IC-910H Service manual - n7tgb

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SECTION 1 SPECIF<strong>IC</strong>ATIONS ■ GENERAL • Frequency coverage : (Unit: MHz) • Mode • No. of memory Ch. • Antenna connector • Usable temp. range • Frequency stability • Frequency resolution • Power supply Version 144 MHz 430 (440) MHz 1200 MHz* 1 U.S.A. Tx: 144.0–148.0 Tx: 430.0–450.0 Tx: 1240.0–1300.0 Rx: 136.0–174.0* 2 Rx: 420.0–480.0* 3 Rx: 1240.0–1320.0* 4 Europe 144.0–146.0 430.0–440.0 1240.0–1300.0 Australia 144.0–148.0 430.0–450.0 1240.0–1300.0 Korea 144.0–146.0 430.0–440.0 1260.0–1300.0 * 1 Optional UX-910 is installed. * 2 Guaranteed range is 144.0–148.0 MHz. * 3 Guaranteed range is 430.0–450.0 MHz. * 4 Guaranteed range is 1240.0–1300.0 MHz. : USB, LSB, CW, FM, FM-N* *Not available in 1200 MHz band : 212 (99 regular, 6 scan edges, 1 calls for each band) plus 10 satellite memories) : SO-239 (50 Ω; VHF) Type-N (50 Ω; UHF) : –10˚C to +60˚C; +14˚F to +140˚F : Less than ±3 ppm (–10 to 60˚C; +14 to +140˚F) : 1 Hz minimum : 13.8 V DC ±15% (negative ground) • Current drain (at 13.8 V DC) : Transmit Max. power 23.0 A Receive Standby 2.0 A (3.0 A with UX-910) Max. audio 2.5 A (3.5 A with UX-910) • Dimensions : 241(W) × 94(H) × 239(D) mm (projections not included) 9 1 ⁄2(W) × 3 11 ⁄16(H) × 9 13 ⁄32(D) in • Weight (approx.) : 4.5 kg; 10 lb (with UX-910: 5.35 kg; 11 lb 13 oz) • ACC 1 connector : 8-pin DIN connector • CI-V connector : 2-conductor 3.5 (d) mm (1⁄8″) • DATA connectors : 6-pin mini DIN × 2 (for MAIN and SUB) ■ TRANSMITTER • Output power : (continuously adjustable) 144 MHz 5–100 W 430 (440) MHz 5–75 W 1200 MHz 1–10 W (with UX-910) • Modulation system : SSB Balanced modulation FM Variable reactance modulation • Spurious emission : 144/430 (440) MHz More than 60 dB 1200 MHz More than 50 dB • Carrier suppression : More than 40 dB • Unwanted sideband : More than 40 dB suppression • Microphone connector : 8-pin connector (600 Ω) • KEY connector : 3-conductor 3.5(d) mm ( 1 ⁄4″) All stated specifications are subject to change without notice or obligation. 1 - 1
■ RECEIVER • Receive system : VHF SSB, CW Single conversion superheterodyne FM Double conversion superheterodyne UHF SSB, CW Double conversion superheterodyne FM Triple conversion superheterodyne • Intermediate frequencies : (Unit: MHz) 144 MHz 430 (440) MHz 1200 MHz • Sensitivity : SSB, CW (10 dB S/N) Less than 0.11 µV FM (12 dB SINAD) Less than 0.18 µV • Squelch sensitivity : SSB, CW Less than 1.0 µV (threshold) FM Less than 0.18 µV • Selectivity : SSB, CW More than 2.3 kHz/–6 dB Less than 4.2 kHz/–60 dB* FM More than 15.0 kHz/–6 dB Less than 30.0 kHz/–60 dB* FM-N More than 6.0 kHz/–6 dB Less than 18.0 kHz/–36 dB CW-N (w/FL-132 or FL-133) MAIN BAND SUB