Icom IC-910H Service Manual
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Icom IC-910H Service Manual

Vhf/uhf all mode transceiver
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SERVICE
MANUAL
VHF/UHF ALL MODE TRANSCEIVER
i910H

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Summary of Contents for Icom IC-910H

  • Page 1 SERVICE MANUAL VHF/UHF ALL MODE TRANSCEIVER i910H...
  • Page 2 This service manual describes the latest service information NEVER connect the transceiver to an AC outlet or to a DC for the IC-910H VHF/UHF ALL MODE TRANSCEIVER at the power supply that uses more than 16 V. This will ruin the transceiver.

  • Page 3: Table Of Contents

    IC-910H ........
  • Page 4 SECTION 1 SPECIFICATIONS I GENERAL • Frequency coverage (Unit: MHz) Version 144 MHz 430 (440) MHz 1200 MHz* Tx: 144.0–148.0 Tx: 430.0–450.0 Tx: 1240.0–1300.0 U.S.A. Rx: 136.0–174.0* Rx: 420.0–480.0* Rx: 1240.0–1320.0* 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...
  • Page 5 I RECEIVER • Receive system SSB, CW Single conversion superheterodyne Double conversion superheterodyne SSB, CW Double conversion superheterodyne Triple conversion superheterodyne • Intermediate frequencies (Unit: MHz) MAIN BAND SUB BAND 10.8500 — — 10.9500 — — 10.8491 — — 10.9491 —...

  • Page 6: Inside Views

    SECTION 2 INSIDE VIEWS 2-1 IC-910H • MAIN AND PLL UNITS 2 - 1...
  • Page 7 • PA UNIT 2 - 2...
  • Page 8 2-2 UX-910 (OPTIONAL UNIT) • TOP VIEW Power supply circuit for AG-1200 Q72: DTC144EU Q73, Q74: 2SC2712 RF pre-amplifier (Q281: NE34018) Power module IC RF amplifier (IC21: M57762-02) (Q271: 2SC5454) TX 1st mixer YGR amplifier (IC131: PC8163TB) (IC141: PC1878G) RX 1st mixer (IC241: PC2721) PLL IC (IC501: TB31242)
  • Page 9 SECTION 3 DISASSEMBLY AND OPTION INSTRUCTIONS • Opening the transceiver’s case Follow the case and cover opening procedures shown here when you want to install an optional unit or adjust the internal units, etc. q Remove the 5 screws from the top of the trans- ceiver and 4 screws from the sides, then lift up the top cover.
  • Page 10 • Opening the PA unit cover r Slide the PA unit cover as shown below. q Remove the top cover as shown in the diagram on p. 3- w Remove 8 screws and grounding plate from the PA unit cover. e Remove fastening tape from the inside power cable.
  • Page 11 • UT-102 VOICE SYNTHESIZER UNIT q Remove the bottom cover as shown in the diagram on UT-102 p. 3-1. • Remove the UX-910 if you have installed it. (p. 3-1) w Remove the protective paper attached to the bottom of the UT-102 to expose the adhesive strip.
  • Page 12 y Install the CR-293 and solder the leads. • CR-293 HIGH STABILITY CRYSTAL UNIT u Return the PLL unit, PLL shield cover and bottom cover q Remove the bottom cover as shown in the diagram on to their original positions. p.

  • Page 13: Receiver Circuit

    SECTION 4 CIRCUIT DESCRIPTION 4-1 RECEIVER CIRCUIT The filtered signals from the bandpass filter are mixed with 1st LO signals at the mixer circuit (Q511, Q512) to produce Note: [Main]=Main band, [Sub]=Sub band a 1st IF signal (10.85 MHz [Main] or 10.95 MHz [Sub]). The 1st LO signals (125.15 MHz–163.15 MHz) are PLL output 4-1-1 VHF TRANSMIT/RECEIVE SWITCHING frequency, which comes from the VHF VCO circuit (PLL unit;...
  • Page 14 4-1-6 10 MHz IF CIRCUIT (MAIN UNIT) 4-1-9 SQUELCH CIRCUIT (MAIN UNIT) The 10 MHz IF signal from the mixer circuit is passed (1) FM mode through a monolithic filter (Fl51 [Main], Fl651 [Sub]) to sup- A squelch circuit cuts out AF signals when no RF signal is press out-of-band signals.

  • Page 15: Transmitter Circuits

    4-1-11 NOISE BLANKER CIRCUIT (MAIN UNIT) 4-1-13 S-METER CIRCUIT (MAIN UNIT) The noise blanker circuit detects pulse-type noises, and The S-meter circuit indicates the relative received signal stops IF amplifier operation during detection. strength while receiving and changes depending on the received signal strength.
  • Page 16 While in SSB mode, the amplified signals from the buffer 4-2-4 TRANSMIT IF AMPLIFIER CIRCUIT amplifier (Q1651) are then applied to the balanced modula- (MAIN UNIT) tor (IC201). The modulated IF signal from a modulation circuit is applied to the IF amplifier circuit (Q1). The amplified IF signal is then While in AM/FM mode, the amplified signals from the buffer applied to the VHF/UHF transmit circuit (PA unit) via the VHF amplifier (Q1651) are applied to the limiter amplifier...

