 

C220 C92-0507-05 CHIP-TAN 4.7UF 6.3WV 


C225 C92-0004-05 CHIP-TAN 1.0UF 16WV 


C227 CK73GB1E103K CHIP C 0.010UF K 

C228 C92-0560-05 CHIP-TAN 10UF 6.3WV 


C34 ✽ CE04EQ1E331M ELECTRO 330UF 25WV 



C41 C92-0795-05 CHIP-TAN 22UF 10WV 


C43-45 C92-0795-05 CHIP-TAN 22UF 10WV 

C49,50 CK73GB1H103K CHIP C 0.010UF K 









C87 CC73GCH1H030C CHIP C 3.0PF C 

C88,89 CC73GCH1H040C CHIP C 4.0PF C 

C90 CC73GCH1H030C CHIP C 3.0PF C 












C165 CK73GB1A105K CHIP C 1.0UF K 



C203 CK73GB1C273K CHIP C 0.027UF K K,M2,M3 

C203 CK73GB1C273K CHIP C 0.027UF K M4 

C203 CK73GB1C473K CHIP C 0.047UF K E 



C206 CK73GB1H102K CHIP C 1000PF K K,M2,M3 

C206 CK73GB1H102K CHIP C 1000PF K M4 









C253,254 CK73GB1A224K CHIP C 0.22UF K 




C258-261 CK73GB1H103J CHIP C 0.010UF J 











C274 CK73FB1C224K CHIP C 0.22UF K 





C280 C92-0040-05 CHIP-ELE 47UF 16WV 


C282 ✽ CE04EQ1E331M ELECTRO 330UF 25WV 





C304,305 CC73GCH1H331J CHIP C 330PF J 






E 

: TM-271E 

11


PARTS LIST 



parts 






C315-318 CK73GB1C104K CHIP C 0.10UF K 










C354 CC73GCH1H4R5B CHIP C 4.5PF B 


C356 CC73GCH1H030B CHIP C 3.0PF B 




























C391 CC73GCH1H160G CHIP C 16PF G 


C401-403 CC73GCH1H101J CHIP C 100PF J 














12 


parts 


C425 C92-0001-05 CHIP C 0.1UF 35WV 









C435 CC73GCH1H100C CHIP C 10PF C 

C436 CC73GCH1HR75B CHIP C 0.75PF B 




C440 CC73GCH1H110G CHIP C 11PF G 



































C522 CK73FB1H102K CHIP C 1000PF K 








C533 C93-0572-05 CHIP C 100PF J 


C541,542 CM73F2H120J CHIP C 12PF J 


E 


PARTS LIST 



parts 


C543,544 CM73F2H150J CHIP C 15PF J 

C545 C93-0603-05 CHIP C 1000PF K 


C549 CM73F2H221J CHIP C 220PF J 

C550 CM73F2H680J CHIP C 68PF J 

C552 C93-0564-05 CHIP C 22PF J 

C553 C93-0553-05 CHIP C 3.0PF C 

C554 C93-0603-05 CHIP C 1000PF K 

C555 C93-0555-05 CHIP C 5.0PF C 

C556 C93-0603-05 CHIP C 1000PF K 

C557,558 CK73GB1H103K CHIP C 0.010UF K 





C602 C93-0561-05 CHIP C 12PF J 

C603 C93-0603-05 CHIP C 1000PF K 

C605 C93-0562-05 CHIP C 15PF J 



C608 C93-0565-05 CHIP C 27PF J 



C613 C93-0565-05 CHIP C 27PF J 

C614 C93-0553-05 CHIP C 3.0PF C E 

C615 C93-0564-05 CHIP C 22PF J 


C623 C93-0553-05 CHIP C 3.0PF C 

TC401 C05-0399-05 CERAMIC TRIMMER (6PF) 

TC402 C05-0245-05 CERAMIC TRIMMER (10PF) 

- E11-0425-05 3.5D PHONE JACK (3P) 

- E37-1127-05 PROCESSED LEAD WIRE 

CN1 E40-6268-05 FLAT CABLE CONNECTOR 

CN2 E40-5705-05 PIN ASSY 

CN5 E40-3246-05 PIN ASSY 

F1 F53-0246-05 FUSE (4.0A/32V) 

F501 F53-0108-05 FUSE (1.8A/50V) 

CF301 L72-0993-05 CERAMIC FILTER 

CF302 L72-0999-05 CERAMIC FILTER 



L301 L34-4554-05 COIL 

L302 L41-3385-08 SMALL FIXED INDUCTOR 

L303,304 L40-3381-86 SMALL FIXED INDUCTOR (0.33UH) 



L354-356 L34-4612-05 AIR-CORE COIL 

L357 L34-4610-05 AIR-CORE COIL 





L406,407 L40-2785-92 SMALL FIXED INDUCTOR (270NH) 

L408 L40-3378-67 SMALL FIXED INDUCTOR (33NH) 

L409,410 L40-2702-86 SMALL FIXED INDUCTOR (27UH) 

L411,412 L40-2785-92 SMALL FIXED INDUCTOR (270NH) 


L414,415 L40-2702-86 SMALL FIXED INDUCTOR (27UH) 

L416,417 L92-0443-05 FERRITE CHIP 


E 




parts 








L501,502 L41-6875-08 SMALL FIXED INDUCTOR 

L503,504 L41-2775-06 SMALL FIXED INDUCTOR 






L601 ✽ L34-4737-05 AIR-CORE COIL 

L602-604 ✽ L34-4736-05 AIR-CORE COIL 


X86 ✽ L78-1409-05 RESONATOR (8.00MHZ) 

X401 ✽ L77-1944-05 TCXO (16.8MHZ) 

XF351 L71-0620-05 MCF (49.95MHZ) 

R1 R92-1252-05 CHIP R 0 OHM J 1/16W 

R2,3 RK73GB1J101J CHIP R 100 J 1/16W 

R4-8 RK73GB1J102J CHIP R 1.0K J 1/16W 


R32 R92-1215-05 CHIP R 470 J 1/2W 





R37 R92-1252-05 CHIP R 0 OHM J 1/16W 






R62,63 R92-1252-05 CHIP R 0 OHM J 1/16W 



R82 R92-1252-05 CHIP R 0 OHM J 1/16W 

R86 R92-1252-05 CHIP R 0 OHM J 1/16W 


R91,92 RK73GB1J102J CHIP R 1.0K J 1/16W 









R118 R92-1252-05 CHIP R 0 OHM J 1/16W 

R119 R92-0670-05 CHIP R 0 OHM K,M3,M4 

R119 R92-0670-05 CHIP R 0 OHM E 

R120 R92-1252-05 CHIP R 0 OHM J 1/16W M4 

R120-123 R92-1252-05 CHIP R 0 OHM J 1/16W K 

R121-123 R92-1252-05 CHIP R 0 OHM J 1/16W E 

R122,123 R92-1252-05 CHIP R 0 OHM J 1/16W M2,M3,M4 




13


PARTS LIST 



parts 







R204 RK73GB1J103J CHIP R 10K J 1/16W E 

R204 RK73GB1J183J CHIP R 18K J 1/16W K,M2,M3 

R204 RK73GB1J183J CHIP R 18K J 1/16W M4 



R207 RK73GB1J105J CHIP R 1.0M J 1/16W E 

R207 RK73GB1J754J CHIP R 750K J 1/16W K,M2,M3 

R207 RK73GB1J754J CHIP R 750K J 1/16W M4 











R220,221 RK73GH1J153D CHIP R 15K D 1/16W 












R234 R92-1252-05 CHIP R 0 OHM J 1/16W 


R237 R92-1252-05 CHIP R 0 OHM J 1/16W 








R253 R92-1252-05 CHIP R 0 OHM J 1/16W 



R257 RK73GB1J105J CHIP R 1.0M J 1/16W 






R263 RK73GH1J913D CHIP R 91K D 1/16W 

R264 RK73GH1J124D CHIP R 120K D 1/16W 

R265 RK73GH1J562D CHIP R 5.6K D 1/16W 




14 


parts 











R281 R92-0670-05 CHIP R 0 OHM 



















R324 R92-1252-05 CHIP R 0 OHM J 1/16W 
















R364 R92-1252-05 CHIP R 0 OHM J 1/16W 





R369 R92-1252-05 CHIP R 0 OHM J 1/16W 












E 


PARTS LIST 



parts 








R415 R92-1252-05 CHIP R 0 OHM J 1/16W 


















R434 R92-1252-05 CHIP R 0 OHM J 1/16W 






R440-442 RK73GB1J101J CHIP R 100 J 1/16W 














R513 RK73FB2A222J CHIP R 2.2K J 1/10W 

R514 R92-1217-05 CHIP R 0 OHM 

R516 R92-0670-05 CHIP R 0 OHM 

R518 RK73EB2B330J CHIP R 33 J 1/8W 




R522 RK73EB2B331J CHIP R 330 J 1/8W 


R524 R92-1215-05 CHIP R 470 J 1/2W 


R526 R92-1261-05 CHIP R 150 J 1/2W 


R528,529 RK73GB1J471J CHIP R 470 J 1/16W 




E 




parts 


R532,533 R92-1252-05 CHIP R 0 OHM J 1/16W 





R800 R92-1061-05 JUMPER 

VR601 R12-6427-05 TRIMMING POT. (47K/12) 

D1-6 DA221 DIODE 

D31 ZSH5MA27 SURGE ABSORBER 

D32 1812L110PR VARISTOR 

D61 02DZ18(X,Y) ZENER DIODE 

D62 MA2S077 DIODE 

D201 DAN222 DIODE 


D251 MA742 DIODE 

D301 MA742 DIODE 

D302,303 DAN222 DIODE 

D351-354 HVC376B VARIABLE CAPACITANCE DIODE 


D402 HZU5ALL DIODE 

D403-406 MA2S304 VARIABLE CAPACITANCE DIODE 

D407 1SV278 VARIABLE CAPACITANCE DIODE 


D409 DAN235E DIODE 


D502 DA221 DIODE 

D503 02DZ5.1(Y) ZENER DIODE 

D602 MA4PH633 DIODE 

D603 XB15A709 DIODE 

D605 XB15A709 DIODE 

D606,607 MA742 DIODE 


IC31 KIA7808AF ANALOG IC 

IC32,33 NJM78L05UA BI-POLAR IC 

IC34 ✽ BD4732G MOS IC 

IC35 BD4740G MOS IC 

IC66 AT24C64A10SI18 ROM IC 

IC66 ✽ CAT24WC64JI ROM IC 

IC101 ✽ 30622MAA-B85GP MPU 

IC161 M62363FP MOS IC 

IC201 NJM2100V MOS IC 

IC202 ✽ BA10358FV MOS IC 

IC203 ✽ BA10324AFV MOS IC 

IC204,205 BU4S66 MOS IC 

IC251 ✽ BA10324AFV MOS IC 

IC252 2B LA4600 BI-POLAR IC 

IC301 TK14489V BI-POLAR IC 

IC401 MB15A02 MOS IC 

IC402 UPB1509GV BI-POLAR IC 

IC501 TA75W01FU MOS IC 

Q31 2SA1641(S,T) TRANSISTOR 


Q33 2SA1745(6,7) TRANSISTOR 


Q35 KTA1664(Y) TRANSISTOR 


Q61 KRC404RTK DIGITAL TRANSISTOR 

Q86,87 2SK1830 FET 

Q201 2SC4919 TRANSISTOR 

15


PARTS LIST 



parts 


Q251 2SC2412K TRANSISTOR 

Q252,253 2SK3019 FET 

Q254 DTC363EU DIGITAL TRANSISTOR 


Q301,302 2SC2412K TRANSISTOR 


parts 

Q351 ✽ 2SC5488 TRANSISTOR 

Q352,353 3SK318 FET 

Q354 2SK1830 FET 

Q402 2SA1832(GR) TRANSISTOR 

Q403 2SC4738(GR) TRANSISTOR 

Q404 2SC4649(N,P) TRANSISTOR 

Q405,406 2SK508NV(K52) FET 

Q407 2SJ347 FET 

Q408 KRX102U TRANSISTOR 

Q410 2SC5108(Y) TRANSISTOR 

Q411 2SC4649(N,P) TRANSISTOR 

Q440 2SC2412K TRANSISTOR 

Q501,502 2SC3357 TRANSISTOR 

Q503 PD55003TR DRIVE FET 

Q504 2B RD70HVF1-01 FINAL FET 

TH97,98 ✽ NCP18WF104J03 THERMISTOR 

TH301 ✽ NCP18WF104J03 THERMISTOR 

16 


E 


EXPLODED VIEW 


A 

B 

1 

A M2.6 x 8 : N67-2608-46 

B M2 x 10 BLK : N80-2010-45 

C M2.6 x 6 (Br-Tap) : N87-2606-46 

D M2.6 x 14 (Br-Tap) : N87-2614-46 

1 

31 

30 

Dx8 

16 

18 

12 

2 

104 

102 

Display unit 

101 

103 

Bx2 

24 

24 

IC252 

A 

29 

Cx12 

Ax2 

26 23 

Q504 

13,14 

14 

13 

48 

42 

25 27 

TX-RX unit 

15 

8 Cx2 

Cx2 

3 

9 

2 

43 

3 

28 

6 

702 

Standard label 

: K 

44 

703 

Sticker : M3 

700 

Caution label 

701 

S/No. label 

Parts with the exploded numbers larger than 700 are not supplied. 

17


PACKING 

C 

D 

5 Instruction manual 

(B62-1738-10) : K,M2,M3,E 

(B62-1739-10) : K,M2,E 

(B62-1745-10) : M3 

(B62-1746-10) : M4 

(B62-1784-10) : E 

704 Pamphlet 

705 Warranty card 

1 

36 Protection bag 

(H25-2341-04) 

33 Packing fixture 

(H12-3112-05) 

50 Microphone 

(T91-0641-05) : K,M3,E 

49 Microphone 

(T91-0624-05) : M2,M4 

33 Packing fixture 

(H12-3112-05) 

36 Protection bag 

(H25-2341-04) 

2 

37 Item carton case 

(H52-1995-12) : K,M2 

(H52-2027-02) : M3 

(H52-2028-02) : M4 

(H52-2029-12) : E 

11 DC cord 

(E30-3452-05) : E 

46 Screw set 

(N99-0395-05) 

3 

10 DC cord 

(E30-2111-15) : K,M2,M3,M4 

20 Fuse (6x30, 15A) 

(F51-0017-05) : K,M2,M3,M4 

40 Bracket 

(J29-0662-03) 

17 Fuse (Blade, 15A/32V) 

(F51-0024-05) : E 

39 MIC holder 

(J19-1584-05) 

34 Carton board 

(H13-1190-02) 

18 

Parts with the exploded numbers larger than 700 are not supplied.

RESETTING THE TRANSCEIVER 


Resetting the Tansceiver 

If your transceiver seems to be malfunctioning, resetting 

the microprocessor may solve the problem. The following 2 

reset modes are available. When performing the reset, you 

may lose memory data and stored information. Back up or 

write down important data before performing the reset. 

■ Initial Settings 

The factory defaults for the operating frequencies are as 

follows. 

Transceiver : 144.000MHz 

The Memory Channels have no data stored. The Weather 

Radio frequency (AL channel) is restored as 162.550MHz (K 

market model only). The Call Channel and frequency step 

size default values. 

Note : When in Channel Display Mode or while Key Lock is 

activated, you cannot perform VFO reset or Full reset. 

■ Full Reset 

This resets all transceiver parameters to the factory default 

values. There are two methods available for resetting 

the transceiver. 

• Full Reset Method 1: 

1. With the transceiver power OFF, press [F]+[ ] (Power). 

• All indicators light momentarily, followed by the full reset 

confirmation message. 

■ VFO Reset 

This resets the transceiver parameters excluding the 

DTMF Memory, the Memory channel contents, and the Call 

channel contents. There are two methods available for resetting 


Note : Menu No. 7 (P.VFO) and Menu No. 10 (OFFSET) return 

to the factory default values. 

• VFO Reset Method 1: 

1. With the transceiver power OFF, press [VFO]+[ ] 

(Power). 

• The VFO reset confirmation message appears. 

2. Press [VFO]. 

• “SURE ?” appears. 

• Press any key other than [VFO] to cancel. 

3. Press [VFO] again to reset the transceiver. 

• “WAIT” appears momentarily. 

• VFO Reset Method 2: 

1. Press [F], [MENU] and turn the Tuning control to select 

Menu No. 99 (RESET). 

2. Press [MENU] and turn the Tuning control to select 

“VFO”. 

3. Press [MENU]. 


2. Press [F]. 


• Press any key other than [F] to cancel. 

3. Press [F] again to reset the transceiver. 


• Full Reset Method 2: 

1. Press [F], [MENU] and turn the Tuning control to select 

Menu No. 99 (RESET). 

2. Press [MENU] and turn the Tuning control to select 

“FULL”. 

3. Press [MENU]. 


• Press any key other than [MENU] to cancel. 

4. Press [MENU] to reset the transceiver. 

• Press any key other than [MENU] to cancel. 

4. Press [MENU] to reset the transceiver. 


19


ADJUSTMENT 

20 

Adjustment Mode 

In Adjustment Mode, the transceiver can adjusted using 

its panel keys. 

■ Items that can be adjusted in Adjustment Mode *1 

1. Frequency Tune 

7. DCS Fine Deviation *3 

2. Transmit High Power *2 8. DTMF Fine Deviation 

3. Transmit Low Power *2 9. Band Pass Tuning *4 

4. DCS Balance *3 

10. Squelch Tight *5 

5. Max Deviation *3 

11. Squelch Open *5 

6. CTCSS Fine Deviation *3 12. S-Meter S1 Level 

13. S-Meter Full Level 

Note : 

*1 : The PLL lock voltage and Max Power Alignment for 

transmission cannot be adjusted in Adjustment Mode. 

*2 : Adjusted in 5 points in the transmission operating frequency 

range. 

*3 : Adjusted in 3 points for the Wide Band Width in the 

transmission operating frequency range. 

Adjusted in 1 point for the Narrow Band Width 

*4 : Adjusted in 3 points in the reception operating frequency 

range. 

*5 : Adjusted in 3 points for the Wide Band Width in the reception 

operating frequency range. 

Adjusted in 1 point for the Narrow Band Width 

■ How to Enter Adjustment Mode 

To perform adjustments with transceiver panel keys, the 

transceiver must be set to “Adjustment Mode”. 

While shorting the following figure terminals on the PCB 

with tweezers, etc., turn the power switch ON to enter Adjustment 

Mode. (See Fig. 1.) 

TX-RX unit 

Component side 

■ LCD Display When Adjustment Mode is Enabled 

Example of Frequency Tune. See “Table 1” for an LCD 

display list. 

q 

r 

w 

Fig. 1 

Fig. 2 

e 

q Blinks in Adjustment Mode. 

w Adjustment item display 

e Adjustment value display. Can be adjusted while it is 

“blinking”. 

