Icom IC-910H Bedienungsanleitung

SERVICEMANUALVHF/UHF ALL MODE TRANSCEIVERi910H

• Opening the PA unit coverq Remove the top cover as shown in the diagram on p. 3-1.w Remove 8 screws and grounding plate from the PA unitcover.e Remo

• UT-102 VOICE SYNTHESIZER UNITq Remove the bottom cover as shown in the diagram on p. 3-1.• Remove the UX-910 if you have installed it. (p. 3-1)w Rem

• CR-293 HIGH STABILITY CRYSTAL UNITq Remove the bottom cover as shown in the diagram on p. 3-1.• Remove the UX-910 if you have installed it. (p. 3-1)

SECTION 4 CIRCUIT DESCRIPTION4 - 14-1 RECEIVER CIRCUITNote: [Main]=Main band, [Sub]=Sub band4-1-1 VHF TRANSMIT/RECEIVE SWITCHING CIRCUIT (PA UNIT)Rece

4 - 24-1-6 10 MHz IF CIRCUIT (MAIN UNIT)The 10 MHz IF signal from the mixer circuit is passedthrough a monolithic filter (Fl51 [Main], Fl651 [Sub]) to

4 - 34-1-11 NOISE BLANKER CIRCUIT (MAIN UNIT)The noise blanker circuit detects pulse-type noises, andstops IF amplifier operation during detection.A p

4 - 4While in SSB mode, the amplified signals from the bufferamplifier (Q1651) are then applied to the balanced modula-tor (IC201).While in AM/FM mode

4 - 5low-pass filter and UHF signal are high-pass filter, and thenapplied to the VHF and UHF power amplifier circuit sepa-rately.4-2-7 POWER AMPLIFIER

4 - 6The passed signals are then applied to the RF amplifier cir-cuit.4-4-2 1200 MHz RF CIRCUIT (for RX)Received signals from the transmit/receive swi

SECTION 5 ADJUSTMENT PROCEDURES5 - 14-1 PREPARATION BEFORE SARVICING REQUIRED TEST EQUIPMENTDC power supplyRF power meter(terminated type)Frequency c

INTRODUCTIONThis service manual describes the latest service informationfor the IC-910H VHF/UHF ALL MODE TRANSCEIVER at thetime of publication.VERSION

5 - 25-2 PLL ADJUSTMENTS30.2 MHzLEVELREFERENCEFREQUENCY144M LOCKVOLTAGE440M LOCKVOLTAGEMAIN BFOLEVELSUB BFOLEVELADJUSTMENTADJUSTMENT ADJUSTMENT CONDIT

5 - 3X512Reference frequency adjustmentC402430M lock voltage adjustmentP251144M LO level check pointL193144M lock voltage adjustmentJ54130.2 MHz level

*This output level of a standard signal generator (SSG) is indicated as SSG’s open circuit.5 - 45-4 RECEIVER ADJUSTMENTSReceiver adjustments must be p

5 - 5L521144M receiver peak/gainadjustmentP501144M receiver peak/gaincheck pointR547L52L51144M peakadjustmentfor main bandL53• PA UNIT• MAIN UNITL353L

*This output level of a standard signal generator (SSG) is indicated as SSG’s open circuit.RECEIVER ADJUSTMENTS (continued)430 M PEAK(MAIN BAND)430 M

5 - 7L283L22L23430M peakadjustmentfor main bandL282• PA UNIT• MAIN UNITR61430M total gainadjustmentfor main bandCP701Noise blanker check point for sub

PA UNITPRESETTINGIDLINGCURRENT(for 144 M)(for 430 M)RF PEAK(for 430 M)(for 144 M)IF PEAKCARRIERSUPPRESSION• Preset R131, R135, R150, R650 (PA unit) to

5 - 9Idling currentadjustmentfor 144MR135R131R138• PA UNIT• MAIN UNITR3PA unit pre-settingP1RF peakpre-setting for 430MR150Idling current adjustmentfo

5 - 10IF TOTALGAINTOTAL GAIN(for 144 M)(for 430 M)Ic APCDRIVE LEVELLO LEAK(for 144 M)TRANSMITTER ADJUSTMENTS (continued)ADJUSTMENTADJUSTMENT ADJUSTMEN

5 - 11• PA UNIT• MAIN UNITR3Total gainadjustment for 430MIF total gain adjustmentR3IC APC adjustment IC APC pre-settingR1613CP1613Drive level adjustme