  • Page 17: Pll Circuits

    4-4 UX-910 (1200 MHz BAND UNIT) The APC (Automatic Power Control) circuit protects the UX-910 is an optional 1200 MHz band unit for IC-910H. This power amplifiers on the PA unit from excessive current. unit covers 1240–1300 MHz frequency range.
  • Page 18 (Q161, outputs it from pin 10. The output signal is passed through Q164), and then output to the MAIN unit of IC-910H via J311 the active filter (IC502, Q511, Q512) and is then applied to (pin 25 [Main], pin 1 [Sub]).

  • Page 19: Ic-910H

    TERMINATOR for software JIG cable (A) JIG cable (A) adjustment (page 5-12). 2.2 k 2.2 k 2-conductor 3.5 (d) mm (1/8") Shouten inner and outer plugs. IC-910H JIG cable (B) Audio generator +9 V 2.2 k [MIC] 5 - 1...

  • Page 20: Pll Adjustments

    5-2 PLL ADJUSTMENTS ADJUSTMENT MEASUREMENT POINT ADJUSTMENT ADJUSTMENT CONDITION VALUE UNIT LOCATION UNIT ADJUST 30.2 MHz • Display frequency: Any Connect an RF volt- –10 dBm (or more than R570 LEVEL • Receiving meter or spectram –11.5 dBm, when R570 analyzer to check is in maximum posi- point J541.
  • Page 21 • PLL AND MAIN UNITS R570 30.2 MHz level adjustment L193 144M lock voltage adjustment P701 P251 Sub BFO level 144M LO level check point check point CP100 X512 144M lock voltage Reference frequency check point adjustment P551 J541 Reference frequency 30.2 MHz level check point check point...

  • Page 22: Receiver Adjustments

    5-4 RECEIVER ADJUSTMENTS Receiver adjustments must be performed after software adjustment (0) and (1). SUB band must be OFF when adjusting MAIN band, or main AF volume (max.counter clockwise) and SQL volume (max. clockwise) must be set when adjusting SUB band. ADJUSTMENT MEASUREMENT POINT...
  • Page 23 • PA UNIT 144M receiver R547 peak/gain L521 adjustment P501 144M receiver peak/gain check point • MAIN UNIT R857 144M total gain adjustment for sub band 144M peak L353 adjustment L853 for main band L354 L852 R360 144M total gain L851 144M peak adjustment...
  • Page 24 RECEIVER ADJUSTMENTS (continued) ADJUSTMENT MEASUREMENT POINT ADJUSTMENT ADJUSTMENT CONDITION VALUE UNIT LOCATION UNIT ADJUST 430 M PEAK • Display frequency: 435.0200 MHz MAIN Connect digital Maximum voltage L22, (MAIN BAND) • Mode : FM multimeter or oscillo- L23, • Connect a standard signal generator scope to check point L282, to [UHF ANT] connector and set as:...
  • Page 25 • PA UNIT L283 430M peak L281 430M peak L282 adjustment adjustment L280 for sub band for main band 430M total gain adjustment for main band • MAIN UNIT CP851 430M peak check point for main band CP852 430M peak check point for sub band CP101 Noise blanker...

  • Page 26: Transmitter Adjustments

    5-5 TRANSMITTER ADJUSTMENTS ADJUSTMENT MEASUREMENT POINT ADJUSTMENT ADJUSTMENT CONDITION VALUE UNIT LOCATION UNIT ADJUST • Preset R131, R135, R150, R650 (PA unit) to max. counter clockwise. PA UNIT • Preset R3, R138, R503 (PA unit) to center position. PRESETTING • Preset C154, C659 (PA unit) to center position as illustration at right. IDLING •...
  • Page 27 • PA UNIT P501 RF peak pre-setting for 144 M C154 RF peak R503 adjustment PA unit pre-setting for 430M C659 RF peak adjustment for 430M R138 PA unit pre-setting Idling current R131 adjustment RF peak R135 for 144M pre-setting for 430M R650 R150 Idling current...
  • Page 28 TRANSMITTER ADJUSTMENTS (continued) ADJUSTMENT MEASUREMENT POINT ADJUSTMENT ADJUSTMENT CONDITION VALUE UNIT LOCATION UNIT ADJUST IF TOTAL • Display frequency: Any MAIN Connect an RF volt- –22 dBm MAIN GAIN • Mode : USB meter to check point • MIC gain : Center J51 via the JIG cable •...
  • Page 29 • MAIN UNIT R202 Drive level adjustment CP1613 IC APC pre-setting R1613 IC APC adjustment IF total gain adjustment IF total gain /Drive level check point • PA UNIT P501 IF total gain /Drive level pre-setting R503 Total gain adjustment for 144M Total gain R504 adjustment for 430M...