Displayed as a hexadecimal number from 00 to FF. 

r Adjustment value stored in memory. 

When an adjustment value is determined, it is equal to the 

value in “3”. 

■ Panel Key Operation Method in Adjustment Mode 

q 

TM-271 

MENU 

q Power switch/Volume control 

w When the knob is pressed once, the adjustment value display 

blinks. (Select an adjustment item with “4” or “5” 

key before performing the operation. It cannot be performed 

while transmitting.) 

When the knob is rotated while the adjustment display is 

blinking, the adjustment value changes. (Adjust transmission 

items while transmitting.) 

When the knob is pressed again, the adjustment value 

stops blinking and lights, and the adjustment value is 

saved in the memory of the transceiver. (For transmission 

item adjustment, enter receive mode before performing 

the operation.) 

e Changing between adjustment value display and frequency 

display 

The display changes as follows : Adjustment value display 

→ Transmit frequency display → Receive frequency display 

→ Adjustment value display. 

The frequency for adjustment can be confirmed. 

r Moves the adjustment item backward. (If it is operated 

when a frequency is displayed, the adjustment item display 

returns.) 

t Moves the adjustment item forward. (If it is operated 

when a frequency is displayed, the adjustment item display 

returns.) 

y If it is pressed before determining the adjustment value, 

the adjustment value of the Adjustment item returns to its 

original value. 

u Not used in Adjustment Mode. 

Note : 

If Max Power for transmission is low, check the DC cable. 

If the DC cable connector has poor contact due to rust or 

stain, voltage may drop occur frequently and correct transmission 

power may not be supplied. 

In this case, polish the DC cable connector. If the problem 

still persists, replace the DC cable with a new one. 

w 

e r t y u 

Fig. 3



Adjustment Item Adjustment On the Note Transmit Receive Signalling 

Frequency Point Display (MHz) (MHz) 

Frequency Tune Center 155.10 155.05 

TX High Power Low “H” icon appear 136.10 136.05 

Low’ 142.10 142.05 

Center 150.10 150.05 

High’ 156.10 156.05 

High 173.90 173.95 

TX Low Power Low “L” icon appear 136.10 136.05 

Low’ 142.10 142.05 

Center 150.10 150.05 

High’ 156.10 156.05 

High 173.90 173.95 

DCS Balance Low “DCS” icon appear 136.10 136.05 DCS : 023N 

Center 155.10 155.05 

High 173.90 173.95 

DCS Balance (Narrow) Center “DCS” and “N” icon appear 155.10 155.05 

Max Deviation Low 136.10 136.05 

Center 155.10 155.05 

High 173.90 173.95 

Max Deviation (Narrow) Center “N” icon appear 155.10 155.05 

CTCSS Fine Deviation Low “CT” icon appear 136.10 136.05 CTCSS : 88.5Hz 

Center 155.10 155.05 

High 173.90 173.95 

CTCSS Fine Deviation (Narrow) Center “CT” and “N” icon appear 155.10 155.05 

DCS Fine Deviation Low “DCS” icon appear 136.10 136.05 DCS : 023N 

Center 155.10 155.05 

High 173.90 173.95 

DCS Fine Deviation (Narrow) Center “DCS” and “N” icons appear 155.10 155.05 

DTMF Fine Deviation Center 155.10 155.05 DTMF : 9 

DTMF Fine Deviation (Narrow) Center “N” icon appear 155.10 155.05 

Band Pass Tuning Low “BUSY” icon appear 136.10 136.05 

Center 155.10 155.05 

High 173.90 173.95 

Squelch Tight Low 136.10 136.05 

Center 146.10 146.05 

High 173.90 173.95 

Squelch Tight (Narrow) Center “N” icon appear 146.10 146.05 

Squelch Open Low 136.10 136.05 

Center 146.10 146.05 

High 173.90 173.95 

Squelch Open (Narrow) Center “N” icon appear 146.10 146.05 

S-Meter S1 Level Center 146.10 146.05 

S-Meter Full Level Center 146.10 146.05 

Table 1 

Adjustment items, display and test frequency list 

21



Test Equipment Required for Alignment 

Test Equipment 

Major Specifications 

1. Standard Signal Generator Frequency Range 136 to 175MHz 

(SSG) Modulation Frequency modulation and external modulation 

Output 

–127dBm/0.1µV to greater than –7dBm/100mV 

2. Power Meter Input Impedance 50Ω 

Operation Frequency 136 to 175MHz or more 

Measurement Capability Vicinity of 100W 

3. Deviation Meter Frequency Range 136 to 175MHz 

4. Digital Volt Meter Measuring Range 1 to 20V DC 

(DVM) Accuracy High input impedance for minimum circuit loading 

5. Oscilloscope DC through 30MHz 

6. High Sensitivity Frequency Range 10Hz to 1000MHz 

Frequency Counter Frequency Stability 0.2ppm or less 

7. Ammeter 20A 

8. AF Volt Meter Frequency Range 50Hz to 10kHz 

(AF VTVM) Voltage Range 1mV to 3V 

9. Audio Generator (AG) Frequency Range 20Hz to 20kHz or more 

Output 

0 to 1V 

10. Distortion Meter Capability 3% or less at 1kHz 

Input Level 

50mV to 10Vrms 

11. 8Ω Dummy Load Approx. 8Ω, 10W or more 

12. Regulated Power Supply 13.8V, approx. 20A (adjustable from 9 to 17V) 

Useful if ammeter requipped 

13. Spectrum Analyzer Center frequency 50KHz to 1000MHz 

14. Tracking Generator Output Voltage 100mV or more 

Test cable for microphone input (E30-3360-08) 

Tuning cable (E30-3383-05) 

1 GREEN 

RED 

2 

BLACK 

3 

BLUE 

4 

SHIELD 

5 

WHITE 

6 

GRAY 

7 

YELLOW 

8 

E 

PTT 

MIC-E 

MIC 

HK 

1 

2 

3 

4 

5 

6 

7 

8 

Adapter cable (E30-3383-05) is required for 

injecting an audio if adjustment mode is 

used. 

MIC connector 

(Front view) 

8 

1 

Lead wire + 

MIC 

Shield wire – 

1 : BLC 

2 : PSB 

3 : E 

4 : PTT 

5 : ME 

6 : MIC 

7 : HOOK 

8 : CM 

22



Adjustment Location 

■ Adjustment Points 

• Speaker Cable 

The speaker cable should be formed before mounting the 

shield cover as below. 

DC 

TX-RX unit 


F501 

GND 

PR9 

SQC 

PKD 

PR1 

PKS 

E 

+B 

R516 

Q503 

R518 

RF 

R524 

8T 

Q504 

PC 

VR601 

TEMP1 

8T 

TEMP2 

Locator 

Speaker 

cable 

5M 

IC252 

CNVSS 

RESET 

POWER 

BPF 

RXD TXD CV 

AFV 

ANT 

TX-RX unit 

Foil side 

+B E 

• Fuse 

To mount the fuse, the cable terminal direction must be as 

follow. 

• Except the E type models 

BPF 

TC401 

This side up 

Fuse 

This side up 

L301 

TC402 

Cable terminal 

Cable terminal 

■ Notes 

• EEPROM 

The tuning data (Deviation, Squelch, etc.) for the EEP- 

ROM, is stored in memory. When parts are changed, readjust 


• E type models 

• AF PA IC (IC252) 

How to mounting the IC252. 

Pin 1 marker 

IC252 

TX-RX UNIT 


Part name label face down 

23



PCB Section 

Item 

Condition 

1. Setting 1) Power supply voltage 

DC Power supply terminal : 13.8V 

Measurement 

Adjustment 

Test equipment Terminal Parts Method 

Specifications/ 

Remarks 

2. VCO lock 1) CH : TX high Digital voltmeter CV TC402 5.5V ± 0.2V 

voltage* 

2) CH : RX high TC401 5.5V ± 0.2V 

3) CH : TX low Check 0.5V or more 

4) CH : RX low 

3. IF coil 1) CH : RX center (Wide) SSG AFV L301 3.25~3.35V (DC) 

2) SSG output : –53dBm (501µV) Digital voltmeter 

Mod : 1kHz 

Dev : 3kHz 

* Adjustment of TX VCO lock voltage 

1. Remove R516, F501, R518 and R524 (all on component side). 

2. Remove PCB from chassis. 

3. Transmit and check voltage at [CV] point. 

Warning : Do not transmit if step “1.” is not complete. 

4. Adjust of voltage can be done by tuning TC402. 

Transmitter Section 

Item 

Condition 

Measurement 

Adjustment 



Remarks 

1. Frequency 1) CH : TX center Frequency counter ANT Encoder Adjust to center frequency Within ±50Hz 

2) Transmit knob 

2. Maximum 1) CH : TX high Power meter VR601 55W ± 1W 

power 2) Adjustment HEX value : FF 

alignment 3) Transmit 

3. High 1) CH : TX low Encoder Low : 50W ± 1.0W 

power CH : TX low’ knob Low’ : 60W 

CH : TX center 

Center : 60W 

CH : TX high’ 

High’ : 50W 

CH : TX high 

High : 50W 

2) Transmit 

4. Low 1) CH : TX low 25W ± 1.0W 

power CH : TX low’ 

CH : TX center 

CH : TX high’ 

CH : TX high 

2) Transmit 

5. DCS 1) CH : TX low (Wide) Modulation analyzer Adjust the waveform as below 

balance CH : TC center (Wide/Narrow) or Linear detector 

CH : TX high (Wide) 

(LPF : 3kHz) 

2) Transmit Oscilloscope 

24



Item 

Condition 

Measurement 

Adjustment 



Remarks 

6. MAX 1) CH : TX low (Wide) Modulation analyzer ANT Encoder ±4.0kHz (Wide) ± 100Hz (Wide) 

deviation CH : TX center (Wide/Narrow) or Linear detector MIC knob ±2.0kHz (Narrow) ± 50Hz (Narrow) 

CH : TX high (Wide) (LPF : 15kHz) According to the large +, – 

2) AG : 1kHz/50mV Oscilloscope 

3) Transmit AG 

AF V.M 

7. MIC 1) CH : TX center (Narrow) Check ± 1.2~1.9kHz 

sensitivity 2) AG : 1kHz/5.4mV (TM-271A) (Narrow) 

AG : 1kHz/2.4mV (TM-271E) 

3) Transmit 

8. CTCSS 1) CH : TX low (Wide) Modulation analyzer Encoder ±0.75kHz (Wide) ± 50Hz 

fine CH : TX center (Wide/Narrow) or Linear detector knob ±0.35kHz (Narrow) 

deviation CH : TX high (Wide) (LPF : 3kHz) 

2) Transmit Oscilloscope 

9. DCS fine 1) CH : TX low (Wide) ±0.75kHz (Wide) ± 50Hz (Wide) 

deviation CH : TX center (Wide/Narrow) ±0.35kHz (Narrow) ± 40Hz (Narrow) 

CH : TX high (Wide) 

2) Transmit 

10. DTMF 1) CH : TX center (Wide/Narrow) ±3.0kHz (Wide) ± 200Hz (Wide) 

fine 2) Transmit ±1.5kHz (Narrow) ± 100Hz (Narrow) 

deviation 

If normal power is not obtained, please follow the 

step below 

Open the shielding cover (upper), and screw 3 locations 

around ANT pin. 

1. Switch off the transceiver. 

Impedance of Final FET (Q504) and Drive FET (Q503) can 

be measured easily using DVM Ω mode. 

Normal condition – Gate : 20kΩ~50kΩ, Drain : 1MΩ~2MΩ 

The above impedance values are rough estimations. 

2. Switch on the transceiver. Check the voltage at F501 output 

point. 

The voltage is around 13.8V in receiving condition. The 

voltage will be 12.6V~ in transmitting condition. If found 

0V at this point then F501 is broken. 

3. Remove R516. 

4. Connect 50Ω load at the ANT location. 

Transmit and check current drain at High power mode. 

If the current drain is less than 1A, then Final FET is broken. 

If the current drain is less than 5.0A, short the Drive FET 

gate to ground, and check the current drain. 

If the current drain is not 0.1A less than the original value, 

then the Drive FET is broken. 

5. Check input power level at Drive FET gate location. 

Connect the wire to [RF] location. 

Transmit and check for power to be within the range of 

0.3W~0.6W. 

If power found is less than 0.3W, check the circuit before 

the Drive FET. 

Receiver Section 

Item 

Condition 

Measurement 

Adjustment 



Remarks 

1. Band pass 1) CH : RX low (Wide) SSG ANT Encoder Adjust to maximum SINAD. SINAD 

tuning CH : RX center (Wide/Narrow) Oscilloscope EXT. SP knob : 12dB or higher 

CH : RX high (Wide) 

AF V.M 

2) SSG output Distortion meter 

: –121dBm (0.2µV) (Wide) 

: –119dBm (0.25µV) (Narrow) 

Mod : 1kHz 

Dev : ±3.0kHz (Wide) 

Dev : ±1.5kHz (Narrow) 

25



Item 

Condition 

Measurement 

Adjustment 


2. Squelch 1) CH : RX low (Wide) SSG ANT Encoder Adjust to open the squelch 

tight CH : RX center (Wide/Narrow) Oscilloscope EXT. SP knob 


AF V.M 

2) SSG output Distortion meter 

: –115dBm (0.4µV) (Wide/Narrow) 

Mod : 1kHz 




Remarks 

3. Squelch 1) CH : RX low (Wide) 

open CH : RX center (Wide/Narrow) 


2) SSG output 

: –125dBm (0.126µV) (Wide/Narrow) 

Mod : 1kHz 



4. RSSI 1) CH : RX center (Wide) Push RSSI value writing is perwriting 

2) SSG output : –53dBm (501µV) encoder formed by the “Squelch 

Mod : 1kHz knob open” item (center wide). 

Dev : ±3.0kHz 

SSG output level is changed 

and adjusted after SQ 

adjustment. 

This adjustment should not 

turn the encoder. 

5. S-meter 1) CH : RX center (Wide) 

S1 2) SSG output : –118dBm (0.28µV) 

Mod : 1kHz 


6. S-meter 1) CH : RX center (Wide) 

full scale 2) SSG output : –96dBm (3.54µV) 

Mod : 1kHz 


26

TERMINAL FUNCTION 



CN No. Pin No. Name Function 

CN1 1 ENC A Encoder A 

2 CM Microphone Key Check 


CN5 1 INT SP Internal speaker 

2 GND Ground 

3 ENC B Encoder B 

4 MIC KEY Microphone Key 

5 DI Data Out from LCD 

6 CE Chip Enable for LCD 

7 CL Clock for LCD 

8 DO Data transfer to LCD 

9 5C 5V DC power supply 

10 8C 8V DC supply 

11 VOL Volume 

12 POWER Power Key 

13 RXD RXD 

14 BRI Brightness Control 

15 PTT PTT 

16 GND Ground 

17 GND Ground 

18 MIC Microphone 

CN2 1 GND Ground 

2 SQC Squelch Signal 

3 PKS Transmission Control 

4 PR1 1200bps Receive Data 

5 PR9 9600bps Receive Data 

6 GND Ground 

7 PKD Transmission Modulation 

DISLAY UNIT (X54-3450-10) 


CN1 1 ENC A Encoder A 

2 CM Microphone Key Check 

3 ENC B Encoder B 

4 MIC KEY Microphone Key 

5 DI Data Out from LCD 

6 CE Chip Enable for LCD 

7 CL Clock for LCD 

8 DO Data transfer to LCD 

9 5C 5V DC power supply 

10 8C 8V DC supply 

11 VOL Volume 

12 POWER Power Key 

13 RXD RXD 

14 BRI Brightness Control 

15 PTT PTT 

16 GND Ground 

17 ME ME 

18 MIC Microphone 

27

1 

A 

B 

C 

D 

E 

TM-271A/271E PC BOARD 

F 

G 

H 

I 

J 

DISPLAY UNIT (X54-3450-10) Component side view (J72-0905-09) 

2 

3 

VR1 

POWER/VOL 

D27 D26 

D25 

D28 D29 

4 

D21 

D20 

D19 

D22 

D23 

LCD 

5 

6 

HOOK 

ME 

GND 

MBL 

CM 

MIC 

PTT 

8C 

J1 

MIC JACK 

COM3 

COM2 

COM3 

COM0 

SEG31 

SEG30 

SEG29 

SEG28 

SEG27 

SEG26 

SEG25 

SEG24 

SEG23 

SEG22 

SEG21 

SEG20 

SEG19 

SEG18 

SEG17 

SEG16 

SEG15 

SEG14 

SEG13 

SEG12 

SEG11 

SEG10 

SEG9 

SEG8 

SEG7 

S G 

CALL VFO MR 

D2 

D3 

7 

8 

DISPLAY UNIT (X54-3450-10) Foil side view (J72-0905-09) 