BAND 1st 2nd 3rd 1st 2nd 3rd SSB 10.8500 — — 10.9500 — — CW 10.8491 — — 10.9491 — — FM 10.8500 0.455 — 10.9500 0.455 — SSB 71.2500 10.8500 — 71.3500 10.9500 — CW 71.2491 10.8491 — 71.3491 10.9491 — FM 71.2500 10.8500 0.455 71.3500 10.9500 0.455 SSB 243.9500 10.8500 — 243.9500 10.9500 — CW 243.9491 10.8491 — 243.9491 10.9491 — FM 243.9500 10.8500 0.455 243.9500 10.9500 0.455 More than 0.5 kHz/–6 dB Less than 1.34 kHz/–60 dB* *Except 1200 MHz band • Spurious and image rejection ratio: 144/430 (440) MHz More than 60 dB 1200 MHz More than 50 dB • AF output power (at 13.8 V DC): More than 2.0 W at 10% distortion with an 8 Ω load • RIT variable range : 144/430 (440) MHz ±1.0 kHz (SSB, CW) ±5.0 kHz (FM) 1200 MHz ±2.0 kHz (SSB, CW) ±10.0 kHz (FM) • IF SHIFT variable range : More than ±1.2 kHz • PHONES connector : 3-conductor 6.35(d) mm ( 1 ⁄4″) • Ext. SP connectors : 2-conductor 3.5 (d) mm ( 1 ⁄8″) /8 Ω × 2 (for MAIN and SUB) 1 - 2
Page 1 and 2: SERVICE MANUAL VHF/UHF ALL MODE TRA
Page 3: TABLE OF CONTENTS SECTION 1 SPECIFI
Page 7 and 8: • PA UNIT TX/RX switching relay (
Page 9 and 10: SECTION 3 DISASSEMBLY AND OPTION IN
Page 11 and 12: • UT-102 VOICE SYNTHESIZER UNIT q
Page 13 and 14: SECTION 4 CIRCUIT DESCRIPTION 4-1 R
Page 15 and 16: 4-1-11 NOISE BLANKER CIRCUIT (MAIN
Page 17 and 18: low-pass filter and UHF signal are
Page 19 and 20: SECTION 5 ADJUSTMENT PROCEDURES 4-1
Page 21 and 22: • PLL AND MAIN UNITS R570 30.2 MH
Page 23 and 24: • PA UNIT 144M receiver peak/gain
Page 25 and 26: • PA UNIT 430M peak adjustment fo
Page 27 and 28: • PA UNIT P501 RF peak pre-settin
Page 29 and 30: • MAIN UNIT R202 Drive level adju
Page 31 and 32: SOFTWARE ADJUSTMENT (continued) ADJ
Page 37 and 38: CP321 Idling check point CP322 Idli
Page 39 and 40: R67 APC adjustment CP401 APC check
Page 41 and 42: [DISPLAY BOARD] REF ORDER NO. NO. D
Page 43 and 44: [RIT BOARD] REF ORDER NO. NO. R2 72
Page 45 and 46: [PLL UNIT] REF ORDER NO. NO. DESCRI
Page 47 and 48: [PLL UNIT] REF ORDER NO. NO. DESCRI
Page 49 and 50: [MAIN UNIT] REF NO. ORDER NO. DESCR
Page 51 and 52: [MAIN UNIT] REF NO. ORDER NO. DESCR
Page 53 and 54: [MAIN UNIT] REF ORDER NO. NO. DESCR
Page 55 and 56:
[MAIN UNIT] REF NO. ORDER NO. DESCR
Page 57 and 58:
[PA UNIT] REF NO. ORDER NO. DESCRIP
Page 59 and 60:
[PA UNIT] REF ORDER NO. NO. DESCRIP
Page 61 and 62:
Page 63 and 64:
Page 65 and 66:
[MAIN UNIT] — UX-910 REF NO. ORDE
Page 67 and 68:
[MAIN UNIT] — UX-910 REF ORDER NO
Page 69 and 70:
[MAIN UNIT] — UX-910 REF ORDER NO
Page 71 and 72:
[PA UNIT] REF. NO. ORDER NO. DESCRI
Page 73 and 74:
2SK2855 2SK2973 2SK2975 3SK131 T2 L
Page 75 and 76:
SECTION 9 9-1 VR-A BOARD • TOP VI
Page 77 and 78:
1-1-32, Kamiminami, Hirano-ku, Osak
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