  • Page 30: Software Adjustment

    5-6 SOFTWARE ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITION DISPLAY OPERATION • Enter software adjustment mode: The display shows the selection ENTERING item scleen for the adjustment SOFTWARE 1 Turn power OFF. ADJUSTMENT mode, push [0]–[9] key to select 2 Terminate the [REMOTE] jack with a adjustment item.
  • Page 31 SOFTWARE ADJUSTMENT (continued) ADJUSTMENT ADJUSTMENT CONDITION DISPLAY OPERATION • Enter software adjustment mode (Refer Push [RIT] key to store the “S0” level ADJUSTMENT page 5-12). into memory, and to step next. ITEM (2) S-METER • Push [2] key to enter the S-meter adjust- ment (MAIN BAND) •...
  • Page 32 SOFTWARE ADJUSTMENT (continued) ADJUSTMENT ADJUSTMENT CONDITION DISPLAY OPERATION • Set an SSG as Push [RIT] key to store the “S0” level S-METER Frequency : 146.0200 MHz into memory, and to step next. (SUB BAND) Level : OFF • Receiving • Set an SSG as Push [RIT] key to store the “S9”...
  • Page 33 SOFTWARE ADJUSTMENT (continued) ADJUSTMENT ADJUSTMENT CONDITION DISPLAY OPERATION • Connect an SSG to [VHF ANT] connector Push [RIT] key to store the AFC cen- ADJUSTMENT and set as ter for FM mode into memory, and to ITEM (4) CENTER Frequency : 146.0200 MHz step next.
  • Page 34 SOFTWARE ADJUSTMENT (continued) ADJUSTMENT ADJUSTMENT CONDITION DISPLAY OPERATION • Enter software adjustment mode (Refer Push [RIT] key to strat transmitting. ADJUSTMENT page 5-12). ITEM (6) RF PEAK • Push [6] key to enter the RF peak adjust- ment for TX. •...
  • Page 35 SOFTWARE ADJUSTMENT (continued) ADJUSTMENT ADJUSTMENT CONDITION DISPLAY OPERATION • Connect an RF power meter to [UHF ANT] Push [RIT] key to strat transmitting. TX POWER/ connector. METER (for 430 M) Tune the [MAIN DIAL] to 75 W (High power). Push [RIT] key to store the adjustment value into memory, and to step next.
  • Page 36 5-7 UX-910 ADJUSTMENTS ADJUSTMENT MEASUREMENT POINT ADJUSTMENT ADJUSTMENT CONDITION VALUE UNIT LOCATION UNIT ADJUST 2ND LO LOCK • Connect an optional UX-910 (1200 MAIN Connect digital 2.6–3.8 V Verify VOLTAGE MHz band unit). (UX-910) multimeter or oscillo- • Display frequency: 1270.5000 MHz scope to check point •...
  • Page 37 APC adjustment CP321 Idling check point CP401 APC check point CP322 CP15 Idling check point APC check point R288 Attenuator adjustment C332 Power ballance APC adjustment adjustment Idling adjustment APC adjustment CP501 1st LO lock voltage check point Transmitter gain adjustment R224 Receiver gain...
  • Page 38 UX-910 ADJUSTMENTS (continued) ADJUSTMENT MEASUREMENT POINT ADJUSTMENT ADJUSTMENT CONDITION VALUE UNIT LOCATION UNIT ADJUST • Display frequency: 1270.0000 MHz Rear Connect 13 W Adjust • Mode : CW panel power meter to [12 SSG’s • Connect an SSG to the check point ANT].
  • Page 39 APC adjustment CP401 APC check point CP15 APC check point APC adjustment APC adjustment CP311 Pre-setting for APC adjustment 5 - 21...

  • Page 40: Parts List

    SECTION 6 PARTS LIST 6-1 IC-910 [DISPLAY BOARD] [FRONT UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 8900006700 CABLE OPC-645 (N:6 L:60) 1750000550 S.DIODE 1SS355 TE-17 8900006700 CABLE OPC-645 (N:6 L:60) 1160000080 S.DIODE DAP202K T146 8900006700 CABLE OPC-645 (N:6 L:60) 1160000080 S.DIODE DAP202K T146 8900009240 CABLE OPC-909 (P=1 N=10 L=110) 1160000080 S.DIODE...
  • Page 41 [DISPLAY BOARD] [DISPLAY BOARD] ORDER ORDER DESCRIPTION DESCRIPTION ERJ3GEYJ 221 V (220 Ω) 7030003640 S.RESISTOR ERJ3GEYJ 473 V (47 kΩ) R160 7030003360 S.RESISTOR ERJ3GEYJ 221 V (220 Ω) 7030003590 S.RESISTOR ERJ3GEYJ 183 V (18 kΩ) R161 7030003360 S.RESISTOR ERJ3GEYJ 221 V (220 Ω) 7030003680 S.RESISTOR ERJ3GEYJ 104 V (100 kΩ) R162...