9 

10 

MBL 

GND 

ME 

HOOK 

8C 

PTT 

MIC 

CM 

C24 

C39 

D31 

C40 

R55 

11 

32 

33 

17 

16 

C4 

IC3 

C31 

C32 

12 

R52 

48 1 

49 64 

C33 

13 

C16 

C15 

R21 

R22 

R23 

C30 

R51 

R53 

R46 

C38 

C36 

CP1 

C19 

R25 

L1 

C27 

14 

28

J K L M N O P Q R S 

PC BOARD TM-271A/271E 

1 


D29 

D30 

R47 

R48 

D23 

D24 

SEG9 

SEG8 

SEG7 

SEG6 

SEG5 

SEG4 

SEG3 

SEG2 

SEG1 

SEG0 

S1 

ENCODER 

D4 

Ref. No. Address 

D2 6F 

D3 6J 

D4 5O 

D19 4G 

D20 4P 

D21 4E 

D22 4I 

D23 4J 

D24 4K 

D25 3G 

D26 3F 

D27 3E 

D28 3I 

D29 3J 

D30 3K 

2 

3 

4 

5 

D3 

REV 

FUNCTION 

J72-0905-09 


Layer 1 

Layer 2 

Foil side 

6 

7 


Q6 

Q10 

C25 


IC3 11H 

Q6 10M 

Q9 11M 

Q10 10N 

Q12 10N 

D31 9C 

8 

9 

C32 

L1 

C27 

CN1 

ENCA 

CM 

ENCB 

MIC KEY 

DI 

CE 

CL 

DO 

5C 

8C 

VOL 

POWER 

RXD 

BRI 

PTT 

GND 

ME 

MIC 

1 

18 

R54 

R49 

R50 

R41 

E 

Q9 C 

B 

C34 

C35 

C22 

R43 

R26 

R44 

R45 

23 

1 5 

Q12 

R42 

R8 

R10 

J72-0905-09 

Layer 1 

Layer 2 


Foil side 

10 

11 

12 

13 

29 

14

1 

A 

B 

C 

D 

E 


F 

G 

H 

I 



1 



2 

3 

4 

5 

6 

7 

HOOK 

ME 

GND 

MBL 

CM 

MIC 

PTT 

8C 

VR1 

POWER/VOL 

J1 

MIC JACK 

D27 D26 

D25 

D28 D29 D30 

R47 

R48 

D21 

D20 

D19 

D22 D23 D24 

LCD 

COM3 

COM2 

COM3 

COM0 

SEG31 

SEG30 

SEG29 

SEG28 

SEG27 

SEG26 

SEG25 

SEG24 

SEG23 

SEG22 

SEG21 

SEG20 

SEG19 

SEG18 

SEG17 

SEG16 

SEG15 

SEG14 

SEG13 

SEG12 

SEG11 

SEG10 

SEG9 

SEG8 

SEG7 

SEG6 

SEG5 

SEG4 

SEG3 

SEG2 

SEG1 

SEG0 

CALL VFO MR REV 

D2 

D3 

S1 

ENCODER 

FUNCTION 

D4 

J72-0905-09 

Layer 1 

Layer 2 


D2 

D3 

D4 

D19 

D20 

D21 

D22 

D23 

D24 

D25 

D26 

D27 

D28 

D29 

D30 

6F 

6J 

5O 

4G 

4P 

4E 

4I 

4J 

4K 

3G 

3F 

3E 

3I 

3J 

3K 


Foil side 

2 

3 

4 

5 

6 

7 

8 



8 

9 

10 

11 

12 

13 

MBL 

GND 

ME 

HOOK 

8C 

PTT 

MIC 

CM 

C24 

C39 

D31 

C4 

C40 

R55 

C15 

C16 

R21 

R22 

R23 

R52 

C30 

R51 

32 

33 

C38 

C36 

IC3 

17 

16 

48 1 

49 64 

R53 

R46 

CP1 

C19 

R25 

C33 C31 

C32 

L1 

C27 

CN1 

ENCA 

CM 

ENCB 

MIC KEY 

DI 

CE 

CL 

DO 

5C 

8C 

VOL 

POWER 

RXD 

BRI 

PTT 

GND 

ME 

MIC 

1 

18 

R54 

R49 

R50 

R41 

Q6 

E 

C 

B 

Q9 

C34 

C35 

C22 

C25 

R26 

R43 

R44 

R45 

23 

1 5 

Q12 

Q10 

R42 

R8 

R10 

J72-0905-09 

Layer 1 

Layer 2 


IC3 11H 

Q6 10M 

Q9 11M 

Q10 10N 

Q12 10N 

D31 9C 


Foil side 

9 

10 

11 

12 

13 

14 

28 29 

14

I 

1 

2 

A 

B 

J1 

EXT. SP 

C 

D 


TX-RX UNIT (X57-685X-XX) Component side view (J72-0906-09) 

0-10 : TM-271A (K) 0-21 : TM-271A (M2) 0-22 : TM-271A (M3) 

0-23 : TM-271A (M4) 2-71 : TM-271E (E) 

E 

F 

G 

H 

I 

J 

3 

C527 

C528 

DC 

4 

C29 

C28 

C530 

C529 

F501 

C531 

+ 

F1 

E 

+B 

5 

S 

L505 

G 

Q503 

D 

C533 

6 

GND 

R524 

S 

PR9 

R525 

C536 

7 

8 

SQC 

PKD 

PR1 

PKS 

R119 

CN5 

E 

SP 

C519 

C517 

C518 

L503 L504 

C516 

R516 

RF 

R518 

C522 

R520 

R519 

R523 

D503 

R527 

R521 

C559 

C525 

R529 

8T 

C560 

R 

5 

IC5 

8 

R5 

1 

9 

10 

11 

12 

13 

C44 + 

C51 + 

C50 C52 

IC252 

10 

Q36 

O 

G IC33 

C49 

C45 + 

R35 

R36 

E 

Q35 C 

B 

C281 

R280 

C277 

C278 

C273 

R276 

R37 

C10 

Q255 

R279 

R277 

R278 

C274 

CNVSS 

R101 

1 

R82 

5M 

C276 

Q254 RESET 

C275 

R125 

C83 

C82 

C271 

R273 

CN2 

CN1 

R272 

D251 

PKD 7 

GND 

PR9 

PR1 

PKS 

SQC 

GND 1 

R236 

R122 

R121 

R120 

17 

ENCA 

ENCB 

DI 

CL 

5C 

VOL 

RXD 

PTT 

ME 

2 CM 

MIC KEY 

CE 

DO 

8C 

POWER 

BRI 

GND 

MIC 

18 

C20 

C16 C19 

C17 C18 

D5 

R3 

C235 

R106 

R105 

D6 

R118 

C15 

R2 

C272 

R274 

R275 

POWER 

R81 

C13 

L201 

R1 

R200 

R237 

R248 

RXD 

TXD 

D4 

D3 

C201 

R271 

C249 

+ 

C152 

R269 

C267 

C250 

C270 + 

C151 

R151 

R152 

C268 

C514 

R250 

R268 D S G 

D S G 

Q253 Q252 

R249 

R246 

C425 + 

C424 + 

+ 

C423 

R422 CV 

R420 

R421 

R419 

Q402 

R414 

R418 

Q403 

C422 

C417 

R401 

R402 

R403 

C416 

R410 R411 

R413 

C475 

C476 

C402 

C401 

D402 

R412 

IC204 

4 3 

5 1 

4 3 

5 1 

IC205 

C403 

D401 

C414 R409 

C413 

11 10 

IC401 

20 1 

C410 

+ 

L404 

C411 

R408 

C412 

+ 

C400 

C408 

14 

30

R527 

R521 

C413 

R524 

C536 

10 

C525 

R409 

1 

C559 

L404 

R408 


R529 

C410 

+ 

C411 

C412 

+ 

R530 

C400 

C408 

R531 

5 4 

IC501 

8 1 

8T 

R528 

C560 

L403 

G 

R533 

R532 

R407 

R605 

R606 

X401 




PC 

C406 

Q302 

Q504 

C473 

L401 

R323 

D608 

+ 

C404 

R406 

C409 

L303 

L304 

C323 

R607 

R404 

+ 

C313 

C322 

R322 

C324 

BPF 

VR601 

TH301 

R355 

C314 

D 

R312 

C541 

C542 

C356 

R324 

C321 

R315 

C310 

L302 

TH97 

C97 

R314 

C312 

C311 

TEMP1 

+ C164 

+ C442 

R305 

R313 

R311 

C319 

R166 

R165 

R164 

C355 

R304 

C304 

C305 

C574 

C576 

R306 

C549 

24 

1 

R303 

L506 

C303 

C161 

C163 

C353 

R352 

IC161 

C354 

C546 

C545 

L507 

L508 

R162 

AFV 

R302 

R354 

Q351 

R351 

C351 

C165 

R353 

12 13 

C550 

R161 

C552 

C553 

+ C162 

C204 + 

D201 

R316 

R319 

R350 

D202 

R320 

R349 

C350 

R317 

C205 

R204 

C202 

R203 

C315 

C316 R318 

C317 

C128 

8T 

R206 

D302 


R205 

C554 

Q201 

C615 

C613 

C602 

L509 

Q354 

G 

S D 

C203 

R213 

D303 

C318 

C605 

C206 

D602 

C207 

R211 

R212 

C211 

R227 

R321 

R207 

C603 

C212 

C226 

C233 + 

C225 + 

C218 + 

C623 

TH98 

C98 

C555 

C220 + 

C208 

R228 

TEMP2 

R219 

R218 

R221 

R220 

1 8 

IC201 

4 5 

1 8 

IC202 

4 5 

C227 

R247 

C228 

R233 C231 

C232 R232 

7 

8 

+ 

IC203 

R226 

C608 

R234 

C614 

C222 

D603 

R224 

C209 

R209 

C210 

R210 

C213 

R214 

R215 

C215 

C214 

R216 

C230 

R229 

R230 

R231 

1 

14 

C216 

C389 

R379 

R208 

R217 

R222 

+ C217 

R225 

J72-0906-09 


IC33 12B 

IC161 1N 

IC201 10P 

IC202 11P 

IC203 12P 

IC204 10I 

IC205 11I 

IC252 10B 

IC401 12J 

IC501 8J 

Q35 13C 

Q36 12C 

Q201 11O 

Q252 12F 

Q253 12F 

Q254 11D 

Q255 10D 

Q302 13K 

Q351 12N 

Q354 9O 

Q402 12H 

Q403 13H 

Q503 6G 

Q504 5K 

D3 12E 

D4 12E 

D5 11E 

D6 11E 

D201 11O 

D202 10O 

D251 9E 

D302 12O 

D303 12O 

D401 12J 

D402 13I 

D503 8J 

D602 7P 

D603 7Q 

D608 8L 

Layer 1 

Layer 2 

Layer 3 

Layer 4 


Foil side 

31 

1 

2 

3 

4 

5 

6 

7 

8 

9 

10 

11 

12 

13 

14

I 

1 

2 

3 

4 

5 

6 

7 

8 

9 

10 

11 

12 

13 

14 

A 

C50 

C44 + 

C51 + 

C52 

B 


IC33 

O 

G 

C49 

C45 + 

J1 

EXT. SP 

E 

C 

Q35 

Q36 

B 

C 

R280 

C273 

R276 

R279 

R277 

R278 

C274 

C275 

D 




GND 

PR9 

SQC 

PKD 

IC252 

PR1 

R35 

1 

10 

R36 

F1 

PKS 

R119 

C281 

C277 

C278 

R37 

C10 

Q255 

CNVSS 

R101 

1 

R82 

5M 

R125 

E 

C276 

Q254 RESET 

C83 

C82 

C271 

R273 

CN2 

CN1 

C29 

CN5 

R272 

D251 

C28 

PKD 7 

GND 

PR9 

PR1 

PKS 

SQC 

GND 1 

E 

R236 

R122 

R121 

R120 

17 

ENCA 

ENCB 

DI 

CL 

5C 

VOL 

RXD 

PTT 

ME 

+B 

2 CM 

MIC KEY 

CE 

DO 

8C 

POWER 

BRI 

GND 

MIC 

18 

E 

C20 

D5 

SP 

C19 

C18 

C16 

C17 

C235 

R106 

R105 

D6 

R118 

C15 

C272 

R274 

R275 

POWER 

R81 

C13 

R3 

R2 

R237 

R248 

RXD 

L201 

R1 

R200 

TXD 

D4 

D3 

C201 

R268 

F 

R271 

C249 

+ 

C152 

R269 

C267 

C250 

C270 + 

C151 

C268 

C519 

C517 

C518 

R151 

R152 

R250 

C514 

D S D S 

G G 

Q253 Q252 

L503 L504 

C516 

G 

R516 

R249 

R246 

G 

RF 

S 

Q503 

S 

R518 

C522 

C527 

C528 

C425 + 

C424 + 

+ 

C423 

R420 

H 

C530 

C529 

R520 

R519 

D 

R422 CV 

R421 

R419 

Q402 

DC 

R414 

F501 

R418 

Q403 

C422 

C417 

C416 

R410 R411 

L505 

R413 

C475 

I 

C533 

R401 

R402 

R403 

C402 

C401 

D402 

R412 

C531 

+ 

IC204 

4 3 

5 1 

4 3 

5 1 

IC205 

C476 

R525 

R523 

C403 

D401 

11 

20 

D503 

C414 R409 

IC401 

R527 

R521 

C413 

R524 

C536 

10 

C525 

1 

C559 

L404 

R408 


R529 

C410 

C411 

C412 

C400 

+ 

+ 

R530 

C408 

R531 

5 4 

IC501 

8 1 

8T 

R528 

C560 

L403 

G 

R533 

R532 

R407 

R605 

R606 

X401 

PC 

C406 

Q302 

Q504 

C473 

L401 

R323 

D608 

+ 

C404 

R406 

C409 

L303 

L304 

C323 

R607 

R404 

+ 

C313 

VR601 

D 

C322 

TH301 

R312 

R322 

C324 

BPF 

R355 

C314 

C541 

C542 

C356 

L302 

C97 

+ C442 

R305 

R315 

R304 

R314 

C304 

C312 

C305 

C311 

C310 

R313 

R311 

R324 

C321 

TH97 

TEMP1 

+ C164 

C319 

R166 

R165 

R164 

C355 

C574 

C576 

R306 

C549 

24 

1 

R303 

L506 

C303 

C161 

C163 

C353 

R352 

IC161 

C354 

C546 

C545 

L507 

L508 

R162 

AFV 

R302 

R354 

Q351 

R351 

C351 

C165 

R353 

12 13 

C550 

R161 

C552 

C553 

+ C162 

C204 + 

D201 

R316 

R350 

D202 

R319 

R320 

R349 

C350 

R317 

C205 

C202 

R203 

C315 

C316 R318 

C317 

30 31 

C128 

8T 

R206 

D302 





R205 

C554 

R204 

Q201 

C615 

C613 

C602 

L509 

Q354 

G 

S D 

C203 

R213 

D303 

C318 

C605 

C206 

D602 

C207 

R211 

R212 

R227 

R321 

R207 

C211 

C603 

C212 

C226 

C233 + 

C225 + 

C218 + 

TH98 

C555 

C623 

C220 + 

C208 

R228 

C227 

C98 

TEMP2 

R247 

R219 

R218 

R221 

R220 

1 8 

IC201 

4 5 

1 8 

IC202 

4 5 

C228 

R233 C231 

C232 R232 

7 

8 

+ 

IC203 

R226 

C608 

R210 

R234 

R216 

R229 

1 

14 

C614 

C222 

C209 

D603 

C213 

R230 

C389 

R379 

R224 

R208 

R209 

R214 

R215 

C215 

C214 

C230 

R231 

C210 

C216 

R217 

R222 

+ C217 

R225 

J72-0906-09 


IC33 12B 

IC161 1N 

IC201 10P 

IC202 11P 

IC203 12P 

IC204 10I 

IC205 11I 

IC252 10B 

IC401 12J 

IC501 8J 

Q35 13C 

Q36 12C 

Q201 11O 

Q252 12F 

Q253 12F 

Q254 11D 

Q255 10D 

Q302 13K 

Q351 12N 

Q354 9O 

Q402 12H 

Q403 13H 

Q503 6G 

Q504 5K 

D3 12E 

D4 12E 

D5 11E 

D6 11E 

D201 11O 

D202 10O 

D251 9E 

D302 12O 

D303 12O 

D401 12J 

D402 13I 

D503 8J 

D602 7P 

D603 7Q 

D608 8L 

Layer 1 

Layer 2 

Layer 3 

Layer 4 


Foil side 

1 

2 

3 

4 

5 

6 

7 

8 

9 

10 

11 

12 

13 

14

1 

A 

B 

C 


TX-RX UNIT (X57-685X-XX) Foil side view (J72-0906-09) 