SECTION 1 SPECIFICATIONSSECTION 2 INSIDE VIEWS2 - 1 IC-910H . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

*This output level of a standard signal generator (SSG) is indicated as SSG’s open circuit.5 - 125-6 SOFTWARE ADJUSTMENTENTERINGSOFTWAREADJUSTMENTADJU

*This output level of a standard signal generator (SSG) is indicated as SSG’s open circuit.5 - 13SOFTWARE ADJUSTMENT (continued)ADJUSTMENTITEM (2)S-ME

*This output level of a standard signal generator (SSG) is indicated as SSG’s open circuit.5 - 14SOFTWARE ADJUSTMENT (continued)S-METER(SUB BAND)ADJUS

*This output level of a standard signal generator (SSG) is indicated as SSG’s open circuit.5 - 15SOFTWARE ADJUSTMENT (continued)ADJUSTMENTITEM (4)CENT

*This output level of a standard signal generator (SSG) is indicated as SSG’s open circuit.5 - 16SOFTWARE ADJUSTMENT (continued)ADJUSTMENTITEM (6)RF P

5 - 17SOFTWARE ADJUSTMENT (continued)TX POWER/METER(for 430 M)ADJUSTMENTITEM (8)DEVIATIONADJUSTMENT ADJUSTMENT CONDITION DISPLAY OPERATION• Connect an

*This output level of a standard signal generator (SSG) is indicated as SSG’s open circuit.5 - 185-7 UX-910 ADJUSTMENTS2ND LO LOCKVOLTAGE1ST LO LOCKVO

5 - 19CP5011st LO lock voltage check pointC332Power ballance adjustmentCP322Idling check pointCP321Idling check pointR13Idling adjustmentR67APC adjust

*This output level of a standard signal generator (SSG) is indicated as SSG’s open circuit.5 - 20UX-910 ADJUSTMENTS (continued)APC(POWER SET)ADJUSTMEN

5 - 21R67APC adjustmentCP15APC check pointCP311Pre-setting for APC adjustmentCP401APC check pointR61APC adjustmentR37APC adjustment

SECTION 1 SPECIFICATIONS1 - 1 GENERAL• Frequency coverage : (Unit: MHz)*1Optional UX-910 is installed.*2Guaranteed range is 144.0–148.0 MHz.*3Guarant

[DISPLAY BOARD]6-1 IC-910[FRONT UNIT]S.=Surface mountW1 8900006700 CABLE OPC-645 (N:6 L:60)W2 8900006700 CABLE OPC-645 (N:6 L:60)W3 8900006700 CABLE O

[DISPLAY BOARD][DISPLAY BOARD]S.=Surface mountR57 7030003640 S.RESISTOR ERJ3GEYJ 473 V (47 kΩ)R58 7030003590 S.RESISTOR ERJ3GEYJ 183 V (18 kΩ)R59 7030

S.=Surface mount[DISPLAY BOARD][DISPLAY BOARD]C56 4030006860 S.CERAMIC C1608 JB 1H 102K-T-AC57 4030012610 S.CERAMIC C2012 JB 1C 474K-T-AC71 4030006860

[PLL UNIT][RIT BOARD]S.=Surface mountR2 7210003090 VARIABLERV-316 (RK0972210C05 10KB/10KB)J1 6510022570 S.CONNECTOR 06FMN-BMTTR-A-TBTEP1 0910052661 PC

S.=Surface mount[PLL UNIT][PLL UNIT]L424 6200005720 S.COIL ELJRE 33NG-FL425 6200005700 S.COIL ELJRE 22NG-FL471 6200005010 S.COIL NL 252018T-100JL473 6

[PLL UNIT][PLL UNIT]S.=Surface mountR427 7030003300 S.RESISTOR ERJ3GEYJ 680 V (68 Ω)R474 7030003560 S.RESISTOR ERJ3GEYJ 103 V (10 kΩ)R475 7030003290 S

S.=Surface mount[PLL UNIT][PLL UNIT]C192 4030006860 S.CERAMIC C1608 JB 1H 102K-T-AC193 4030006860 S.CERAMIC C1608 JB 1H 102K-T-AC194 4030006910 S.CERA

[MAIN UNIT][PLL UNIT]S.=Surface mountC705 4030007160 S.CERAMIC C1608 CH 1H 181J-T-AC708 4030007110 S.CERAMIC C1608 CH 1H 680J-T-AC709 4030006900 S.CER