  • Page 42: Vr-A Board

    [DISPLAY BOARD] [DISPLAY BOARD] ORDER ORDER DESCRIPTION DESCRIPTION 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A DS33 5040001870 S.LED SEC 2462C 4030012610 S.CERAMIC C2012 JB 1C 474K-T-A 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A 7030003860 S.JUMPER ERJ3GE JPW V 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A 7030003860 S.JUMPER...

  • Page 43: Jack Board

    [RIT BOARD] [PLL UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 7210003090 VARIABLE RV-316 (RK0972210C05 10KB/10KB) 1130007700 S.IC BU4094BCF-T1 IC12 1110001900 S.IC µPC4570G2-T1 IC101 1130004830 S.IC TC7SU04F (TE85R) 6510022570 S.CONNECTOR 06FMN-BMTTR-A-TBT IC131 1140007880 S.IC TC190G08AF-0046-Z/SC-1246A IC161 1110001900 S.IC µPC4570G2-T1 IC271 1110004460 S.IC µPB1509GV-E1 0910052661 PCB B 5461A IC301...
  • Page 44 [PLL UNIT] [PLL UNIT] ORDER ORDER DESCRIPTION DESCRIPTION ERJ3GEYJ 470 V (47 Ω) L424 6200005720 S.COIL ELJRE 33NG-F R192 7030003280 S.RESISTOR L425 6200005700 S.COIL ELJRE 22NG-F R193 7030003440 S.RESISTOR ERJ3GEYJ 102 V (1 kΩ) L471 6200005010 S.COIL NL 252018T-100J R194 7030003620 S.RESISTOR ERJ3GEYJ 333 V (33 kΩ) ERJ3GEYJ 221 V (220 Ω)
  • Page 45 [PLL UNIT] [PLL UNIT] ORDER ORDER DESCRIPTION DESCRIPTION ERJ3GEYJ 680 V (68 Ω) R427 7030003300 S.RESISTOR R717 7030007200 S.RESISTOR ERA3YEB 202V R474 7030003560 S.RESISTOR ERJ3GEYJ 103 V (10 kΩ) R718 7030007200 S.RESISTOR ERA3YEB 202V ERJ3GEYJ 560 V (56 Ω) R475 7030003290 S.RESISTOR R719 7030007200 S.RESISTOR...
  • Page 46 [PLL UNIT] [PLL UNIT] ORDER ORDER DESCRIPTION DESCRIPTION C192 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A C394 4030006850 S.CERAMIC C1608 JB 1H 471K-T-A C193 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A C398 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A C194 4030006910 S.CERAMIC C1608 CH 1H 0R5C-T-A C399 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A...
  • Page 47 [PLL UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION C705 4030007160 S.CERAMIC C1608 CH 1H 181J-T-A IC101 1110003140 LA1150N C708 4030007110 S.CERAMIC C1608 CH 1H 680J-T-A IC201 1110004840 S.IC NJM1496V-TE1 C709 4030006900 S.CERAMIC C1608 JB 1E 103K-T-A IC351 1110004870 S.IC TA4101F (TE12L) C710 4030006900 S.CERAMIC C1608 JB 1E 103K-T-A...
  • Page 48 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION Q707 1590001660 S.TRANSISTOR XP4312 (TX) D653 1790000620 S.DIODE MA77 (TX) Q751 1590001660 S.TRANSISTOR XP4312 (TX) D701 1790001210 S.DIODE 1SS375-TL Q752 1590001660 S.TRANSISTOR XP4312 (TX) D751 1790000620 S.DIODE MA77 (TX) Q753 1590001660 S.TRANSISTOR XP4312 (TX) D752 1790000620 S.DIODE...
  • Page 49 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION L652 6150004210 COIL LS-480 R157 7030003520 S.RESISTOR ERJ3GEYJ 472 V (4.7 kΩ) L653 6150004170 COIL LS-476 R158 7030003460 S.RESISTOR ERJ3GEYJ 152 V (1.5 kΩ) ERJ3GEYJ 101 V (100 Ω) L703 6150004880 S.COIL LS-513 R159 7030003320 S.RESISTOR...
  • Page 50 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION ERJ3GEYJ 101 V (100 Ω) R364 7030003320 S.RESISTOR R703 7030003520 S.RESISTOR ERJ3GEYJ 472 V (4.7 kΩ) ERJ3GEYJ 101 V (100 Ω) R365 7030003550 S.RESISTOR ERJ3GEYJ 822 V (8.2 kΩ) R704 7030003320 S.RESISTOR ERJ3GEYJ 101 V (100 Ω) R368 7030003320 S.RESISTOR...
  • Page 51 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION R915 7030003520 S.RESISTOR ERJ3GEYJ 472 V (4.7 kΩ) R1521 7030003440 S.RESISTOR ERJ3GEYJ 102 V (1 kΩ) R916 7030003780 S.RESISTOR ERJ3GEYJ 684 V (680 kΩ) R1522 7030003440 S.RESISTOR ERJ3GEYJ 102 V (1 kΩ) R927 7030003810 S.RESISTOR ERJ3GEYJ 125 V (1.2 MΩ)