D 

E 

F 

G 

H 

I 

J 

2 

3 

R800 

ANT 

L605 

4 

C616 

R601 

C611 

C610 

D607 

5 

6 

C617 

C607 

R602 

C606 

D606 

L602 

L603 

C544 C543 

L601 

7 

8 

C387 

C390 

R376 

C391 

C388 

D605 

C386 

D354 

C385 

L357 

C557 

C556 

R526 

C558 

9 

C380 

R375 

L356 

C381 

10 

C379 

R374 

R373 

R371 

C383 

C377 

R370 

Q353 

G1 S 

G2 D 

C378 

R372 

C382 

R369 

C376 

R368 

C374 

C373 

L355 

C372 

R366 

C375 

R367 

C371 

L354 

C370 

C368 

C369 

D351 

R364 R365 

C384 

R361 

L604 

D353 

D352 

C367 

C358 

C362 

C357 

C363 

R363 

R362 C359 

C364 R358 

L351 

Q352 

G1 S 

G2 D 

L352 

R356 

C360 

R359 

R360 

R444 

C471 C366 

L422 

C467 

C468 

C361 

C501 R503 C503 

R501 

C502 

R502 

R504 

R505 

C504 

D501 

R506 

B 

C 

E 

Q501 

L501 

R509 

R510 

C505 

C506 

R507 

C507 

C511 

C509 

D50 

BPF 

D409 

11 

12 

13 

R254 

R253 

C254 

R255 

R256 

C255 

C251 

R257 

C256 

C265 

C253 

R264 

R263 

R252 

C252 

8 

Q251 

R251 

R266 

C264 

C262 

7 

R259 

C266 

R265 

C263 

CF301 

IC251 

R262 

14 1 

C261 

R258 

C260 R261 

C257 

R260 

C258 

C259 

CF302 

R301 

+ 

C301 

R310 

C307 

C306 

XF351 

C302 R325 C326 

11 

20 

IC301 

10 

1 

Q301 

R308 

R309 

C309 

C308 

L301 

D301 

C463 

R441 

L420 L421 

Q411 

R439 

C465 

C466 

C462 

C460 

R442 

L419 

C464 

R437 C459 

L423 

R443 

C461 

R440 

R438 

C457 

C456 

C421 

R432 

R433 

R416 

D408 

Q408 

5 1 

3 2 

C418 

C449 

L417 

R415 

Q440 

C448 

R431 

R417 

5 4 

C451 

IC402 

8 1 

C450 + 

C458 C474 

S 

D 

Q407 G 

Q404 

C455 

R423 

L410 

C431 

S 

G 

C430 

Q405 

R430 

C432 

L418 

C453 

R436 

R424 R425 

C454 

R434 

D 

C429 

C428 

R435 

L409 

R427 

R426 

TC401 

L408 

C439 

R429 

C427 

L416 

C444 

L407 

C4 

L4 

C 

Q410 C440 

C452 Q406 

S 

C441 

G 

L415 D 

L414 

C438 

C437 

14 

32

Q501 

R426 

R509 

R507 

C507 

C511 

TC401 


C426 L406 

L408 

R428 D407 

R427 L416 C436 

L405 

L413 L411 

0 C440 

D406 

2 Q406 

S 

1 

G 

5 D 

C439 

R429 

L414 

C427 

C444 

C509 

L501 

D502 

L407 

C438 

C437 

R511 




D404 

R522 

C510 

C512 

C434 

C435 

L412 

TC402 

D403 

Q502 

B 

C 

E 

R512 

D405 

C526 

C515 

L502 

R513 

C513 

R39 

R40 

R514 

1 

5 

1 

IC66 

8 

4 5 

R94 

R93 

IC35 

3 4 

C66 

R91 

R92 

C55 

C56 

R109 

R111 

R41 

5 

1 

R70 

R110 

R114 

R38 

IC34 

3 4 

25 

26 

C53 

C54 

R104 

R103 

SGD Q86 

D 

G 

C87 

C101 

D31 

C30 

+B E 

S 

Q87 

C88 C89 

R87 

R102 

R123 R126 

C102 

C14 

X86 

IC101 

R86 

C90 

R6 

R8 

C34 

C282 

1 

100 

50 

76 

51 75 


R281 

+ 

+ 

+ C279 

C104 

L101 

D2 

+ 

C280 

R124 

D1 

R127 

R5 

R7 

C283 

R63 

R4 

IC32 

D61 

Q61 

C33 

R61 

I 

G 

O 

E 

Q34 

R34 

C61 

R31 

R33 

C40 

C42 

D62 

C36 

C37 

Q31 

C 

C39 

Q33 

R62 

C35 

B 

+ C41 

+ C43 

Q32 

R32 

I 

C38 

O 

D32 

IC31 

G 

J72-0906-09 


IC31 12Q 

IC32 13O 

IC34 13M 

IC35 13L 

IC66 11L 

IC101 11N 

IC251 12B 

IC301 12E 

IC402 13G 

Q31 5P 

Q32 4P 

Q33 12P 

Q34 12P 

Q61 4P 

Q86 10N 

Q87 10N 

Q251 11B 

Q301 13E 

Q352 10F 

Q353 10B 

Q404 12I 

Q405 12I 

Q406 13J 

Q407 12I 

Q408 11H 

Q410 12I 

Q411 12G 

Q440 12H 

Q501 10I 

Q502 10K 

D1 12O 

D2 11O 

D31 4N 

D32 5Q 

D61 4P 

D62 4P 

D301 13F 

D351 10D 

D352 10C 

D353 9B 

D354 8B 

D403 11K 

D404 11J 

D405 13K 

D406 12K 

D407 12K 

D408 12H 

D409 10G 

D501 10I 

D502 10J 

D605 7B 

D606 5B 

D607 4B 


Layer 1 

Layer 2 

Layer 3 

Layer 4 

Foil side 

33 

1 

2 

3 

4 

5 

6 

7 

8 

9 

10 

11 

12 

13 

14

1 

2 

3 

4 

5 

6 

7 

8 

9 

10 

11 

12 

13 

14 

A 

R254 

R253 

C254 

R255 

R256 

C255 

R257 

C256 

C617 

C251 

C253 

R601 

C607 

R264 

C616 

R602 

R263 

R252 

C252 

C611 

C606 

R251 

B 


C265 

R266 

C264 

C262 

C610 

R259 

C266 

R265 

C263 

C259 

R800 

ANT 

IC251 

R262 

14 1 

C261 

R258 

C260 R261 

C257 

R260 

C258 

CF301 

C 




C387 

C379 

C390 

R376 

L357 

R374 

R373 

R371 

L605 

C391 

D607 

D606 

C388 

D605 

C386 

D354 

C385 

8 

C380 

R375 

C383 

C377 

R370 

Q353 

G1 S 

G2 D 

C378 

R372 

Q251 

L602 

L601 

D353 

C382 

R369 

7 

C384 

C376 

R368 

L604 

L603 

L356 

C374 

C373 

L355 

C381 

D352 

C372 

R366 

C557 

C375 

R367 

C371 

C556 

R526 

L354 

C558 

CF302 

D 

C370 

C368 

C369 

D351 

R364 R365 

C367 

R301 

+ 

C301 

E 

R310 

C307 

C306 

Q301 

R361 

XF351 

C302 R325 C326 

11 

20 

IC301 

10 

C358 

R308 

C362 

C357 

C363 

R309 

C309 

C308 

F 

C544 C543 

R363 

R362 C359 

C364 R358 

1 

L351 

L301 

Q352 

G1 S 

G2 D 

D301 

L352 

BPF 

R356 

C463 

C360 

R441 

G 

R444 

D409 

C460 

C467 

C471 C366 

L422 

R359 

R360 

C361 

C468 

C457 

C456 

H 

C501 

R432 

C421 

R416 

R433 

R501 

D408 

C502 

C449 

R502 

R415 

R503 

R504 

C448 

R431 

C503 

R505 

C455 

R423 

I 

C504 

D501 

R506 

R510 

C505 

C429 

Q405 

R430 

C506 

C428 

Q501 

TC401 

C432 

L418 

C453 

R436 

R424 R425 

R426 

R429 C439 

L414 

C444 

B 

C 

E 

R507 

R509 

C507 


C511 

C427 

C509 

L501 

R511 

R522 

C510 

C512 

C434 

C435 

TC402 

R512 

Q502 

B 

C 

E 

Q408 

C465 

5 1 

R443 

C431 

C466 

3 2 

D404 

C462 

L409 

C461 

C426 L406 

R440 

L408 

Q411 

R428 D407 

R438 

Q404 C430 

R439 

R427 L416 C436 

L405 

R442 

C418 R417 

L419 

L413 L411 

C464 

C454 

Q410 C440 

D406 

R437 C459 

C452 Q406 

S 

5 4 

C451 

C441 

G 

IC402 

R435 L415 D 

8 1 

C450 + 

R434 

C438 

C458 C474 

C437 

L420 L421 

L423 

L417 

Q440 

S 

D 

Q407 G 

L410 

S 

G 

D 

D502 

L407 




L412 

D403 

D405 

C526 

C515 

L502 

R513 

C513 

R39 

R40 

R514 

1 

5 

1 

IC66 

8 

4 5 

R94 

R93 

IC35 

3 4 

C66 

R91 

R92 

C55 

C56 

R41 

R109 

R111 

5 

1 

R70 

R110 

R114 

R38 

IC34 

3 4 

25 

26 

C53 

C54 

R104 

R103 

Q86 

C87 

C101 

D31 

SGD D 

G 

C88 

R102 

R123 

C102 

C30 

+B E 

C14 

X86 

S 

IC101 

C89 

R126 

Q87 

R86 

R87 

C90 

R6 

R8 

C34 

C282 

1 

100 

50 

76 

51 75 


32 33 

R281 

+ 

+ 

+ C279 

C104 

L101 

D2 

+ 

C280 

R124 

D1 

R127 

R5 

R7 

C283 

R63 

R4 

D61 

C33 

IC32 

I 

G 

O 

Q61 

R61 

E 

Q34 

R34 

C61 

R31 

C36 

C37 

R33 

C40 

C42 

D62 

Q31 

C 

C39 

Q33 

R62 

C35 

B 

+ C41 

+ C43 

Q32 

R32 

I 

C38 

O 

D32 

IC31 

G 

J72-0906-09 


IC31 12Q 

IC32 13O 

IC34 13M 

IC35 13L 

IC66 11L 

IC101 11N 

IC251 12B 

IC301 12E 

IC402 13G 

Q31 5P 

Q32 4P 

Q33 12P 

Q34 12P 

Q61 4P 

Q86 10N 

Q87 10N 

Q251 11B 

Q301 13E 

Q352 10F 

Q353 10B 

Q404 12I 

Q405 12I 

Q406 13J 

Q407 12I 

Q408 11H 

Q410 12I 

Q411 12G 

Q440 12H 

Q501 10I 

Q502 10K 

D1 12O 

D2 11O 

D31 4N 

D32 5Q 

D61 4P 

D62 4P 

D301 13F 

D351 10D 

D352 10C 

D353 9B 

D354 8B 

D403 11K 

D404 11J 

D405 13K 

D406 12K 

D407 12K 

D408 12H 

D409 10G 

D501 10I 

D502 10J 

D605 7B 

D606 5B 

D607 4B 


Layer 1 

Layer 2 

Layer 3 

Layer 4 

Foil side 

1 

2 

3 

4 

5 

6 

7 

8 

9 

10 

11 

12 

13 

14

TM-271A/271E SCHEMATIC DIAGRAM 

34 

7 

6 

5 

4 

3 

2 

1 

A B C D E 

-t 

-t 

C422 

470p 

C408 

22p 

R427 

100k 

C218 

10u6.3 

C444 

470p 

R422 

10k 

C438 

0.5p 

C437 

470p 

C212 

1200p 

R161 

1.2k 

C453 

220p 

C164 

10u6.3 

C88 

4p 

C232 

1000p 

R200 

680 

R227 

22k 

C220 

4.7u6.3 

C163 

1000p 

C441 

0.5p 

TC401 

10p 

R416 

470 

R229 

680k 

C215 

0.1u 

C432 

0.3p 

R166 

1k 

8C 

C213 

3300p 

5C 

C231 

1000p 

C233 

4.7u6.3 

L404 

R162 

1.5k 

R419 

2.7k 

R218 

82k 

C87 

3p 

R208 

1.5k 

C450 

22u10 

R211 

82k 

R426 

47k 

R233 

6.8k 

C227 

0.01u 

R230 

220k 

R421 

1.5k 

5C 

R207 

* 

D404 

MA2S304 

D403 

MA2S304 

C428 

470p 

5M 

C421 

470p 

C410 

10u6.3 

C448 

470p 

R203 

100k 

R412 

10k 

D405 

MA2S304 

2SC4919 

Q201 

C205 

0.1u 

2SC4738(GR) 

Q403 

2SA1832(GR) 

Q402 

D406 

MA2S304 

R212 

82k 

L416 

C403 

100p 

L201 

R205 

820 

R409 

100k 

D401 

MA2S111 

C409 

0.1u 

C436 

0.75p 

R165 

1k 

R425 

47k 

R435 

100 

R415 

0 

C161 

1000p 

L405 

C414 

0.1u 

D201 

DAN222 

5C 

C452 

470p 

5M 

R86 

0 

C230 

0.1u 

R436 

120k 

R164 

1k 

C402 

100p 

C208 

0.01u 

C207 

* 

IC201 

NJM2100V 

1 

2 

3 

4 5 

6 

7 

8 

V+ 

R430 

220 

TC402 

10p 

C455 

3p 

R87 

1k 

R434 

0 

R410 

8.2k 

C416 

1000p 

R217 

220k 

C413 

0.01u 

D202 

1SS372 

C228 

10u6.3 

R413 

10k 

C411 

0.1u 

C204 

2.2u10 

R220 

15k 

C203 

* 

C418 

1000p 

C425 

0.1u35 

R221 

15k 

8C 

R407 

1.5k 

C89 

4p 

R232 

9.1k 

C423 

0.047u35 

C217 

10u6.3 

C430 4.5p 

R417 

220k 

L417 

R401 

1k 

C406 

1000p 

R231 

120k 

R433 

4.7k 

8C 

C214 

150p 

R411 

5.6k 

R402 

1k 

R213 

330k 

R214 

68k 

R414 

470 

R403 

1k 

C451 

470p 

C424 

1u16 

IC401 

MB15A02 

11 

12 

13 

14 

15 

16 

17 

18 

19 

20 

R219 

180k 

C210 

0.1u 

C454 

6p 

C417 

1000p 

R228 

10k 

L403 

10u 

R226 

100k 

D408 

MA2S111 

D402 

HZU5ALL 

C401 

100p 

C206 

* 

R215 

68k 

C201 

0.1u 

C90 

3p 

C226 

4700p 

C431 

5p 

C202 

1000p 

C211 

820p 

C404 

15u6.3 

C162 

4.7u6.3 

R216 

270k 

R432 

1k 

R408 

10 

R204 

* 

C449 

470p 

R418 

1k 

8C 

R431 

100k 

R206 

100 

C225 

1u16 

R404 

10k 

R209 

240k 

R420 

1k 

R225 

150k 

C412 

10u6.3 

R210 

18k 

C442 

10u6.3 

R428 

47k 

CN2 

1 

2 

3 

4 

5 

6 

7 

D5 

DA221 

C16 470p 

D6 

DA221 

C19 470p 

C17 470p 

C18 470p 

C20 470p 

IC205 

BU4S66 

1 I/O 

2 O/I 

3 VSS 4 

5 

R237 

0 

R236 

10k 

C235 

1u 

PR9 

PR1 

PKS 

SQC 

5C 

R234 

0 

IC204 

BU4S66 

1 

I/O 

2 

O/I 

3 

VSS 

4 

CONT 

5 

VDD 

C222 

0.1u 

R224 

560 

PKD 

PKD 

5C 

R93 

6.8k 

R94 

10k 

TH98 

100k 

C97 

1000p 

TH97 

100k 

C98 

1000p 

C216 

39p 

IC161 

M62363FP 

1 

2 

3 

4 

5 

6 

7 

8 

9 

10 

11 

12 13 

14 

15 

16 

17 

18 

19 

20 

21 

22 

23 

24 

R222 

10k 

IC203 

BA10324AFV 

VCC 

VEE 

C209 

68p 

C165 

1u 

X401 

L77-1944-05 

R406 

10k 

C475 

1000p 

C476 

1000p 

C473 

1000p 

C400 

0.1u 

L406 

270n 

L407 

270n 

C426 

30p 

L409 

27u 

L408 

33n 

C427 

8p 

L410 

27u 

R423 

220 

C429 

1p 

R429 

270 

L411 

270n 

C434 

150p 

L413 

47n 

C435 

10p 

L412 

270n 

L414 

27u 

C439 

10p 

R424 

100 

L415 

27u 

C440 

11p 

L401 

L418 

33n 

D407 

1SV278 

IC202 

BA10358FV 

1 

2 

3 

4 

5 

6 

7 

8 

VCC 

SPLATTER FILTER 

OR GATE 

W/NI(EVOL1) 

5C 

RX VCO 

TX VCO 

CV 

VOTAGE 

DROPPED 

CHARGE PUMP 

MIC AMP/ 

IDC 

TCXO 

IDC 

AGC 

BUFFER AMP 

CK(CPU54) 

DT(CPU53) 

DT(CPU53) 

HPF 


W/NO(EVOL2) 

DI 

PLLE(CPU3) 

FROO(EVOL23) 

UL(CPU21) 

CK(CPU54) 

PLLE(CPU3) 

8CL 

8CL 

LIPPLE 

FILTER 

DIGITAL 

POTENTIOMETER 

RX VCO 

MODI(EVOL9) 

TX VCO 

KDC 

Q402,403 

D405,406 

BEAT 

SHIFT 

BUFFER AMP 

8C 

D403,404 

CV 

MIC AMP/ 

SPLATTER 

FILTER 

MOD 

MODULATION 

8C 

1/2Vcc 

AGC/ 

MIC MUTE 

T/R SW 

PLL IC 

D407 

T/R SW 

16.8MHz 

BEAT 

SHIFT 

MOD 

LIPPLE 

FILTER 

RF AMP 

MOD 

SUM AMP 

PLL SYNTHESIZER 

SQC 

PKS 

PR1 

PR9 

PKD 

SINGLE 

ANALOG SW 

SINGLE 

ANALOG SW 

MOD BUFFA 

1/2Vcc 

DC 

AMP 

Q201 

SURGE ABSORPTION 

D5,6 

RIPPLE 

FILTER 

1 

2 

3 

4 

5 

6 

7 

8 

9 

10 

CLK 

NC3 

DATA 

LE 

FC 

NC4 

FOUT 

P 

NC5 

R 

OSCIN 

NC1 

OSCOUT 

VP 

VCC 

DO 

GND 

LD 

NC2 

FIN 

2SC4649(N,P) 

Q404 

2SK508NV(K52) 

Q406 

2SJ347 

Q407 

2SK508NV(K52) 

Q405 

2SC5108(Y) 

Q410 

Q408 

KRX102U 

2SC2412K 

Q440 

CONT 

VDD 

2SK1830 

Q87 

X86 

8.00MHz 

L78-1409-05 

2SK1830 

Q86 

8 

9 

10 

11 

12 

13 

14 

1 

2 

3 

4 

5 

6 

7 

2VOLI 

2VOLO 

BLO 

BLI 

1VOLI 

1VOLO 

DO 

VDFref 

RESET 

GND 

FRQI 

FRQO 

PC/TVO 

PC/TVI 

VDD 

LD 

CLK 

DAT 

MODI 

MODO 

W/NO 

W/NI 

BRII 

BRIO 

QT/DQT(CPU1) 

1/2Vcc 

EVLLD(CPU8) 

UL(CPU21) 

PLLE(CPU3) 

M1MT(CPU76) 

XOUT(CPU11) 

XIN(CPU13) 

TX DTMF 

BSHIFT 

P9MT(CPU75) 

MICMT(CPU77) 

TX/RX (CPU20) 

W/NO(EVOL2) 

W/NI(EVOL1) 

MIC 

VOLO(EVOL11) 

VOLI(EVOL12) 

DT(CPU53) 

CK(CPU54) 

BRI 

PLLE(CPU3) 

MODO(EVOL10) 

PC/TV 

UL(CPU21) 

PC/TVO(EVOL3) 

EVLLD(CPU8) 

P9MT(CPU75) 

MICMT(CPU77) 

MOD 

TX/RX (CPU20) 

T:4.16V 

T:0.82V 

R:1.8mV(BS OFF) 

5V(BS ON) 

