TK-880/H (UHF) mobile service manual - The Repeater Builder's ...

ADJUSTMENT
TK-880/H
Adjustment Location
■ Switch
■ Adjustment Point
POWER
BUSY/
TX LED
MODULAR
MIC JACK
VOLUME
DOWN
VOLUME
UP
SUB
DISPLAY
PRIORITY
MONITOR
SERVICE
SCAN
AUXILIAY
HANDSET
MAIL
MONITOR
PROGRAMMABLE
SCAN
ALPHANUMERIC FUNCTION KEYS
DISPLAY
SYSTEM UP
(Trunking Format)
GROUP UP
(Conventional Format)
SYSTEM DOWN
(Trunking Format)
GROUP DOWN
(Conventional Format)
■ Note
• Flash memory
The firmware program (User mode, Test mode, Tuning
mode, etc.) and the data programmed by the FPU (KPG-49D)
for the flash memory, is stored in memory. When parts are
changed, program the data again.
• EEPROM
The tuning data (Deviation, Squelch, etc.) for the
EEPROM, is stored in memory. When parts are changed,
readjust the transceiver.
TP1
VR1
TX-RX UNIT (A/2)
PLL/VCO
TC109
TC106
L6
Repair Jig (Chassis)
Use jig (Part No. : A10-4010-02) for repairing the TK-880/
880H. The jig facilitates the voltage check when the voltage
on the component side TX-RX unit (A/2) is checked during
repairs.
Common Section
Measurement
Adjustment
Item
Condition
Testequipment
Unit Terminal Unit Parts Method
Specifications/Remarks
1. PLL lock 1) Set test mode DVM TX-RX TP1 PLL TC106 1.5V : K,HK ± 0.1V
voltage CH : CH3 - Sig1 Power meter (A/2) 2.5V : K2,HK2
PTT : ON (Transmit) F. conter TC109 3.5V : K3,HK3
2) CH : CH2 - Sig1 Check 8.0V or less
PTT : ON (Transmit)
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