  • Page 52 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION R1679 7030003680 S.RESISTOR ERJ3GEYJ 104 V (100 kΩ) R1826 7030003510 S.RESISTOR ERJ3GEYJ 392 V (3.9 kΩ) R1680 7030003560 S.RESISTOR ERJ3GEYJ 103 V (10 kΩ) R1829 7030003640 S.RESISTOR ERJ3GEYJ 473 V (47 kΩ) R1681 7030003680 S.RESISTOR ERJ3GEYJ 104 V (100 kΩ) R1830 7030003680 S.RESISTOR...
  • Page 53 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 4030006900 S.CERAMIC C1608 JB 1E 103K-T-A C359 4030006880 S.CERAMIC C1608 JB 1H 472K-T-A 4030006900 S.CERAMIC C1608 JB 1E 103K-T-A C360 4030006900 S.CERAMIC C1608 JB 1E 103K-T-A 4030006900 S.CERAMIC C1608 JB 1E 103K-T-A C361 4030011600 S.CERAMIC C1608 JB 1C 104KT-N...
  • Page 54 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION C732 4030007140 S.CERAMIC C1608 CH 1H 121J-T-A C1008 4510004440 S.ELECTROLYTIC ECEV1HA010SR C751 4030006900 S.CERAMIC C1608 JB 1E 103K-T-A C1009 4030008900 S.CERAMIC C1608 JB 1C 333K-T-A C752 4030006900 S.CERAMIC C1608 JB 1E 103K-T-A C1010 4030011600 S.CERAMIC C1608 JB 1C 104KT-N C753...
  • Page 55 8600036720 E.OTHER SX2355 P1201 J1201 1251MA C1843 4030011600 S.CERAMIC C1608 JB 1C 104KT-N 8970023840 E.OTHER SX2355 ICOM SHIELD (1)/MA C1844 4510004630 S.ELECTROLYTIC ECEV1CA100SR C1845 4510005960 ELECTROLYTIC 10 MV 220 HC C1846 4510004630 S.ELECTROLYTIC ECEV1CA100SR 0910052705 PCB B 5465E C1847 4510004440 S.ELECTROLYTIC ECEV1HA010SR C1848 4030011600 S.CERAMIC...
  • Page 56 [PA UNIT] [PA UNIT] ORDER ORDER DESCRIPTION DESCRIPTION IC40 1110004080 S.IC µPC2709T-E3 D185 1710001060 DIODE XB15A407 IC200 1110003320 S.IC µPC2710T-E3 D190 1750000430 S.DIODE HSB88WSTR IC240 1110003320 S.IC µPC2710T-E3 D201 1790001620 S.DIODE 1SV308 (TPL3) IC501 1110004080 S.IC µPC2709T-E3 D202 1790001620 S.DIODE 1SV308 (TPL3) IC502 1110003320...
  • Page 57 [PA UNIT] [PA UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 6200002630 S.COIL NL 252018T-R10J L518 6200001980 S.COIL NL 252018T-1R0J 6200002840 S.COIL NL 252018T-R22J L519 6200005730 S.COIL ELJRE 39NG-F 6200005680 S.COIL ELJRE 15NG-F L520 6200005730 S.COIL ELJRE 39NG-F L102 6200004960 S.COIL NL 252018T-R33J L521 6150002200 COIL LS-228...
  • Page 58 [PA UNIT] [PA UNIT] ORDER ORDER DESCRIPTION DESCRIPTION ERJ12YJ330U (33 Ω) R108 7030008190 S.RESISTOR R269 7030003440 S.RESISTOR ERJ3GEYJ 102 V (1 kΩ) ERJ3GEYJ 560 V (56 Ω) ERJ3GEYJ 471 V (470 Ω) R110 7030003290 S.RESISTOR R270 7030003400 S.RESISTOR ERJ3GEYJ 471 V (470 Ω) R111 7030003400 S.RESISTOR R271...
  • Page 59 [PA UNIT] [PA UNIT] ORDER ORDER DESCRIPTION DESCRIPTION ERJ3GEYJ 180 V (18 Ω) R585 7030003230 S.RESISTOR 4030006980 S.CERAMIC C1608 CH 1H 070D-T-A ERJ3GEYJ 271 V (270 Ω) R586 7030003370 S.RESISTOR 4030007040 S.CERAMIC C1608 CH 1H 180J-T-A ERJ3GEYJ 681 V (680 Ω) R587 7030003420 S.RESISTOR 4030006980 S.CERAMIC...
  • Page 60 [PA UNIT] [PA UNIT] ORDER ORDER DESCRIPTION DESCRIPTION C139 4030011210 S.CERAMIC GRM42-6 CH 330J 500PT C223 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A C140 4030016580 S.CERAMIC GRH111 CH 390J 500PT C224 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A C141 4030016580 S.CERAMIC GRH111 CH 390J 500PT C225 4030007050 S.CERAMIC C1608 CH 1H 220J-T-A...
  • Page 61 [PA UNIT] [PA UNIT] ORDER ORDER DESCRIPTION DESCRIPTION C307 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A C504 4030007070 S.CERAMIC C1608 CH 1H 330J-T-A C308 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A C505 4030007070 S.CERAMIC C1608 CH 1H 330J-T-A C309 4510007540 ELECTROLYTIC ECA 1CHG 471 C506 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A...
  • Page 62 [PA UNIT] [PA UNIT] ORDER ORDER DESCRIPTION DESCRIPTION C607 4030007070 S.CERAMIC C1608 CH 1H 330J-T-A C716 4030007130 S.CERAMIC C1608 CH 1H 101J-T-A C608 4030009920 S.CERAMIC C1608 CH 1H 050B-T-A C717 4030006850 S.CERAMIC C1608 JB 1H 471K-T-A C609 4030007030 S.CERAMIC C1608 CH 1H 150J-T-A C718 4030006850 S.CERAMIC C1608 JB 1H 471K-T-A...