R:4.92V 

T:3.9mV 

R:7.04V 

R:4.90V 

R:0.74V 

T:0.62V 

R:3.37V 

R:6.11V 

R:6.17V 

R:7.9V 

R:0.71V 

R:2.48V 

R:7.7V 

4.97V 

R:4.98V 

R:6.96V 

T:6.8V 

R:0.97V 

R:4.96V 

R:2.8mV 

R:0.1mV 

R:0.76V 

R:4.05V 

R:7.98V 

R:7.01V 

X57-685 1/3

SCHEMATIC DIAGRAM TM-271A/271E 

35 

J 

I 

H 

G 

F 

X57-685 2/3 

35 

C461 

1000p 

C377 

1000p 

R118 0 

C511 

1000p 

R322 

100 

R301 

4.7k 

2SC3357 

Q502 

R371 

39k 

L504 

27n 

C514 

1000p 

R103 

1k 

L421 

100n 

C301 

4.7u6.3 

C376 

1000p 

C502 

1000p 

R353 

100k 

R324 

0 

C458 

220p 

C268 

1u 

C361 

1000p 

R101 

47k 

R376 

100k 

C319 

1000p 

R509 

22 

C312 0.1u 

R514 

0 

L304 

330n 

C467 

1000p 

C515 

27p 

D409 

DAN235E 

8T 

C465 

22p 

C372 

1000p 

C363 

0.01u 

R268 

1k 

R359 

220k 

R319 

10k 

C456 

2p 

C507 

1000p 

C459 

1000p 

C324 

0.01u 

C366 

0.1u 

C387 

1000p 

R360 

470k 

R351 

470 

8R 

69 

R106 

1k 

C314 

0.01u 

34 

L302 

330n 

CNVSS 

D303 

DAN222 

R366 

470 

R438 

22k 

C311 0.1u 

C364 

1000p 

R370 

56 

C504 

1000p 

R510 

1.5k 

L501 

68n 

C384 

2p 

5M 

C463 

1000p 

C151 

1800p 

5M 

R315 

18k 

C519 82p 

C383 

1000p 

R369 

0 

R444 

1k 

C101 

1000p 

R109 

1.5k 

IC66 

AT24C64A10SI18 

or CAT24WC64JI 

1 A0 

2 A1 

3 A2 

4 GND 5 

6 

7 

8 

R442 

100 

IC402 

UPB1509GV 

1 

2 

3 

4 5 

6 

7 

8 

R516 

0 

C104 

0.1u 

R356 

1k 

5M 

R317 

10k 

5M 

R105 

1k 

L303 

330n 

8R 

R504 

270 

C371 

2p 

R111 

1k 

R102 

47k 

R511 

47 

C505 

1000p 

R437 

1k 

R325 

33k 

C513 

1000p 

R503 

18 

C358 

1000p 

L101 

C322 

56p 

C460 

18p 

C512 

1000p 

5C 

L301 

L34-4554-05 

8C 

8C 

R81 

47k 

5C 

R123 

0 

C378 

1000p 

D502 

DA221 

C302 

1000p 

R70 

47k 

71 

R104 

1k 

L420 

150n 

R321 

22k 

C351 

33p 

R502 

270 

R82 

0 

R314 2.2k 

C516 

820p 

L352 

560n 

C326 

0.01u 

C509 

15p 

D501 

1SS355 

C379 

1000p 

R151 

10k 

C518 33p 

R513 

2.2k 

C466 

100p 

C313 

15u6.3 

C66 

1000p 

L503 

27n 

70 

C323 

270p 

R512 

10 

8R 

C510 

8p 

R364 

0 

R250 

12k 

R505 

2.2k 

8R 

C267 

0.47u 

C464 

1000p 

5M 

5M 

C360 

1000p 

C357 

0.01u 

R152 

4.7k 

D302 

DAN222 

C462 

10p 

R373 

47k 

L422 

56n 

C316 

0.1u 

C250 

0.1u 

C375 

1000p 

C83 

0.1u 

C468 

220p 

C315 

0.1u 

L502 

68n 

C380 

100p 

L419 

100n 

R110 

47k 

R443 

2.2k 

R441 

100 

8R 

C457 

1000p 

C501 

1000p 

R352 

100 

R362 

470k 

C506 

1000p 

R316 

22k 

C82 

1000p 

C362 

1000p 

R354 

330 

R249 

15k 

C503 

100p 

C517 3p 

C370 

1000p 

R318 

10k 

R501 

1k 

C359 

8p 

R439 

47k 

R365 

100k 

C152 

3900p 

R368 

100k 

R506 

10k 

L351 

820n 

R323 

120k 

R507 

10 

2SC4649(N,P) 

Q411 

2SC3357 

Q501 

C102 

0.1u 

R302 

4.7k 

R320 

10k 

R269 

39k 

C317 

0.1u 

R375 

100k 

C353 

0.01u 

R440 

100 

17 

5M 

C318 

0.1u 

TONE 


PLLE 

NC 

NC 

GND 

CNVSS 

EVLLD 

BSHIFT 

RESET 

XOUT 

VSS 

XIN 

VCC 

GND 

NC 

POWER 

INT 

NC 

TX/RX 

UL 

NC 

NC 

EEPSDT 

EEPCK 

26 

27 

28 

29 

30 

31 

32 

33 

34 

35 

36 

37 

38 

39 

40 

41 

42 

43 

44 

45 

46 

47 

48 

49 

50 

51 

52 

53 

54 

55 

56 

57 

58 

59 

60 

61 

62 

63 

64 

65 

66 

67 

68 

69 

70 

71 

72 

73 

74 

75 

76 

P1MT 

77 

MICMT 

78 NC 

79 8RC 

80 8TC 

81 NC 

82 SBC 

83 NC 

84 NC 

85 NC 

86 CM 

87 MICKEY2 

88 MICKEY 

89 VOL 

90 TEMP2 

91 TEMP1 

92 RSSI 

93 SQIN 

94 AVSS 

95 DTMF IN 

96 VREF 

97 AVCC 

98 NC 

NC 

NC 

74 

73 

R124 

47k 

R92 

1k 

R91 

1k 

87 

R127 

47k 

88 

89 

2SC2412K 

Q302 

C321 

68p 

C474 

1000p 

SQC 

PKS 

PR1 

5M 

68 

R125 

47k 

R119 

* 

R120 

* 

R122 0 

R121 

* 

R246 

150k 

R247 

120k 

R248 

5.6K 

C249 

4.7u6.3 

2SC5488 

Q351 

R355 

470 

C355 

18p 

C354 

4.5p 

C356 

3p 

R358 

220 

R361 

180 

C367 

150p 

R363 

330k 

C369 

3p 

L354 

50n 

L355 

50n 

D351 

HVC376B 

C368 

27p 

R367 

100 

C373 

6p 

C374 

27p 

D352 

HVC376B 

3SK318 

Q352 

G1 

D 

S 

G2 

3SK318 

Q353 

G1 

D 

S 

G2 

R372 

47k 

R374 

27k 

L356 

50n 

C382 

27p 

C386 

36p 

L357 

35.5n 

D353 

HVC376B 

D354 

HVC376B 

C471 

10p 

C128 

1000p 

R126 

47k 

L423 

R114 

47k 

5M 

C385 

8p 

C381 

4.5p 

2SK3019 

Q252 

2SK3019 

Q253 

8TC(CPU80) 

FM DEMODULATION 

TP 

TEMPERATURE 

COMPENSATION 

TEMPERATURE 

COMPENSATION 

5M 

WIDE(CPU65) 

TXD 

RXD 

RF SWITCH 

NARROW 

NARROW(CPU64) 

D351,352 

IF SWITCH 

RF BPF TUNING 

D353,354 

IF AMP 

50,4MHz 

D501 

8R 

8R 

IF SWITCH 

W/NI(EVOL1) 

EEPROM 

RF AMP 

CPU 

AFV 

AF MUTE 

AF MUTE 

AFI(EVOL12) 

DIVIDER 

(HETERO) 

AFM(CPU50) 

WIDE 

RF AMP/ 

DRIVE STAGE 

BUFFER AMP 

RF BPF TUNING 

MIXER 

RF AMP 

8RC(CPU76) 

8TC(CPU80) 

AMPSW(CPU52) 

SPM(CPU51) 

BRI 

8RC(CPU76) 

VOLO(EVOL11) 

W/NO(EVOL2) 

MIC 

PC/TV 

RF AMP/ 

DRIVE STAGE 

CM 

MICKEY 

VOL 

TV 

TX/RX (CPU20) 

QT/DQT(CPU1) 

EVLLD(CPU8) 


UL(CPU21) 

PLLE(CPU3) 

XOUT(CPU11) 

XIN(CPU13) 

POWER 

M1MT(CPU76) 

P9MT(CPU75) 

MICMT(CPU77) 

CK(CPU54) 

DT(CPU53) 

W/NO(EVOL2) 

PC/TV 

W/NI(EVOL1) 

MIC 

VOLI(EVOL12) 

VOLO(EVOL11) 

BRI 

SQIN(CPU93) 

RSSI(CPU92) 

SBC(CPU82) 

1/2Vcc 

DTMF IN(CPU95) 

BSHIFT 

IC101 

30622MAA-B85GP 

NC 

SQC 

PKS 

CLKFLS 

BSYFLS 

TXD 

RXD 

PTT 

NC 

NC 

NC 

EMPFLS 

NC 

NC 

NC 

NC 

CEFLS 

NC 

NC 

NC 

NC 

NC 

AFM 

EEPWP 

NC 

SPM 

AMPSW 

DT 

CK 

NC 

DST1 

DST2 

DST3 

DST4 

VCC 

NC 

VSS 

ADJ 

NARROW 

WIDE 

NC 

NC 

CL 

CE 

DO(to LCD) 

DI(from LCD) 

NC 

ENCB 

ENCA 

P9MT 

99 

100 

1 

2 

3 

4 

5 

6 

7 

8 

9 

10 

11 

12 

13 

14 

15 

16 

17 

18 

19 

20 

21 

22 

23 

24 

25 

SPM(CPU51) 

AMPSW(CPU52) 

W/NI(EVOL1) 

VOLI(EVOL12) 

SW1 

SW2 

OUT 

VCC2 

VCC1 

IN 

IN 

GND 

SDA 

SCL 

WP 

VCC 

SQIN(CPU93) 

SBC(CPU82) 

RESET(CPU10) 

INT(CPU18) 

1/2Vcc 


RSSI(CPU92) 

IC301 

TK14489V 

SCAN 

SCAN 

SQLIN 

FLAMPO 

RFIN 

GND 

Hy_C 

FLAMPI 

RSSI 

AFO 

VCC 

IF_IN 

DEC1 

DEC2 

PH_S 

QUCO 

OSC(B) 

OSC(E) 

NC 

MIX_O 

1 

2 

3 

4 

5 

6 

7 

8 

9 

10 11 

12 

13 

14 

15 

16 

17 

18 

19 

20 

XF351 

49.95MHz 

L71-0620-05 

CF301 

L72-0993-05 

CF302 

L72-0999-05 

R:3.22V 

R:4.65V 

R:4.27V 

R:0.66V 

T:0.48V 

N:5V 

W:0V 

T:1.23V 

R:2.46V 

R:4.98V 

R:7.99V 

R:7.42V 

R:4.84V 

T:5.73V 

4.98V 

R:0.75V 

R:0.56V 

R:4.7mV(SQ OFF) 

4.97V(SQ ON) 

R:1.44V 

R:6.34V 

R:6.64V 

N:0V 

W:5V 

T:1.26V 

T:6.8V 

T:0.88V 

T:7.82V 

R:1.23V 

R:5V 

R:2.7V 

R:7.84V 

T:5.61V 

R:2.88V 

R:5.86V 

R:3.16V 

TX-RX UNIT (X57-685X-XX)

TM-271A/271E SCHEMATIC DIAGRAM 

36 

K L M N O 

X57-685 3/3 

-t 

C33 

1000p 

C559 

0.1u 

R305 

1.8k 

L603 

5T 

C43 

22u10 L601 

6T 

C527 

1000p 

R304 

4.7k 

B 

5M 

R259 

12k 

C617 

1000p 

IC33 

NJM78L05UA 

2 

COM 

3 

IN 

1 OUT 

2 

COM 

3 

IN 

1 

OUT 

R252 

470k 

2SA1641(S,T) 

Q31 

R261 

120k 

C263 

0.033u 

C55 

0.1u 

R36 

1.5k 

5C 

R258 

2.7k 

C29 

470p 

R527 

220k 

R350 

27k 

BSB 

C603 

1000p 

C257 

0.039u 

R41 

330k 

C41 

22u10 

R606 

220 

C307 

0.022u 

C45 

22u10 

C530 

0.47u 

C281 1000p 

R526 

150 

R37 

0 

TH301 

100k 

8R 

5C 

C310 

0.33u 

R278 

12k 

C52 

1000p 

8T 

L604 

5T 

R34 

4.7k 

R521 

100 

C44 

22u10 

R271 

3.3k 

8T 

C34 

330u 25 

L509 

9.5T 

R39 

470k 

Q254 

DTC363EU 

R257 

1M 

R255 

5.6k 

C278 0.1u 

KTA1664(Y) 

Q35 

68 

C54 

0.1u 

L508 

2.5T 

D608 

1SS355 

D602 

MA4PH633 

R306 

270k 

C606 

0.5p 

R265 

5.6k 

R308 

330k 

C254 

0.22u 

SB 

73 

R275 

15k 

R33 

47k 

R276 

47k 

C36 

1000p 

C306 

1000p 

R273 

12k 

C258 

0.01u 

C536 

1000p 

C350 

470p 

C274 

0.22u 

C546 

0.47u 

R800 

F501 

R520 

18k 

R605 

15k 

C39 

0.1u 

D61 

02DZ18(X,Y) 

R531 

47k 

C272 

1000p 

R251 

47k 

70 

Q36 

KRC102S 

R519 

33k 

C28 

220p 

B 

C276 

1000p 

R281 

0 

C49 

0.01u 

34 

C550 

68p 

C526 

680p 

R266 

5.6k 

C266 

1u 

C277 

1000p 

2SA1745(6,7) 

Q33 

C557 

0.01u 

R61 

470 

C615 

22p 

8C 

R349 

47k 

C251 

4.7u6.3 

R530 

1k 

D301 

MA742 

Q32 

KRC102S 

C531 

47u25 

C38 

1000p 

D251 

MA742 

74 

C545 

1000p 

R533 

0 

D606 

MA742 

L605 

9.5T 

C522 

1000p 

C610 

0.5p 

C308 

1000p 

C608 

27p 

71 

R277 

68k 

C271 

1200p 

CN5 

C616 

1000p 

C42 

0.01u 

69 

35 

C529 

1000p 

C275 

1u 

C61 

1000p 

D32 

1812L110PR 

L602 

5T 

R254 

2.7k 

89 

C574 

1000p 

C554 

1000p 

R312 

47k 

C53 

1000p 

C560 

1000p 

C613 

27p 

C576 

220p 

C265 

0.1u 

R256 

5.6k 

C51 

10u6.3 

D503 

02DZ5.1(Y) 

C280 47u16 

R602 

22k 

R313 

100k 

17 

5C 

C389 

1000p 

L506 

9.5T 

C279 4.7u16 

R601 

22k 

R279 

4.7k 

87 

R310 

1k 

R263 

91k 

BSB 

L507 

1T 

R379 

100k 

C253 

0.22u 

C262 

1000p 

R532 

0 

D607 

MA742 

R518 

33 

R35 

47k 

Q34 

KRC102S 

C40 

0.1u 

R274 

15k 

R62 

0 

C273 

1u 

C611 

2p 

C56 

1000p 

R525 

56k 

R529 

470 

R253 

0 

8T 

C558 

0.01u 

R31 

4.7k 

C549 

220p 

R40 

390k 

Q255 

KRC102S 

R528 

470 

C35 

1000p 

C525 

1000p 

D31 

ZSH5MA27 

R272 

3.9k 

R524 

470 

Q61 

KRC404RTK 

R264 

120k 

R38 

330k 

8T 

2 

COM 

1 

IN 

3 

OUT 

C556 

1000p 

C252 

39p 

8R 

C50 

0.01u 

C255 

8200p 

8C 

C309 

0.022u 

C283 

1000p 

C37 

1000p 

R303 

22k 

IC501 

TA75W01FU 

1 

2 

3 

4 

VEE 

5 

6 

7 

8 

VCC 

D605 

XB15A709 

C261 

0.01u 

R309 

3.3k 

R262 

18k 

C256 

0.018u 

R311 

33k 

C607 

2p 

C303 

4700p 

R260 

220k 

C30 

1000p 

C528 

220p 

R32 

470 

C264 

0.033u 

R280 

390 

C555 

5p 

R4 

1k 

R2 100 

R3 100 

CN1 

R7 

1k 

R5 

1k 

R8 

1k 

R6 

1k 

C13 470p 

C14 470p 

C10 1000p 

C15 470p 

R1 0 

D3 

DA221 

D2 

DA221 

D4 

DA221 

D1 

DA221 

8C 

5C 

5M 

88 

R522 

330 

R523 

39k 

C533 

100p 

L505 

15n 

C542 

12p 

C541 

12p 

C552 

22p 

C553 

3p 

C614 

* 

C623 

3p 

C602 

12p 

C605 

15p 

D603 

XB15A709 

VR601 

47k 

R607 

330 

PR9 

C305 

330p 

C304 

330p 

1 

2 

3 

4 VCC 

5 

6 

7 

VEE 

2SC2412K 

Q251 

FB 

R63 

0 

D62 

MA2S077 

1 

NC 

2 

SUB 

3 

GND 

4 

VOUT 

5 

VCC 

IC34 

BD4732G 

1 

NC 

2 

SUB 

3 

GND 

4 

VOUT 

5 

VCC 

J1 

F1 

FB 

C282 

330u25 

C388 

7p 

C390 

9p 

C391 

16p 

2SK1830 

Q354 

PD55003TR 

Q503 

C544 

15p 

C543 

15p 

KEC 

8TC 

CURRENT 

PROTECTION 

BUFFER 

AMP 

MIC 

AUDIO 

FILTER 

SQIN(CPU93) 

B 

OVER VOLTAGE 

DETECTION 

E 

VOLTAGE 

REGULATOR 

(8C) 

REVERSE 

CONNECTION 

PROTECTION 

APC CONTROLLER 

FINAL AMP 

D603,605 

TEMPERATURE 

COMPENSATION 

1/2Vcc 

D31 

TV 

5M 

LIMITTER 

PC/TV SW 

KEC 

PC 

8T 

KEC 

Q35,36 

APC VOLTAGE 

DETECT 

VOLTAGE 

DETECTOR 

(RESET) 

D606,607 

ANT SW 

ANT SW 

D1-4 

VOLTAGE 

REGULATOR 

(5M) 

8TC(CPU80) 

8RC(CPU76) 

D32 

DRIVE AMP 

RX 

1,1A 

5C 

DETECTION 

VOLTAGE 

DETECTOR 

(INT) 

DC SW (SB) 

8C 

W/NO(EVOL2) 

NOISE AMP/ 

SQL AMP 

VOLTAGE 

PROTECTION 

KEC 

Q33,34 

KEC 

8C 

SB 

OVER VOLTAGE 

DETECTION 

VOLTAGE 

REGULATOR 

(5C) 


KEC 

AF MUTE 

AF MUTE 

8R 

POWER 

IC252 

LA4600 

1 

2 

3 

4 

5 

6 

7 

8 

9 

10 

PTT 

BRI 

RXD 

POWER 

VOL 

8C 

5C 

DO 

CL 

CE 

DI 

MICKEY 

ENCB 

CM 

ENCA 

MIC 

DC SW (SB) 

DC SW (8R) 

DC SW (8T) 

OVER VOLTAGE 

DETECTION 

BRI 

AUDIO AMP 

RD70HVF1-01 

Q504 

AMPSW(CPU52) 

MIC 

8TC(CPU80) 

SPM(CPU51) 

8RC(CPU76) 

BRI 

PC/TV 

VOLO(EVOL11) 

W/NO(EVOL2) 

2SC2412K 

Q301 

8 

9 

10 

11 

12 

13 

14 

IC251 

BA10324AFV 


INT(CPU18) 

RESET(CPU10) 

SBC(CPU82) 

1/2Vcc 

SQIN(CPU93) 

INT(CPU18) 

RESET(CPU10) 

SBC(CPU82) 

IC35 

BD4740G 

IC31 

KIA7808AF 

IC32 

NJM78L05UA 

AMPSW(CPU52) 

VOLO(EVOL11) 

SPM(CPU51) 

1 

2 

3 

4 

5 

6 

7 

8 

9 

10 

11 

12 

13 

14 

15 

16 

17 

18 

C259 

0.01u 

C260 

0.01u 

C270 

4.7u6.3 

T:1.6V 

R:4.02V 

R:13.8V 

T:13.45V 

T:1.45V 

R:4.98V 

R:2.7V 

R:7.9V 

R:13.8V 

R:4.98V 

T:7.55V 

R:13.66V 

T:12.94V 

R:4.31V 

R:1.15V 

R:3.37V 

R:4.98V 

R:1.74V 

R:3.3V 

R:7.9V 

T:0.76V 

T:7.84V 

R:7.95V 

T:2.5V 

T:1.46V 

T:7.85V 

R:0.87V 

T:4.97V 

T:7.84V 

TX-RX UNIT (X57-685X-XX)