S.=Surface mount[MAIN UNIT][MAIN UNIT]Q707 1590001660 S.TRANSISTOR XP4312 (TX)Q751 1590001660 S.TRANSISTOR XP4312 (TX)Q752 1590001660 S.TRANSISTOR XP4

[MAIN UNIT][MAIN UNIT]S.=Surface mountL652 6150004210 COIL LS-480L653 6150004170 COIL LS-476L703 6150004880 S.COIL LS-513L704 6150004880 S.COIL LS-513

RECEIVER• Receive system : VHF SSB, CWSingle conversion superheterodyneFMDouble conversion superheterodyneUHF SSB, CWDouble conversion superheterody

S.=Surface mount[MAIN UNIT][MAIN UNIT]R364 7030003320 S.RESISTOR ERJ3GEYJ 101 V (100 Ω)R365 7030003550 S.RESISTOR ERJ3GEYJ 822 V (8.2 kΩ)R368 70300033

[MAIN UNIT][MAIN UNIT]S.=Surface mountR915 7030003520 S.RESISTOR ERJ3GEYJ 472 V (4.7 kΩ)R916 7030003780 S.RESISTOR ERJ3GEYJ 684 V (680 kΩ)R927 7030003

S.=Surface mount[MAIN UNIT][MAIN UNIT]R1679 7030003680 S.RESISTOR ERJ3GEYJ 104 V (100 kΩ)R1680 7030003560 S.RESISTOR ERJ3GEYJ 103 V (10 kΩ)R1681 70300

[MAIN UNIT][MAIN UNIT]S.=Surface mountC59 4030006900 S.CERAMIC C1608 JB 1E 103K-T-AC60 4030006900 S.CERAMIC C1608 JB 1E 103K-T-AC61 4030006900 S.CERAM

S.=Surface mount[MAIN UNIT][MAIN UNIT]C732 4030007140 S.CERAMIC C1608 CH 1H 121J-T-AC751 4030006900 S.CERAMIC C1608 JB 1E 103K-T-AC752 4030006900 S.CE

[MAIN UNIT][MAIN UNIT]S.=Surface mountC1667 4030011600 S.CERAMIC C1608 JB 1C 104KT-NC1668 4030011600 S.CERAMIC C1608 JB 1C 104KT-NC1669 4510004440 S.E

S.=Surface mount[PA UNIT][PA UNIT]IC40 1110004080 S.IC µPC2709T-E3IC200 1110003320 S.IC µPC2710T-E3IC240 1110003320 S.IC µPC2710T-E3IC501 1110004080 S

[PA UNIT][PA UNIT]S.=Surface mountL71 6200002630 S.COIL NL 252018T-R10JL72 6200002840 S.COIL NL 252018T-R22JL97 6200005680 S.COIL ELJRE 15NG-FL102 620

S.=Surface mount[PA UNIT][PA UNIT]R108 7030008190 S.RESISTOR ERJ12YJ330U (33 Ω)R110 7030003290 S.RESISTOR ERJ3GEYJ 560 V (56 Ω)R111 7030003400 S.RESIS

[PA UNIT][PA UNIT]S.=Surface mountR585 7030003230 S.RESISTOR ERJ3GEYJ 180 V (18 Ω)R586 7030003370 S.RESISTOR ERJ3GEYJ 271 V (270 Ω)R587 7030003420 S.R

2 - 1SECTION 2 INSIDE VIEWS2-1 IC-910H• MAIN AND PLL UNITSDDS IC(IC701: SC-1287)DDS gate array(IC131: SC-1246A)DDS gate array(IC331: SC-1246A)PLL unit

S.=Surface mount[PA UNIT][PA UNIT]C139 4030011210 S.CERAMIC GRM42-6 CH 330J 500PTC140 4030016580 S.CERAMIC GRH111 CH 390J 500PTC141 4030016580 S.CERAM

[PA UNIT][PA UNIT]S.=Surface mountC307 4030006860 S.CERAMIC C1608 JB 1H 102K-T-AC308 4030006860 S.CERAMIC C1608 JB 1H 102K-T-AC309 4510007540 ELECTROL

S.=Surface mount[PA UNIT][PA UNIT]C607 4030007070 S.CERAMIC C1608 CH 1H 330J-T-AC608 4030009920 S.CERAMIC C1608 CH 1H 050B-T-AC609 4030007030 S.CERAMI

[DRV BOARD][PA UNIT]S.=Surface mountF300 5210000130 FUSE FGB 4AF301 5220000230 HOLDER S-N5054 #01F302 5220000230 HOLDER S-N5054 #01W3 7030003860 S.JUM