  • Page 63: Drv Board

    [PA UNIT] [DRV BOARD] ORDER ORDER DESCRIPTION DESCRIPTION F300 5210000130 FUSE FGB 4A Q930 1560001030 S.FET 2SK2975 (MTS103) F301 5220000230 HOLDER S-N5054 #01 F302 5220000230 HOLDER S-N5054 #01 ERJ1WYJ201U (200 Ω) 7030010140 S.RESISTOR MCR10EZHJ 56 Ω (560) 7030000230 S.RESISTOR 7030003860 S.JUMPER ERJ3GE JPW V 7030003860 S.JUMPER ERJ3GE JPW V...
  • Page 64 6-2 UX-910 [MAIN UNIT] — UX-910 [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION IC21 1150002020 IC M57762-02 D165 1750000520 S.DIODE DAN222TL IC31 1110001220 S.IC BA4558F T1 D166 1750000550 S.DIODE 1SS355 TE-17 IC111 1110004080 S.IC µPC2709T-E3 D167 1750000520 S.DIODE DAN222TL IC131 1110005150 S.IC µPC8163TB-E3 D168...
  • Page 65 [MAIN UNIT] — UX-910 [MAIN UNIT] — UX-910 ORDER ORDER DESCRIPTION DESCRIPTION ERJ12YJ331U (330 Ω) L285 6200006050 S.COIL LQP11A 6N8C00 7030008180 S.RESISTOR ERJ1TYJ 3R3 U (3.3 Ω) L286 6200006020 S.COIL LQP11A 3N9C00 7030010260 S.RESISTOR ERJ3GEYJ 471 V (470 Ω) L287 6200006030 S.COIL LQP11A 4N7C00 7030003400 S.RESISTOR...
  • Page 66 [MAIN UNIT] — UX-910 [MAIN UNIT] — UX-910 ORDER ORDER DESCRIPTION DESCRIPTION R288 7310002670 S.TRIMMER RV-143 (RH03A3AS2) 471 R726 7030009891 S.RESISTER ERA3YED 151V ERJ3GEYJ 101 V (100 Ω) ERJ3GEYJ 101 V (100 Ω) R301 7030003320 S.RESISTOR R727 7030003320 S.RESISTOR R311 7030003520 S.RESISTOR ERJ3GEYJ 472 V (4.7 kΩ) R728...
  • Page 67 [MAIN UNIT] — UX-910 [MAIN UNIT] — UX-910 ORDER ORDER DESCRIPTION DESCRIPTION 4030011600 S.CERAMIC C1608 JB 1C 104KT-N C173 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A 4030006850 S.CERAMIC C1608 JB 1H 471K-T-A C174 4510004630 S.ELECTROLYTIC ECEV1CA100SR 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A C175 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A...
  • Page 68 [MAIN UNIT] — UX-910 [MAIN UNIT] — UX-910 ORDER ORDER DESCRIPTION DESCRIPTION C287 4030006880 S.CERAMIC C1608 JB 1H 472K-T-A C550 4030007010 S.CERAMIC C1608 CH 1H 100D-T-A C288 4030009530 S.CERAMIC C1608 CH 1H 030B-T-A C551 4030007090 S.CERAMIC C1608 CH 1H 470J-T-A C289 4030007090 S.CERAMIC C1608 CH 1H 470J-T-A...
  • Page 69 [MAIN UNIT] — UX-910 [MAIN UNIT] — UX-910 ORDER ORDER DESCRIPTION DESCRIPTION C731 4030007050 S.CERAMIC C1608 CH 1H 220J-T-A 0910052786 B 5468F C732 4030007050 S.CERAMIC C1608 CH 1H 220J-T-A EP10 6910000970 BEAD DL-2OP 2.6-3-1.2H C733 4030009520 S.CERAMIC C1608 CH 1H 020B-T-A EP11 6910000970 BEAD...