1 

2 

3 

4 

5 

6 

7 

8 

9 

0 

0 

0 

P 

Q 

R 


SCHEMATIC DIAGRAM TM-271A/271E 

S 

LCD (B38-0885-05) 

T 

1 

MR 

VFO 

CALL 

C39 

0.1u 

D31 

R55 

MHz & MENU 

ADJUASTMENT 

S1 

W02-3665-05 

ENCODER 

REV 

Func 

COM3 

COM2 

COM1 

COM0 

SEG31 

SEG30 

SEG29 

SEG28 

SEG27 

SEG26 

SEG25 

SEG24 

SEG23 

SEG22 

SEG21 

SEG20 

SEG19 

SEG18 

SEG17 

SEG16 

SEG15 

SEG14 

SEG13 

SEG12 

SEG11 

SEG10 

SEG9 

SEG8 

SEG7 

SEG6 

SEG5 

SEG4 

SEG3 

SEG2 

SEG1 

SEG0 

1SS355 

0 

J1 

CN1 

8 

1 

18 

17 

16 

15 

14 

13 

12 

11 

10 

9 

8 

7 

C24 

0.1u 

MBL(Key A) 

8C 

GND 

PTT 

ME 

MIC 

HOOK 

CM 

MIC 

ME 

GND 

PTT 

BRI 

RXD 

POWER 

VOL 

8C 

5C 

DO 

CL 

C40 

0.1u 

C34 

4700p 

C35 

4700p 

R47 

47k 

R48 

47k 

C4 

4.96V 

100p 

C31 

1000p 

C32 

C27 

1000p 

VR1 

R31-0646-05 

VARIABLE 

RESISTOR 

1000p 

C33 

1000p 

L1 

R53 

ON/OFF & VOLUME 


4.94V 

C30 

0.1u 

R46 

100 

R52 

C38 

470p 

C36 

1u 

CP1 

R90-0724-05 

4.96V 

R51 

49 

50 

51 

52 

53 

54 

55 

56 

57 

58 

59 

60 

61 

62 

63 

64 

48 

NC 

KI1 

KI2 

KI3 

NC 

NC 

NC 

VDD 

VDD1 

VDD2 

VSS 

OSC 

47 

46 

45 

44 

43 

42 

41 

40 

BL 

NC 

NC 

NC 

NC 

NC 

NC 

KS2 

SEG0 

KS1 

SEG1 

COM3 

SEG2 

COM2 

SEG3 

COM1 

SEG4 

COM0 

10 

SEG5 

NC 

11 

SEG6 

NC 

12 

SEG7 

NC 

13 

SEG8 

SEG31 

14 

SEG9 

SEG30 

15 

SEG10 

SEG29 

16 SEG11 

SEG28 

DO (to cpu) 

CE 

CL 

DI (from cpu) 

39 

38 

LCD CONTROLLER 

IC3 

PT6554LQ 

or 

LC75854W 

37 

36 

35 

34 

33 

SEG27 

SEG26 

SEG25 

SEG24 

SEG23 

SEG22 

SEG20 

SEG20 

SEG19 

SEG18 

SEG17 

SEG16 

SEG15 

SEG14 

SEG13 

SEG12 

32 

31 

30 

29 

28 

27 

26 

25 

24 

23 

22 

21 

20 

19 

18 

17 

2 

3 

6 

5 

CE 

DI(from LCD) 

R21 

10k 

R22 

10k 

R23 

10k 

R25 

56k 

4 

3 

MIC KEY 

ENCODER B 

C15 

100p 

C16 

100p 

C19 

680p 

2 

CM 

LCD BACKLIT SWITCH 

LCD ILLUMINATION 

1 

ENCODER A 

7.90V 

7.90V Q9 

7.10V 

2SB1132(Q,R) 

R49 

D19 

D20 

D21 

C25 

1000p 

KEY ILLUMINATION 

D2 D3 D4 

B30-2205-05 

D2-4 

KEY BACKLIT 

KEY BACKLIT SWITCH 

Q10 

KRA225S 

R10 

1.2k 

Q6 

KRC102S 

DC SWITCH 

4.80V(BRIGHTNESS MAX) 

0V(BRIGHTNESS OFF) 

Q12 

UMG3N 

R8 

1k 

C22 

1000p 

R26 

R42 

R43 3.9k 

2.7k 

820 

R45 R44 

DIMMER 

FUNCTION 

SWITCH 

7.30V 

18k 

33k 

56 

R41 

56 

R50 

56 

R54 

56 

5.02V 

B30-2205-05 

D22 

B30-2205-05 

D25 

B30-2205-05 

D28 

B30-2205-05 

B30-2205-05 

D23 

B30-2205-05 

D26 

B30-2205-05 

D29 

B30-2205-05 

D19-30 

LCD BACKLIT 

B30-2205-05 

D24 

B30-2205-05 

D27 

B30-2205-05 

D30 

B30-2205-05 

4 

X57-685X-XX 

C203 

C206 

C207 

C614 

R119 

R120 

R121 

R204 

R207 

0-10 

K 

0.027u 

1000p 

0.022u 

NO 

0 

0 

0 

18k 

750k 

TM-271A 

144-148MHz 

0-21 

0-22 

M2 

M3 

0.027u 

0.027u 

1000p 0.022u 

1000p 0.022u 

NO 

NO 

NO 

0 

NO 

NO 

NO 

NO 

18k 

18k 

750k 

750k 

TM-271E 

144-146MHz 

0-23 

2-71 

M4 

E 

0.027u 

0.047u 

1000p 

680p 

0.022u 

0.039u 

NO 

3p 

0 0 

0 NO 

NO 

0 

18k 

10k 

750k 

1M 

5 

Note : The components marked with a dot (•) are parts of layer 1. 

6 

7 

37 

X54-345 1/1

-t 

-t 

-t 

C422 

470p 

C33 

1000p 

C559 

0.1u 

35 

C408 

22p 

R427 

100k 

R305 

1.8k 

C461 

1000p 

C377 

1000p 

L603 

5T 

C218 

10u6.3 

C43 

22u10 

R118 0 

C444 

470p 

L601 

6T 

C527 

1000p 

R422 

10k 

C438 

0.5p 

R304 

4.7k 

C511 

1000p 

C437 

470p 

C212 

1200p 

R161 

1.2k 

C453 

220p 

R322 

100 

B 

5M 

C164 

10u6.3 

R259 

12k 

R301 

4.7k 

C617 

1000p 

IC33 

NJM78L05UA 

2 

COM 

3 

IN 

1 OUT 

2 

COM 

3 

IN 

1 

OUT 

2SC3357 

Q502 

R371 

39k 

C88 

4p 

R252 

470k 

L504 

27n 

2SA1641(S,T) 

Q31 

R261 

120k 

C263 

0.033u 

C55 

0.1u 

R36 

1.5k 

C232 

1000p 

5C 

C514 

1000p 

R200 

680 

R103 

1k 

R258 

2.7k 

L421 

100n 

R227 

22k 

C29 

470p 

C301 

4.7u6.3 

C376 

1000p 

R527 

220k 

C502 

1000p 

R350 

27k 

C220 

4.7u6.3 

R353 

100k 

BSB 

C163 

1000p 

C603 

1000p 

C441 

0.5p 

R324 

0 

C458 

220p 

C257 

0.039u 

R41 

330k 

TC401 

10p 

R416 

470 

C41 

22u10 

C268 

1u 

R229 

680k 

C361 

1000p 

C215 

0.1u 

R606 

220 

C432 

0.3p 

R101 

47k 

R376 

100k 

C307 

0.022u 

R166 

1k 

C45 

22u10 

C530 

0.47u 

8C 

C319 

1000p 

C281 1000p 

R509 

22 

C213 

3300p 

C312 0.1u 

R526 

150 

R37 

0 

TH301 

100k 

R514 

0 

L304 

330n 

8R 

5C 

5C 

C231 

1000p 

C233 

4.7u6.3 

C310 

0.33u 

C467 

1000p 

L404 

R162 

1.5k 

R278 

12k 

C52 

1000p 

C515 

27p 

8T 

D409 

DAN235E 

L604 

5T 

8T 

R419 

2.7k 

R218 

82k 

C465 

22p 

R34 

4.7k 

R521 

100 

C87 

3p 

C44 

22u10 

C372 

1000p 

C363 

0.01u 

R268 

1k 

R359 

220k 

R319 

10k 

C456 

2p 

C507 

1000p 

R208 

1.5k 

C459 

1000p 

R271 

3.3k 

8T 

C34 

330u 25 

C324 

0.01u 

C450 

22u10 

L509 

9.5T 

R211 

82k 

R39 

470k 

Q254 

DTC363EU 

C366 

0.1u 

R257 

1M 

C387 

1000p 

R426 

47k 

R233 

6.8k 

R360 

470k 

R255 

5.6k 

C278 0.1u 

KTA1664(Y) 

Q35 

C227 

0.01u 

R230 

220k 

R421 

1.5k 

R351 

470 

68 

5C 

R207 

* 

D404 

MA2S304 

C54 

0.1u 

D403 

MA2S304 

L508 

2.5T 

C428 

470p 

8R 

69 

5M 

D608 

1SS355 

C421 

470p 

R106 

1k 

C314 

0.01u 

34 

D602 

MA4PH633 

R306 

270k 

L302 

330n 

CNVSS 

C410 

10u6.3 

C606 

0.5p 

D303 

DAN222 

C448 

470p 

R366 

470 

R438 

22k 

R203 

100k 

R265 

5.6k 

R308 

330k 

C311 0.1u 

C254 

0.22u 

C364 

1000p 

SB 

73 

R275 

15k 

R33 

47k 

R276 

47k 

R370 

56 

C36 

1000p 

R412 

10k 

D405 

MA2S304 

2SC4919 

Q201 

C306 

1000p 

R273 

12k 

C205 

0.1u 

C258 

0.01u 

C504 

1000p 

2SC4738(GR) 

Q403 

C536 

1000p 

R510 

1.5k 

2SA1832(GR) 

Q402 

L501 

68n 

C384 

2p 

5M 

C350 

470p 

C274 

0.22u 

C463 

1000p 

C151 

1800p 

D406 

MA2S304 

5M 

R212 

82k 

L416 

R315 

18k 

C546 

0.47u 

R800 

F501 

C403 

100p 

R520 

18k 

R605 

15k 

C519 82p 

C383 

1000p 

R369 

0 

R444 

1k 

C101 

1000p 

R109 

1.5k 

C39 

0.1u 

IC66 

AT24C64A10SI18 

or CAT24WC64JI 

1 A0 

2 A1 

3 A2 

4 GND 5 

6 

7 

8 

D61 

02DZ18(X,Y) 

L201 

R531 

47k 

R442 

100 

C272 

1000p 

R251 

47k 

R205 

820 

R409 

100k 

70 

IC402 

UPB1509GV 

1 

2 

3 

4 5 

6 

7 

8 

D401 

MA2S111 

R516 

0 

Q36 

KRC102S 

R519 

33k 

C28 

220p 

C409 

0.1u 

B 

C104 

0.1u 

C276 

1000p 

R281 

0 

R356 

1k 

5M 

R317 

10k 

C49 

0.01u 

34 

C550 

68p 

C526 

680p 

5M 

R105 

1k 

C436 

0.75p 

L303 

330n 

R165 

1k 

R266 

5.6k 

C266 

1u 

R425 

47k 

8R 

R435 

100 

C277 

1000p 

2SA1745(6,7) 

Q33 

C557 

0.01u 

R61 

470 

R415 

0 

C161 

1000p 

C615 

22p 

L405 

8C 

R349 

47k 

R504 

270 

C371 

2p 

C414 

0.1u 

R111 

1k 

C251 

4.7u6.3 

R530 

1k 

R102 

47k 

D301 

MA742 

Q32 

KRC102S 

R511 

47 

C531 

47u25 

C38 

1000p 

D251 

MA742 

74 

C505 

1000p 

R437 

1k 

C545 

1000p 

R325 

33k 

R533 

0 

D201 

DAN222 

5C 

C452 

470p 

D606 

MA742 

5M 

L605 

9.5T 

C513 

1000p 

R503 

18 

C358 

1000p 

L101 

C522 

1000p 

R86 

0 

C610 

0.5p 

C230 

0.1u 

C308 

1000p 

R436 

120k 

C322 

56p 

C608 

27p 

71 

R277 

68k 

R164 

1k 

C460 

18p 

C271 

1200p 

CN5 

C512 

1000p 

C402 

100p 

5C 

C616 

1000p 

C208 

0.01u 

L301 

L34-4554-05 

C207 

* 

IC201 

NJM2100V 

1 

2 

3 

4 5 

6 

7 

8 

V+ 

C42 

0.01u 

69 

R430 

220 

35 

C529 

1000p 

C275 

1u 

TC402 

10p 

C455 

3p 

C61 

1000p 

D32 

1812L110PR 

8C 

L602 

5T 

8C 

R87 

1k 

R254 

2.7k 

89 

R434 

0 

C574 

1000p 

C554 

1000p 

R312 

47k 

C53 

1000p 

C560 

1000p 

C613 

27p 

C576 

220p 

C265 

0.1u 

R410 

8.2k 

R256 

5.6k 

R81 

47k 

5C 

C51 

10u6.3 

R123 

0 

D503 

02DZ5.1(Y) 

C416 

1000p 

C378 

1000p 

C280 47u16 

R602 

22k 

R313 

100k 

D502 

DA221 

17 

5C 

R217 

220k 

C389 

1000p 

C302 

1000p 

R70 

47k 

L506 

9.5T 

71 

R104 

1k 

L420 

150n 

C413 

0.01u 

C279 4.7u16 

R601 

22k 

R321 

22k 

D202 

1SS372 

C351 

33p 

C228 

10u6.3 

R413 

10k 

R502 

270 

R82 

0 

C411 

0.1u 

R314 2.2k 

C516 

820p 

R279 

4.7k 

C204 

2.2u10 

87 

L352 

560n 

R220 

15k 

R310 

1k 

C326 

0.01u 

C203 

* 

C418 

1000p 

C425 

0.1u35 

R263 

91k 

C509 

15p 

BSB 

D501 

1SS355 

L507 

1T 

C379 

1000p 

R221 

15k 

R151 

10k 

R379 

100k 

8C 

R407 

1.5k 

C89 

4p 

C253 

0.22u 

C262 

1000p 

R232 

9.1k 

R532 

0 

C518 33p 

C423 

0.047u35 

D607 

MA742 

R518 

33 

R513 

2.2k 

C217 

10u6.3 

R35 

47k 

C466 

100p 

C430 4.5p 

C313 

15u6.3 

C66 

1000p 

Q34 

KRC102S 

C40 

0.1u 

L503 

27n 

70 

C323 

270p 

R274 

15k 

R62 

0 

C273 

1u 

C611 

2p 

R512 

10 

C56 

1000p 

8R 

R417 

220k 

L417 

C510 

8p 

R525 

56k 

R364 

0 

R401 

1k 

R250 

12k 

R505 

2.2k 

R529 

470 

8R 

C406 

1000p 

R253 

0 

C267 

0.47u 

C464 

1000p 

R231 

120k 

5M 

5M 

C360 

1000p 

C357 

0.01u 

8T 

R152 

4.7k 

C558 

0.01u 

D302 

DAN222 

R433 

4.7k 

R31 

4.7k 

C549 

220p 

C462 

10p 

R373 

47k 

R40 

390k 

L422 

56n 

8C 

Q255 

KRC102S 

C214 

150p 

R528 

470 

C35 

1000p 

R411 

5.6k 

C525 

1000p 

C316 

0.1u 

R402 

1k 

D31 

ZSH5MA27 

R213 

330k 

R214 

68k 

C250 

0.1u 

R272 

3.9k 

R414 

470 

C375 

1000p 

R403 

1k 

C83 

0.1u 

C451 

470p 

C468 

220p 

C315 

0.1u 

C424 

1u16 

L502 

68n 

IC401 

MB15A02 

11 

12 

13 

14 

15 

16 

17 

18 

19 

20 

C380 

100p 

L419 

100n 

R219 

180k 

R110 

47k 

C210 

0.1u 

C454 

6p 

R443 

2.2k 

C417 

1000p 

R441 

100 

R524 

470 

Q61 

KRC404RTK 

8R 

R228 

10k 

C457 

1000p 

L403 

10u 

R264 

120k 

R38 

330k 

C501 

1000p 

R352 

100 

R362 

470k 

8T 

C506 

1000p 

2 

COM 

1 

IN 

3 

OUT 

R316 

22k 

C556 

1000p 

R226 

100k 

C82 

1000p 

C362 

1000p 

R354 

330 

R249 

15k 

C503 

100p 

D408 

MA2S111 

D402 

HZU5ALL 

C401 

100p 

C206 

* 

R215 

68k 

C252 

39p 

8R 

C517 3p 

C50 

0.01u 

C255 

8200p 

C370 

1000p 

8C 

R318 

10k 

R501 

1k 

C201 

0.1u 

C309 

0.022u 

C283 

1000p 

C359 

8p 

C37 

1000p 

R303 

22k 

C90 

3p 

R439 

47k 

C226 

4700p 

R365 

100k 

IC501 

TA75W01FU 

1 

2 

3 

4 

VEE 

5 

6 

7 

8 

VCC 

D605 

XB15A709 

C152 

3900p 

C261 

0.01u 

C431 

5p 

R368 

100k 

R506 

10k 

L351 

820n 

C202 

1000p 

R323 

120k 

C211 

820p 

C404 

15u6.3 

R309 

3.3k 

R507 

10 

2SC4649(N,P) 