S.=Surface mount[MAIN UNIT] — UX-9106-2 UX-910[MAIN UNIT]IC21 1150002020 IC M57762-02IC31 1110001220 S.IC BA4558F T1IC111 1110004080 S.IC µPC2709T-E3I

[MAIN UNIT] — UX-910[MAIN UNIT] — UX-910S.=Surface mountL285 6200006050 S.COIL LQP11A 6N8C00L286 6200006020 S.COIL LQP11A 3N9C00L287 6200006030 S.COIL

S.=Surface mount[MAIN UNIT] — UX-910[MAIN UNIT] — UX-910R288 7310002670 S.TRIMMER RV-143 (RH03A3AS2) 471R301 7030003320 S.RESISTOR ERJ3GEYJ 101 V (100

[MAIN UNIT] — UX-910[MAIN UNIT] — UX-910S.=Surface mountC65 4030011600 S.CERAMIC C1608 JB 1C 104KT-NC66 4030006850 S.CERAMIC C1608 JB 1H 471K-T-AC67 4

S.=Surface mount[MAIN UNIT] — UX-910[MAIN UNIT] — UX-910C287 4030006880 S.CERAMIC C1608 JB 1H 472K-T-AC288 4030009530 S.CERAMIC C1608 CH 1H 030B-T-AC2

[MAIN UNIT] — UX-910[MAIN UNIT] — UX-910S.=Surface mountC731 4030007050 S.CERAMIC C1608 CH 1H 220J-T-AC732 4030007050 S.CERAMIC C1608 CH 1H 220J-T-AC7

2 - 2• PA UNITTX balanced mixer Q501, Q502: 2SK302 D502: 1SV286RX balanced mixer(Q511, Q512: 2SK1740)Pre-amplifier(Q507: 3SK177)145 MHz power amplifie

EP1 6910012480 RMS20-250-201-1R 1EP2 6450001230 HLJ0999-01-480 1MP1 8210017280 2355 front panel assembly 1MP2 8310048750 2355 window plate 1MP4 893005

MP1 8930014140 Earth spring (D) 1MP7* 8510012310 2157 DBM case 1MP8* 8510013620 2355 A-filter case 1MP9* 8510002020 MIX shield case 1MP10* 8510012310

8 - 1• TRANSISTORS AND FET’SSECTION 8 SEMI-CONDUCTOR INFORMATIONBECBECBECBCEBECBECBBEECCBECBECBECBEEEECBECBECBCEBECBECBECBECBEEEECBECBECECBEECBEBECBEC

8 - 2G1G2SDG1G2SDDSG2G1BECBECBECBECBECBECBECB1EB2C1C2BECE1B1B2C1C2E1C2B1C1E2B2E1C2B1C1E2B2E1C2B1C1E2B2GSDSGSSDGSSSSDGSDGDS2SK2855 2SK2973 2SK2975 3SK

8 - 3• DIODESCA1A2ACCA1A2ApinkCACA1A2C1C2NCACCA1A2ACA1C2C1A1C2C1ACACAC ACACACAC ACACACACACACred dotAC1SS301 1SS355 1SS375-TL 1SS385 1SV214 1SV217 1SV2

9 - 19-1 VR-A BOARDSECTION 9 BOARD LAYOUTS• TOP VIEWGNDJ1261to DISPLAY board J25MAVRNCNCMSVR+5V• TOP VIEWGNDJ1261to DISPLAY board J105RIVRNCNCSFVR+5V9

9 - 2• BOTTOM VIEW (RIT BOARD) • BOTTOM VIEW (VR-A BOARD)• BOTTOM VIEW (VR-B BOARD)

Communication EquipmentHimmelgeister Str. 100, D-40225 Düsseldorf, GermanyPhone : 0211 346047 Fax : 0211 333639URL : http://www.icomeurope.comUnit 9,

1-1-32, Kamiminami, Hirano-ku Osaka 547-0003, JapanS-13714HZ-C1© 2001 Icom Inc.

2 - 32-2 UX-910 (OPTIONAL UNIT)• TOP VIEW• BOTTOM VIEWPower module IC(IC21: M57762-02)1st LO VCO circuitPLL IC(IC501: TB31242)DDS IC(IC661: SC-1246A)R

SECTION 3 DISASSEMBLY AND OPTION INSTRUCTIONS• Opening the transceiver’s caseFollow the case and cover opening proceduresshown here when you want to i