  • Page 70: Display Unit

    SECTION 7 MECHANICAL PARTS [FRONT UNIT] [COVER PARTS] REF. NO. ORDER NO. DESCRIPTION QTY. REF. NO. ORDER NO. DESCRIPTION QTY. 6910012480 RMS20-250-201-1R 2510000040 Speaker C065K12I0810 6450001230 HLJ0999-01-480 8110007190 2355 L-cover 8210017280 2355 front panel assembly 8110007310 2355 U-cover assembly 8310048750 2355 window plate 8930006390 Speaker holder...
  • Page 71 MP25 (C) MP34 (F) MP25 (C) MP34 (F) MP21 (C) MP25 (C) MP21 (C) MP21 (C) MP21 (C) MP34 (F) MP25 (C) MP34 (F) MP25 (C) MP34 (F) MP802 (D) EP31 (D) MP25 (C) MP2 (C) MP34 (F) MP25 (C) MP34 (F) MP25 (C) MP4 (D)
  • Page 72 MP34 (CH) MP34 (CH) MP56 (CH) MP12 (CH) MP32 (CH) MP57 (CH) MP56 (CH) MP34 (CH) MAIN UNIT MP1851 (M) MP56 (CH) MP56 (CH) MP59 (CH) MP34 (CH) MP34 (CH) MP34 (CH) MP13 (CH) PLL UNIT MP56 (CH) MP11 (PL) MP32 (CH) MP2 (CH) MP32 (CH)
  • Page 73 [PA UNIT] [UX-910 CHASSIS PARTS] REF. NO. ORDER NO. DESCRIPTION QTY. REF. NO. ORDER NO. DESCRIPTION QTY. 8930014140 Earth spring (D) 6510000330 Connector NR-DS MP7* 8510012310 2157 DBM case 8010018161 2356 case-1 MP8* 8510013620 2355 A-filter case 8110007260 2356 cover MP9* 8510002020 MIX shield case...
  • Page 74 SECTION 8 SEMI-CONDUCTOR INFORMATION • TRANSISTORS AND FET’S 2SA1162 GR 2SA1586 GR 2SA1588 GR 2SB1132 T100 R 2SB1133 R (Symbol: SG) (Symbol: SG) (Symbol: ZG) (Symbol: BAR) (Symbol: B1133) 2SB1201 S 2SC2712 BL 2SC2712 GR 2SC2714 O 2SC3102 (Symbol: B1201) (Symbol: BL) (Symbol: LG) (Symbol: QO)
  • Page 75 2SK2855 2SK2973 2SK2975 3SK131 T2 LA 3SK177 T1B U73 (Symbol: UT) (Symbol: K1) (Symbol: V12) (Symbol: U73) 3SK241 R CPH3404-TL DTA114 EE TL DTA114EUA T106 DTA144EUA T106 (Symbol: DU) (Symbol: KD) (Symbol: 14) (Symbol: 16) (Symbol: 16) DTC114EUA T106 DTC114TUA T106 DTC144EUA T106 DTC144TU T107 FMW1 T148...
  • Page 76 • DIODES 1SS301 1SS355 1SS375-TL 1SS385 1SV214 (Symbol: B3) (Symbol: A) (Symbol: FH) (Symbol: 09) (Symbol: T1) pink 1SV217 1SV237 1SV239 1SV265 TL 1SV286 (Symbol: T6) (Symbol: BB) (Symbol: TC) (Symbol: LV) (Symbol: T7) 1SV307 1SV308 DA221 DAN202 U T107 DAN222TL (Symbol: TX) (Symbol: TX)

  • Page 77: Rit Board

    SECTION 9 BOARD LAYOUTS 9-1 VR-A BOARD 9-3 RIT BOARD • TOP VIEW • TOP VIEW to DISPLAY to DISPLAY board J2 board J10 9-2 VR-B BOARD • TOP VIEW to DISPLAY board J11 9 - 1...
  • Page 78 • BOTTOM VIEW (RIT BOARD) • BOTTOM VIEW (VR-A BOARD) • BOTTOM VIEW (VR-B BOARD) 9 - 2...