Q411 

C162 

4.7u6.3 

R216 

270k 

R432 

1k 

R408 

10 

R262 

18k 

R204 

* 

C256 

0.018u 

R311 

33k 

C449 

470p 

C607 

2p 

C303 

4700p 

R418 

1k 

2SC3357 

Q501 

8C 

R431 

100k 

C102 

0.1u 

R260 

220k 

R302 

4.7k 

R206 

100 

C30 

1000p 

R320 

10k 

C225 

1u16 

C528 

220p 

R404 

10k 

R269 

39k 

R32 

470 

R209 

240k 

C264 

0.033u 

R280 

390 

C317 

0.1u 

R420 

1k 

R375 

100k 

C353 

0.01u 

R440 

100 

17 

5M 

C555 

5p 

R225 

150k 

C412 

10u6.3 

R210 

18k 

C442 

10u6.3 

C318 

0.1u 

R428 

47k 

C25 

1000p 

C15 

100p 

R43 

820 

C33 

1000p 

C19 

680p 

C4 

100p 

D26 

B30-2205-05 

Q12 

UMG3N 

D21 

B30-2205-05 

J1 

1 

8 

R41 

56 

CP1 

R90-0724-05 

C35 

4700p 

D24 

B30-2205-05 

R54 

56 

C39 

0.1u 

D2 

C22 

1000p 

Q6 

KRC102S 

C40 

0.1u 

L1 

R44 

18k 

CN1 

R21 

10k 

D30 

B30-2205-05 

R46 

100 

D31 

1SS355 

C27 

1000p 

R51 

0 

D3 

B30-2205-05 

R23 

10k 

R25 

56k 

D4 

C38 

470p 

D22 

B30-2205-05 

C36 

1u 

D23 

B30-2205-05 

R10 

1.2k 

R48 

47k 

R26 

3.9k 

D19 

B30-2205-05 

R49 

56 

C32 

1000p 

C24 

0.1u 

C31 

1000p 

R42 

2.7k 

Q10 

KRA225S 

R47 

47k 

D25 

B30-2205-05 

R45 

33k 

C16 

100p 

BL 

NC 

NC 

NC 

SEG0 

SEG1 

SEG2 

SEG3 

SEG4 

SEG5 

SEG6 

SEG7 

SEG8 

SEG9 

SEG10 

SEG11 

17 

18 

19 

20 

21 

22 

23 

24 

25 

26 

27 

28 

29 

30 

31 

32 

33 

34 

35 

36 

37 

38 

39 

40 

41 

42 

43 

44 

45 

46 

47 

48 

49 

NC 

50 

KI1 

51 

KI2 

52 

KI3 

53 

NC 

54 

NC 

55 

NC 

56 

VDD 

57 

VDD1 

58 

VDD2 

59 

VSS 

60 

OSC 

61 

DO (to cpu) 

62 

CE 

63 

CL 

64 

DI (from cpu) 

C34 

4700p 

D29 

B30-2205-05 

D20 

B30-2205-05 

R53 

0 

D27 

B30-2205-05 

R22 

10k 

VR1 

R31-0646-05 

R50 

56 

C30 

0.1u 

R52 

0 

D28 

B30-2205-05 

R8 

1k 

R4 

1k 

R2 100 

R3 100 

CN1 

R7 

1k 

R5 

1k 

R8 

1k 

R6 

1k 

C13 470p 

C14 470p 

C10 1000p 

C15 470p 

R1 0 

D3 

DA221 

D2 

DA221 

D4 

DA221 

D1 

DA221 

CN2 

1 

2 

3 

4 

5 

6 

7 

D5 

DA221 

C16 470p 

D6 

DA221 

C19 470p 

C17 470p 

C18 470p 

C20 470p 

IC205 

BU4S66 

1 I/O 

2 O/I 

3 VSS 4 

5 

R237 

0 

R236 

10k 

C235 

1u 

PR9 

PR1 

PKS 

SQC 

TONE 


PLLE 

NC 

NC 

GND 

CNVSS 

EVLLD 

BSHIFT 

RESET 

XOUT 

VSS 

XIN 

VCC 

GND 

NC 

POWER 

INT 

NC 

TX/RX 

UL 

NC 

NC 

EEPSDT 

EEPCK 

26 

27 

28 

29 

30 

31 

32 

33 

34 

35 

36 

37 

38 

39 

40 

41 

42 

43 

44 

45 

46 

47 

48 

49 

50 

51 

52 

53 

54 

55 

56 

57 

58 

59 

60 

61 

62 

63 

64 

65 

66 

67 

68 

69 

70 

71 

72 

73 

74 

75 

76 

P1MT 

77 

MICMT 

78 NC 

79 8RC 

80 8TC 

81 NC 

82 SBC 

83 NC 

84 NC 

85 NC 

86 CM 

87 MICKEY2 

88 MICKEY 

89 VOL 

90 TEMP2 

91 TEMP1 

92 RSSI 

93 SQIN 

94 AVSS 

95 DTMF IN 

96 VREF 

97 AVCC 

98 NC 

NC 

NC 

74 

73 

5C 

R234 

0 

IC204 

BU4S66 

1 

I/O 

2 

O/I 

3 

VSS 

4 

CONT 

5 

VDD 

C222 

0.1u 

R224 

560 

PKD 

PKD 

5C 

R124 

47k 

R93 

6.8k 

R92 

1k 

R94 

10k 

R91 

1k 

TH98 

100k 

C97 

1000p 

TH97 

100k 

C98 

1000p 

87 

R127 

47k 

88 

89 

C216 

39p 

IC161 

M62363FP 

1 

2 

3 

4 

5 

6 

7 

8 

9 

10 

11 

12 13 

14 

15 

16 

17 

18 

19 

20 

21 

22 

23 

24 

R222 

10k 

IC203 

BA10324AFV 

VCC 

VEE 

C209 

68p 

C165 

1u 

X401 

L77-1944-05 

R406 

10k 

2SC2412K 

Q302 

C321 

68p 

8C 

5C 

5M 

88 

C475 

1000p 

C476 

1000p 

C473 

1000p 

C400 

0.1u 

L406 

270n 

L407 

270n 

C426 

30p 

L409 

27u 

L408 

33n 

C427 

8p 

L410 

27u 

R423 

220 

C429 

1p 

R429 

270 

L411 

270n 

C434 

150p 

L413 

47n 

C435 

10p 

L412 

270n 

L414 

27u 

C439 

10p 

R424 

100 

L415 

27u 

C440 

11p 

L401 

L418 

33n 

C474 

1000p 

R522 

330 

R523 

39k 

C533 

100p 

L505 

15n 

C542 

12p 

C541 

12p 

C552 

22p 

C553 

3p 

C614 

* 

C623 

3p 

C602 

12p 

C605 

15p 

D603 

XB15A709 

VR601 

47k 

R607 

330 

SQC 

PKS 

PR1 

PR9 

5M 

68 

R125 

47k 

R119 

* 

R120 

* 

R122 0 

R121 

* 

R246 

150k 

C305 

330p 

C304 

330p 

1 

2 

3 

4 VCC 

5 

6 

7 

VEE 

R247 

120k 

R248 

5.6K 

C249 

4.7u6.3 

2SC2412K 

Q251 

FB 

R63 

0 

D62 

MA2S077 

1 

NC 

2 

SUB 

3 

GND 

4 

VOUT 

5 

VCC 

IC34 

BD4732G 

1 

NC 

2 

SUB 

3 

GND 

4 

VOUT 

5 

VCC 

J1 

F1 

FB 

C282 

330u25 

2SC5488 

Q351 

R355 

470 

C355 

18p 

C354 

4.5p 

C356 

3p 

R358 

220 

R361 

180 

C367 

150p 

R363 

330k 

C369 

3p 

L354 

50n 

L355 

50n 

D351 

HVC376B 

C368 

27p 

R367 

100 

C373 

6p 

C374 

27p 

D352 

HVC376B 

3SK318 

Q352 

G1 

D 

S 

G2 

3SK318 

Q353 

G1 

D 

S 

G2 

R372 

47k 

R374 

27k 

L356 

50n 

C382 

27p 

C386 

36p 

L357 

35.5n 

D353 

HVC376B 

D354 

HVC376B 

C388 

7p 

C390 

9p 

C391 

16p 

C471 

10p 

S1 

W02-3665-05 

C128 

1000p 

R126 

47k 

L423 

R114 

47k 

5M 

D407 

1SV278 

IC202 

BA10358FV 

1 

2 

3 

4 

5 

6 

7 

8 

VCC 

2SK1830 

Q354 

C385 

8p 

C381 

4.5p 

2SK3019 

Q252 

2SK3019 

Q253 

PD55003TR 

Q503 

C544 

15p 

C543 

15p 

KEC 

SPLATTER FILTER 

8TC(CPU80) 

FM DEMODULATION 

OR GATE 

W/NI(EVOL1) 

TP 

5C 

8TC 

RX VCO 

TX VCO 

CV 

VOTAGE 

DROPPED 

CHARGE PUMP 

MIC AMP/ 

IDC 

TCXO 

CURRENT 

PROTECTION 

IDC 

AGC 

BUFFER 

AMP 

BUFFER AMP 

TEMPERATURE 

COMPENSATION 

MIC 

CK(CPU54) 

TEMPERATURE 

COMPENSATION 

DT(CPU53) 

5M 

AUDIO 

FILTER 

SQIN(CPU93) 

WIDE(CPU65) 

B 

TXD 

DT(CPU53) 

HPF 

RXD 


OVER VOLTAGE 

DETECTION 

E 

VOLTAGE 

REGULATOR 

(8C) 

W/NO(EVOL2) 

RF SWITCH 

REVERSE 

CONNECTION 

PROTECTION 

DI 

PLLE(CPU3) 

NARROW 

FROO(EVOL23) 

APC CONTROLLER 

UL(CPU21) 

CK(CPU54) 

FINAL AMP 

PLLE(CPU3) 

8CL 

D603,605 

8CL 

LIPPLE 

FILTER 

DIGITAL 

POTENTIOMETER 

TEMPERATURE 

COMPENSATION 

NARROW(CPU64) 

1/2Vcc 

D31 

TV 

RX VCO 

MODI(EVOL9) 

TX VCO 

5M 

D351,352 

LIMITTER 

KDC 

PC/TV SW 

IF SWITCH 

RF BPF TUNING 

KEC 

PC 

D353,354 

IF AMP 

8T 

KEC 

Q402,403 

Q35,36 

APC VOLTAGE 

DETECT 

D405,406 

BEAT 

SHIFT 

BUFFER AMP 

VOLTAGE 

DETECTOR 

(RESET) 

D606,607 

8C 

D403,404 

50,4MHz 

ANT SW 

ANT SW 

D1-4 

VOLTAGE 

REGULATOR 

(5M) 

8TC(CPU80) 

8RC(CPU76) 

D32 

CV 

D501 

DRIVE AMP 

8R 

RX 

8R 

IF SWITCH 

1,1A 

W/NI(EVOL1) 

EEPROM 

RF AMP 

MIC AMP/ 

SPLATTER 

FILTER 

5C 

MOD 

DETECTION 

MODULATION 

8C 

VOLTAGE 

DETECTOR 

(INT) 

1/2Vcc 

CPU 

DC SW (SB) 

8C 

AGC/ 

MIC MUTE 

AFV 

AF MUTE 

AF MUTE 

W/NO(EVOL2) 

NOISE AMP/ 

SQL AMP 

T/R SW 

AFI(EVOL12) 

DIVIDER 

(HETERO) 

VOLTAGE 

PROTECTION 

PLL IC 

KEC 

AFM(CPU50) 

D407 

T/R SW 

Q33,34 

KEC 

8C 

SB 

OVER VOLTAGE 

DETECTION 

16.8MHz 

BEAT 

SHIFT 

MOD 

LIPPLE 

FILTER 

RF AMP 

VOLTAGE 

REGULATOR 

(5C) 

WIDE 


KEC 

RF AMP/ 

DRIVE STAGE 

AF MUTE 

MOD 

BUFFER AMP 

SUM AMP 

RF BPF TUNING 

AF MUTE 

MIXER 

RF AMP 

8R 

PLL SYNTHESIZER 

SEG9 

SEG15 

SEG7 

SEG10 

SEG23 

SEG3 

SEG21 

SEG11 

COM2 

SEG13 

COM1 

RESISTOR 

COM3 

SEG24 

KEY ILLUMINATION 

SEG1 

LCD (B38-0885-05) 

SEG17 

SEG27 

SEG29 

SEG4 

SEG26 

SEG31 

SEG5 

SEG14 

SEG18 

SEG19 

VARIABLE 

SEG8 

SEG12 

SEG2 

SEG20 

LCD ILLUMINATION 


SEG22 

MR 

SEG0 

SEG16 

COM0 

SEG6 

SEG28 

SEG25 

SEG30 

POWER 

SQC 

PKS 

PR1 

PR9 

PKD 

8RC(CPU76) 

IC252 

LA4600 

1 

2 

3 

4 

5 

6 

7 

8 

9 

10 

PTT 

BRI 

RXD 

POWER 

VOL 

8C 

5C 

DO 

CL 

CE 

DI 

MICKEY 

ENCB 

CM 

ENCA 

MIC 

ENCODER 

8TC(CPU80) 

AMPSW(CPU52) 

SPM(CPU51) 

BRI 

8RC(CPU76) 

VOLO(EVOL11) 

W/NO(EVOL2) 

MIC 

PC/TV 

LCD CONTROLLER 

KEY BACKLIT SWITCH 

DIMMER 

FUNCTION 

SWITCH 

LCD BACKLIT 

D2-4 

LCD BACKLIT SWITCH 

DC SWITCH 

KEY BACKLIT 

D19-30 

MHz & MENU 


ON/OFF & VOLUME 


SINGLE 

ANALOG SW 

SINGLE 

ANALOG SW 

DC SW (SB) 

DC SW (8R) 

DC SW (8T) 

MOD BUFFA 

1/2Vcc 

DC 

AMP 

Q201 

RF AMP/ 

DRIVE STAGE 

OVER VOLTAGE 

DETECTION 


D5,6 

BRI 

CM 

MICKEY 

VOL 

TV 

AUDIO AMP 

RIPPLE 

FILTER 

144-148MHz 

144-146MHz 

TM-271A 

TM-271E 

E 

K 

M3 

M2 

M4 

X57-685X-XX 

0-23 

0-10 

0-21 

0-22 

2-71 

1 

2 

3 

4 

5 

6 

7 

8 

9 

10 

CLK 

NC3 

DATA 

LE 

FC 

NC4 

FOUT 

P 

NC5 

R 

OSCIN 

NC1 

OSCOUT 

VP 

VCC 

DO 

GND 

LD 

NC2 

FIN 

2SC4649(N,P) 

Q404 

2SK508NV(K52) 

Q406 

2SJ347 

Q407 

2SK508NV(K52) 

Q405 

2SC5108(Y) 

Q410 

Q408 

KRX102U 

2SC2412K 

Q440 

CONT 

VDD 

2SK1830 

Q87 

X86 

8.00MHz 

L78-1409-05 

2SK1830 

Q86 

8 

9 

10 

11 

12 

13 

14 

1 

2 

3 

4 

5 

6 

7 

2VOLI 

2VOLO 

BLO 

BLI 

1VOLI 

1VOLO 

DO 

VDFref 

RESET 

GND 

FRQI 

FRQO 

PC/TVO 

PC/TVI 

VDD 

LD 

CLK 

DAT 

MODI 

MODO 

W/NO 

W/NI 

BRII 

BRIO 

QT/DQT(CPU1) 

1/2Vcc 

EVLLD(CPU8) 

UL(CPU21) 

PLLE(CPU3) 

M1MT(CPU76) 

XOUT(CPU11) 

XIN(CPU13) 


BSHIFT 

P9MT(CPU75) 

MICMT(CPU77) 

TX/RX (CPU20) 

W/NO(EVOL2) 

W/NI(EVOL1) 

MIC 

VOLO(EVOL11) 

VOLI(EVOL12) 

DT(CPU53) 

CK(CPU54) 

BRI 

PLLE(CPU3) 

MODO(EVOL10) 

PC/TV 

UL(CPU21) 

PC/TVO(EVOL3) 

EVLLD(CPU8) 

P9MT(CPU75) 

MICMT(CPU77) 

MOD 

TX/RX (CPU20) 

TX/RX (CPU20) 

QT/DQT(CPU1) 

EVLLD(CPU8) 


UL(CPU21) 

PLLE(CPU3) 

XOUT(CPU11) 

XIN(CPU13) 

POWER 

M1MT(CPU76) 

P9MT(CPU75) 

MICMT(CPU77) 

CK(CPU54) 

DT(CPU53) 

W/NO(EVOL2) 

PC/TV 

W/NI(EVOL1) 

MIC 

VOLI(EVOL12) 

VOLO(EVOL11) 

BRI 

SQIN(CPU93) 

RSSI(CPU92) 

SBC(CPU82) 

1/2Vcc 


BSHIFT 

IC101 


NC 

SQC 

PKS 

CLKFLS 

BSYFLS 

TXD 

RXD 

PTT 

NC 

NC 

NC 

EMPFLS 

NC 

NC 

NC 

NC 

CEFLS 

NC 

NC 

NC 

NC 

NC 

AFM 

EEPWP 

NC 

SPM 

AMPSW 

DT 

CK 

NC 

DST1 

DST2 

DST3 

DST4 

VCC 

NC 

VSS 

ADJ 

NARROW 

WIDE 

NC 

NC 

CL 

CE 

DO(to LCD) 

DI(from LCD) 

NC 

ENCB 

ENCA 

P9MT 

99 

100 

1 

2 

3 

4 

5 

6 

7 

8 

9 

10 

11 

12 

13 

14 

15 

16 

17 

18 

19 

20 

21 

22 

23 

24 

25 

SPM(CPU51) 

AMPSW(CPU52) 

W/NI(EVOL1) 

VOLI(EVOL12) 

SW1 

SW2 

OUT 

VCC2 

VCC1 

IN 

IN 

GND 

RD70HVF1-01 

Q504 

AMPSW(CPU52) 

MIC 

8TC(CPU80) 

SPM(CPU51) 

8RC(CPU76) 

BRI 

PC/TV 

VOLO(EVOL11) 

W/NO(EVOL2) 

2SC2412K 

Q301 

8 

9 

10 

11 

12 

13 

14 

IC251 

BA10324AFV 


INT(CPU18) 

RESET(CPU10) 

SBC(CPU82) 

1/2Vcc 

SQIN(CPU93) 

INT(CPU18) 

RESET(CPU10) 

SBC(CPU82) 

IC35 

BD4740G 

IC31 

KIA7808AF 

IC32 

NJM78L05UA 

AMPSW(CPU52) 

VOLO(EVOL11) 

SPM(CPU51) 

1 

2 

3 

4 

5 

6 

7 

8 

9 

10 

11 

12 

13 

14 

15 

16 

17 

18 

Func 

CALL 

VFO 

REV 

CM 

HOOK 

MIC 

ME 

PTT 

GND 

8C 

MBL(Key A) 

ENCODER A 

CM 

ENCODER B 

MIC KEY 

DI(from LCD) 

CE 

CL 

DO 

5C 

8C 

VOL 

POWER 

RXD 

BRI 

PTT 

GND 

ME 

MIC 

1 

2 

3 

4 

5 

6 

7 

8 

9 

10 

11 

12 

13 

14 

15 

16 

17 

18 

SDA 

SCL 

WP 

VCC 

SQIN(CPU93) 

SBC(CPU82) 

RESET(CPU10) 

INT(CPU18) 

1/2Vcc 


RSSI(CPU92) 

IC301 

TK14489V 

SCAN 

SCAN 

SQLIN 

FLAMPO 

RFIN 

GND 

Hy_C 

FLAMPI 

RSSI 

AFO 

VCC 

IF_IN 

DEC1 

DEC2 

PH_S 

QUCO 

OSC(B) 

OSC(E) 

NC 

MIX_O 

1 

2 

3 

4 

5 

6 

7 

8 

9 

10 11 

12 

13 

14 

15 

16 

17 

18 

19 

20 

2SB1132(Q,R) 

Q9 

IC3 

LC75854W 

or 

PT6554LQ 

1 

2 

3 

4 

5 

6 

7 

8 

9 

10 

11 

12 

13 

14 

15 

16 SEG28 

SEG29 

SEG30 

SEG31 

NC 

NC 

NC 

COM0 

COM1 

COM2 

COM3 

KS1 

KS2 

NC 

NC 

NC 

SEG12 

SEG13 

SEG14 

SEG15 

SEG16 

SEG17 

SEG18 

SEG19 

SEG20 

SEG20 

SEG22 

SEG23 

SEG24 

SEG25 

SEG26 

SEG27 

C203 

0.027u 

0.027u 

0.047u 

0.027u 

0.027u 

1000p 

1000p 

680p 

1000p 

C206 

1000p 0.022u 

0.022u 

0.022u 

0.022u 

C207 

0.039u 

NO 

C614 

3p 

NO 

NO 

NO 

0 

0 

R119 

0 

NO 

0 0 

0 

NO 

R120 

NO 

NO 

0 

R121 

0 

NO 

NO 

NO 

10k 

18k 

R204 

18k 

18k 

18k 

1M 

750k 

750k 

750k 

750k 

R207 

XF351 

49.95MHz 

L71-0620-05 

CF301 

L72-0993-05 

CF302 

L72-0999-05 

C259 

0.01u 

C260 

0.01u 

C270 

4.7u6.3 

R55 

0 

R:3.22V 

R:4.65V 

T:1.6V 

R:4.02V 

R:4.27V 

T:4.16V 

R:13.8V 

T:13.45V 

T:1.45V 

R:0.66V 

T:0.48V 

R:4.98V 

R:2.7V 

R:7.9V 

R:13.8V 

T:0.82V 

N:5V 

W:0V 

T:1.23V 

R:2.46V 

R:4.98V 

R:1.8mV(BS OFF) 

5V(BS ON) 

T:7.55V 

R:4.98V 

R:7.99V 

R:4.92V 

T:3.9mV 

R:13.66V 

T:12.94V 

R:7.04V 

R:7.42V 

R:4.90V 

R:0.74V 

T:0.62V 

R:4.31V 

R:3.37V 

R:6.11V 

R:6.17V 

R:4.84V 

T:5.73V 

4.98V 

R:7.9V 

R:0.75V 

R:1.15V 

R:0.71V 

R:0.56V 

R:3.37V 

R:4.7mV(SQ OFF) 

4.97V(SQ ON) 

R:2.48V 

R:1.44V 

R:7.7V 

R:6.34V 

R:6.64V 

R:4.98V 

N:0V 

W:5V 

T:1.26V 

R:1.74V 

T:6.8V 

R:3.3V 

T:0.88V 

4.97V 

R:4.98V 

R:6.96V 

T:6.8V 

T:7.82V 

R:0.97V 

R:7.9V 

R:4.96V 

T:0.76V 

T:7.84V 

R:1.23V 

R:7.95V 

R:2.8mV 

R:0.1mV 

R:0.76V 

R:4.05V 

R:7.98V 

R:5V 

R:7.01V 

R:2.7V 

7.30V 

7.90V 7.10V 

4.96V 

4.94V 

4.96V 

5.02V 

R:7.84V 

T:5.61V 

T:2.5V 

T:1.46V 

T:7.85V 

R:0.87V 

T:4.97V 

R:2.88V 

R:5.86V 

R:3.16V 

7.90V 

T:7.84V 

4.80V(BRIGHTNESS MAX) 

0V(BRIGHTNESS OFF)


38 

Q440 

2SC2412K 

DT 

P1M 

IC202 

BA10358FV 

SB 

D201 

DAN222 

D202 

1SS372 

KI1 

IC203 

BA10324 

(3/4) 

IC203 

BA10324AFV 

(1/4) 

D/A 

CONV 

MIC KEY 

M 

PLLE 

TCXOMOD 

AGC 

DET 


CK 

LOOP 

FILTER 

KS1 

8C 

ELV 

BUF 

MIC 

MUTE 

CE 

8CL 

IC201 

NJM2100V 

PLL IC 

8RC 

CK 

RF 

SBC 

SUM 

SW 

5C 

CM(MIC KEY2) 

DI 

V 

MIC 

8C 

LIPPLE 

FILTER 

D2~4 

B30-2205-05 

KEY BACK LIGHT 

ENCA 

SW 

BSH 

KS2 

RXD 

HOOK(RXD) 

AGC 


Q201 

2SC4919 

VCO 

Q403 

2SC4738(GR) 

TCXO 

D/A 

CONV 

WID 

POWER 

NAR 

MIC 

IC161 

M62363FP 

(3/8) 

CHARGE 

PUMP 

CHARGE 

PUMP 

16.8MHz 

IC161 

M62363FP(8/8) 

8TC 

BRI 

SQIN 

8C 

CM 

SPLATTER 

FILTER 

8C 

8C 

MIC KEY 

MIC/IDC 

Q404 

2SC4649(N,P) 

16.8MHz 

MIC 

PTT(TXD) 

DO 

ENCB 

KI3 

ME 

Q407 

2SJ347 

IC401 

MB15A02 

LD 

DT 

VOL 

T 

CV 

5C 

Q402 

2SA1832(GR) 

CL 

KI2 

DTM 

Q10 

KRA225S 

5C 

Q6 

KRC102S 

V 

PLLE 


Q 

2SK50 

MICMT 

D19~30 

B30-2205-05 

LCD BACK LIGHT 

Q9 

2SB1132(Q,R) 

Q12 

UMG3N 

SW 

MBL 

BRI 

IC3 

LCD DRIVER 

LC75854W/ 

LC75854W/ 

CL 

CE 

DI 

COM0~3 

SEG0~31 

MBL 

DO 

LCD 

GND 

ME 

MIC 

Q1 

2SK1824 

X401 

QT/D 

TX/R 

SPM 

AFM 

AMP 

PTT(TXD) 

Func 

CALL 

VFO 

REV 

MR 

KI1 

KI2 

KI3 

KS2 

KS1 

SQC 

PKS 

PR1 

PR9 

PKD 

VR1 

R31-0649-05 

VIARIABLE RESISTOR 

POWER 

D/A 

CONV 

IC161 

M62363FP 

(4/8) 

P9MT 

P1MT 

PKD1200 

PKD9600 

VOL 

P9M 

QT/DQT 

PKD9600 

IC205 

BU4S66 

SW 

IC204 

BU4S66 

SW 

ENCB 

MHz 

ENCA 

S1 

W02-3665-05 

ENCODER 

PKD1200 

BLOCK DIAGRAM


39 

BLOCK DIAGRAM 

DT 

Q33 

2SA1745(6,7) 

CF302 

(NARROW) 

D303 

DAN222 

P1MT 

SW 

8TC 

AVR 

5V 

X351 

49.95MHz 

8RC 

OVER 

VOLTAGE 

DETECT 

IC66 

AT24C64A10SI18 or 

CAT24WC64J1 

RF 

IC402 

UPB1509GV 

DIVIDER 

D302 

DAN222 

PC 

ANT 

Q87 

2SK1830 

IC203 

BA10324AFV 

(3/4) 

BUFF 

Vg 

V 

BUFFER 

D301 

MA742 

PLLE 

INT 

Vg 

450kHz 

SW 

BPF 

IC252 

LA4600 

NOISE 

D/A 

CONV 

IC501 

TA75W01FU 

(1/2) 

IC501 

TA75W01FU 

(2/2) 

WIDE 

ANT SW 

ELVLLD 

SW 

POWER 

PRE 

DRIVE 

AMP 

RF 

BUFF 

Q351 

2SC5108(Y) 

VCOMOD 

CL 

SW 

CF301 

(WIDE) 

D351,352 

HVC376B 

8RC 

CK 

IC251 

BA10324AFV 

Q353 

3SK318 

SBC 

TXRX 

8C 

IC31 

KIA7808AF 

AVR 

8V 

TEMP2 

MIX 

SW 

5M 

AF 

FILTER 

TX 

VCO 

SW 

Q411 

2SC4649 

(N,P) 

Q410 

2SC5108(Y) 

SW 

8T 

8CL 

D353,354 

HVC376B 

5C 

BSHIFT 

BSHIFT 

8R 

SW 

SW 

Q504 

RD70HVF1 

E 

Q35 

KTA1664(Y) 

D607 

MA742 

D606 

MA742 

50.4MHz 

B 

DET 

SW 

8R 

IC32 

NJM78L05UA 

5M 

SW 

VCOMOD 

R) 

WIDE 

NARROW 

EEPROM 

Q252,253 

2SK3019 

8R 

RESET 

NARROW 

D/A 

CONV 

IC33 

NJM78L05UA 

AVR 

IC161 

M62363FP 

(7/8) 

3FP 

BPF 

Q36 

KRC102S 

Q254 

DTC363EU 

IC161 

M62363FP(2/8) 

8T 

Q406 

2SK508NV(K52) 

IC35 

BD4740G 

5C 

RESET 

X86 

IC161 

M62363FP 

(5/8)(6/8) 

IC161 

M62363FP 

(1/8) 

IC34 

BD4732G 

DTMF/BEEP 

8TC 

SQIN 

Q32 

KRC102S 

SBC 

Q251 

2SC2412K 

PTT 

FINAL 

AMP 

8C 

SPM 

MICMT 

SIGNAL 

Q34 

KRC102S 

8T 

DRIVE 

AMP 

SB 

+B 

IF 

DEMODULATOR 

AF 

PA 

AFM 

SW 

CPU 

IC101 


MCF 

INT 

Q407 

2SJ347 

D602 

MA4PH633 

D603,605 

XB15A709 

SW 

8T 

8T 

Q61 

KRC404RTK 

Q302 

2SC2412K 

TRIPLER 

INT 

TEMP1 

APC 

CONTROL 

SW 

RXD 

TCXOMOD 

D/A 

CONV 

CM 

CV 

R) LPF 

8R 

POW. 

DET 

POW. 

DET 

SW 

D/A 

CONV 

RF 

Q503 

PD55003 

Q408 

KRX102U 

Q86 

2SK1830 

T/R 

SW 

HPF 


5M 

Q301 

2SC2412K 

IF 

Q501 

2SC3357 

D409 

DAN235E 

EXT. 

SP 

16.8MHz 

Q352 

3SK318 

Q31 

2SA1641(S,T) 

RX 

VCO 

RF BPF 

TUNE 

RF BPF 

TUNE 

8R 

SP 

Q502 

2SC3357 

Q405 

2SK508NV(K52) 

EEPWP 

EEPCK 

EESDT 

IC301 

SW 

Q255 

KRC102S 

AMPSW 

Q354 

2SK1830 

SW 

8T 

QT/DQT 

TX/RX 

SPM 

AFM 

AMPSW 

CL 

CE 

DI 

RSSI 

SQIN 

8C 

8M 

PKS 

SQC 

ENCA 

ENCB 

VOL 

P9MT 

DO 

MICKEY2 

MICKEY 

RESET


LEVEL DIAGRAM 

Receiver Section 

Center Frequency 

49.95MHz 

450kHz 

W: –77.6dBm 

N : –74.2dBm 

W: –124.0dBm 

N : –123.5dBm 

W: –119.5dBm 

N : –119.0dBm 

W: –104.7dBm 

N : –103.7dBm 

W: –103.9dBm 

N : –103.4dBm 

W: –112.3dBm 

N : –111.5dBm 

W: –92.1dBm 

N : –90.7dBm 

CF1 

/CF2 

ANT 

BPF 

Q353 

G2 D 

G1 S 

BPF 

Q352 

G2 D 

G1 S 

XF1 

Q351 

20 

IC301 

To make measurements in the RF section, connect the RF level meter. 

In the RF section, use a 0.01µF coupling capacitor. 

(The display shows the SSG input value required to obtain 12dB SINA 

Transmitter Section 

Display 

Unit 

X54-345 

W/N 

5.0mVrms (2.0mVrms for E-type) 

TX-RX Unit 

TX-RX U 

W/N 

0.12Vrms 

W/N 

1.40Vrms 

W/N 

1.16Vrms 

W/N 

1.26Vrms 

W/N 

1.04Vrms 

W: 0.75Vrms 

N : 0.36Vrms 

W: 0.30Vrms 

N : 0.18Vrms 

MIC 

IC201 IC201 IC202 IC202 IC203 IC203 

2 1 6 7 3 1 5 7 2 1 9 8 

9 

IC161 

10 

Q406 

To make measurements in the AF section, connect the AC level meter. 

AG is set so that MIC input becomes 3kHz/1.5kHz (Wide/Narrow) DEV at 1kHz MOD. 

To make 

40

LEVEL DIAGRAM 


450kHz 

Audio Frequency 

W: –85.0dBm 

N : –84.5dBm 

CF1 

/CF2 

W/N 

0.33Vrms 

W/N 

0.32Vrms 

W/N 

0.26Vrms 

W/N 

0.30Vrms 

W/N 

0.31Vrms 

W/N 

10mVrms 

W/N 

0.50Vrms 

W/N 

0.64Vrms 

IC301 

11 

IC251 IC251 IC251 IC251 

IC161 IC252 

Q251 

9 8 12 14 3 1 5 7 

12 11 10 1 J1 

8ohm 

vel meter. 

12dB SINAD.) 

To make measurements in the AF section, connect the AC level meter. 

(ANT input : –53dBm, 1kHz FM, 3kHz DEV (Wide)/1.5kHz DEV (Narrow)) 

The AF output level is adjusted for a 0.64V/8Ω by the front panel AF VOL control. 

TX-RX Unit (VCO) 

TX-RX Unit 

FINAL Amp 

TX-RX Unit 

–5.3dBm –10dBm –4.8dBm –8.8dBm 12.5dBm 26.5dBm 

60W 

Q406 

Q410 

2 

IC402 

1 

Q411 

D409 

Q501 

Q502 

Q503 

D 

Q504 

D 

D602 

ANT 

G 

S 

G 

S 

To make measurements in the RF section, connect the RF Wattmeter (50Ω). 

41


SPECIFICATIONS 

GENERAL 

Frequency Range 

TX ............................................................................................ K,M4 : 144~148MHz E : 144~146MHz M2,M3 : 136~174MHz 

RX ............................................................................................ K,E,M2,M3 : 136~174MHz M4 : 144~148MHz 

Mode .......................................................................................... F3E (FM) 

Antenna Impedance .................................................................. 50Ω 

Usable Temperature Range ...................................................... –20°C~+60°C (–4°F~+140°F) 

Power Supply ............................................................................. 13.8V DC± 15% (11.7~15.8V) 

Grounding Method .................................................................... Negative ground 

Current 

Transmit (max.) ...................................................................... K,E,M2,M3 : 13A or less M4 : 8A or less 

Receive (at 2W output) ......................................................... 1.0A or less 

Frequency Stability (–20°C~+60°C) ......................................... Within ± 2.5ppm 

Dimensions (W x H x D projections not included) ..................... 160 x 43 x 137 mm / 6-5/16 x 1-11/16 x 5-13/32 inch 

Weight ........................................................................................ Approx. 1.2kg / 2.6lb 

RECEIVER 

Circuitry ....................................................................................... Double conversion superheterodyne 

Intermediate Frequency (1st / 2nd) ............................................ 49.95MHz / 450kHz 

Sensitivity (12dB SINAD) ............................................................ Wide : 0.18µV or less Narrow : 0.22µV or less 

Selectivity 

–6dB ........................................................................................ Wide : 12kHz or more Narrow : 10kHz or more 

–60dB ...................................................................................... Wide : 30kHz or less Narrow : 24kHz or less 

Squelch Sensitivity ..................................................................... 0.1µV or less 

Audio Output (8Ω, 5% distortion) .............................................. 2W or higher (5% distortion) 

Audio Output Impedance ........................................................... 8Ω 

TRANSMITTER 

Power Output 

High ......................................................................................... K,E,M2,M3 : 60W M4 : 25W 

Low ......................................................................................... K,E,M2,M3 : Approx. 25W 

Modulation .................................................................................. Reactance modulation 

Spurious Emissions .................................................................... –60dB or less 

Maximum Frequency Deviation ................................................. Wide : ± 5kHz Narrow : ± 2.5kHz 

Audio Distortion (at 60% modulation) ........................................ 3% or less 

Microphone Impedance ............................................................. 600Ω 

Note : All specifications (General, 

Transmitter and Receiver) are guaranteed 

within the amateur radio band. 

Guarantee K,M2,M3,M4 E 

frequency range 144~148MHz 144~146MHz 

KENWOOD CORPORATION 

2967-3, Ishikawa-machi, Hachioji-shi, Tokyo, 192-8525 Japan 

KENWOOD U.S.A. CORPORATION 

P.O. BOX 22745, 2201 East Dominguez Street, Long Beach, CA 90801-5745, U.S.A. 

KENWOOD ELECTRONICS CANADA INC. 

6070 Kestrel Road, Mississauga, Ontario, Canada L5T 1S8 

KENWOOD ELECTRONICS DEUTSCHLAND GMBH 

Rembrücker Str. 15, 63150 Heusenstamm, Germany 

KENWOOD ELECTRONICS BELGIUM N.V. 

Leuvensesteenweg 248 J, 1800 Vilvoorde, Belgium 

KENWOOD ELECTRONICS FRANCE S.A. 

13, Boulevard Ney, 75018 Paris, France 

KENWOOD ELECTRONICS U.K. LIMITED 

KENWOOD House, Dwight Road, Watford, Herts., WD18 9EB United Kingdom 

KENWOOD ELECTRONICS EUROPE B.V. 

Amsterdamseweg 37, 1422 AC Uithoorn, The Netherlands 

KENWOOD ELECTRONICS ITALIA S.p.A. 

Via G. Sirtori, 7/9 20129 Milano, Italy 

KENWOOD IBERICA S.A. 

Bolivia, 239-08020 Barcelona, Spain 

KENWOOD ELECTRONICS AUSTRALIA PTY. LTD. 

(A.C.N. 001 499 074) 

16 Giffnock Avenue, Centrecourt Estate, North Ryde, N.S.W. 2113 Australia 

KENWOOD ELECTRONICS (HONG KONG) LTD. 

Unit 3712-3724, Level 37, Tower one Metroplaza, 223 Hing Fong Road, Kwai Fong, N.T., Hong Kong 

KENWOOD ELECTRONICS TECHNOLOGIES(S) PTE LTD. 

Sales Marketing Division 

1 Ang Mo Kio Street 63, Singapore 569110

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