  • Page 79: Mic Board

    9-4 FUNC BOARD 9-8 VARISTOR-A BOARD • TOP VIEW • TOP VIEW V-A2 V-A1 to DISPLAY unit J3 9-9 VARISTOR-B BOARD • TOP VIEW 9-5 MIC BOARD 9-6 JACK BOARD • TOP VIEW • TOP VIEW V-B2 V-B1 9-7 DRV BOARD •...
  • Page 80 • BOTTOM VIEW (VARISTOR-A BOARD) • BOTTOM VIEW (FUNC BOARD) • BOTTOM VIEW (VARISTOR-B BOARD) • BOTTOM VIEW (JACK BOARD) • BOTTOM VIEW (MIC BOARD) to DISPLAY board J6 • BOTTOM VIEW (DRV BOARD) to DISPLAY board J5 • BOTTOM VIEW (VARISTOR-C BOARD) 9 - 4...

  • Page 81: Display Board

    9-11 DISPLAY BOARD • TOP VIEW 9 - 5...
  • Page 82 • BOTTOM VIEW (DISPLAY BOARD) to FUNC board J1 to PLL unit J1 to MIC board J2 to JACK board J2 to VR-A board J1 PHIN SSPO MSVR MAVR MSPO 1 100 81 80 SSVR to MAIN SAVR SENSOR to VR-B board J1 J10 6 RIVR SFVR...
  • Page 83 9-12 PA UNIT VHF ANT UHF ANT • TOP VIEW to UX-910 P300 W305 UTU1 UPRI UT9V VUMS to MAIN unit J1351 UR9V UATT VUT9 POWS 43PV P551 430M 2Lo from PLL unit J551 P510 V SUB to MAIN unit J651 P251 144M 1Lo from PLL unit J251...
  • Page 84 • BOTTOM VIEW (PA UNIT) 9 - 8...
  • Page 85 9-13 PLL UNIT • TOP VIEW to DISPLAY board J9 to MAIN unit J501 to MAIN unit J1051 J601 J701 P551 430M 2Lo to PA unit J40 P251 P312 P421 144M 1Lo 30.2 430M 1Lo to PA unit J503 to PA unit J240 from UX-910 J312 9 - 9...
  • Page 86 • BOTTOM VIEW (PLL UNIT) MP11 9 - 10...
  • Page 87 to UT-106 to UT-106 9-14 MAIN UNIT J1771 J1781 to DISPLAY board J14 to PLL unit J601 to UT-106 • TOP VIEW J1751 J1201 J501 J1151 CIVE DRES PTT1 MIUD SEND ATXS DASH P501 SBSY VMAIN to DISPLAY from PA unit J501 CENM AGRM board J8...
  • Page 88 • BOTTOM VIEW (MAIN UNIT) 9 - 12...

  • Page 89: Ux-910 Main Unit

    9-15 UX-910 MAIN UNIT • TOP VIEW P312 SCLK to IC-910 PLL unit J541 to IC-910 PA unit Chassis J1 J311 DRES 12TP 1FOR 12PV OPB1 PDAT 12ST 12PS 12DS 12UL 12REF to IC-910 MAIN unit J2 9 - 13...
  • Page 90 • BOTTOM VIEW (UX-910 MAIN UNIT) 9 - 14...

  • Page 91: Pa Unit

    SECTION 10 BLOCK DIAGRAMS 10-1 MAIN UNIT IC1804B Q1855 IC1803-3 NJM2058M Q902 2SC4116 DTC144EU COVER UNIT M62363FP D903 MA728 D1851 1SS355 IC1807A BEEP METER GAIN RFGS NJM2058M C065K12I0810 CTRL DRIVER PHCO IC1803-2 Q852 R857 Q851 Q850 OPTION Q901 D902 FI751 M62363FP 3SK131 RV-110...

  • Page 92: Main Unit

    10-2 PA AND PLL UNITS 144 MHz Q507 D513 D514 D515 Q511 2SK1740 3SK177 1SV217 HSM88AS 1SV237 Q512 2SK1740 LIMIT IC502 D510 MAIN PC2710 Q651 RL700 UNIT 1SV217 D720 D511 2SC5125 AE5349 HSU88 A1LO Q652 1SV217 D710 D721 Q510 VT9V VTU1 D512 VTU2...

  • Page 93: Front Unit

    1FOR NJM2360M D202 SB07-03C IC31: BA4558F 12PR DTC114TU Q36: 2SK2354 2SK2855 CTRL CTRL DTC114TU DRIVE DTA144EU DRIVE POWER SB0812H-ICOM-00 Q71: 2SD1801 Q72: DTC144EU TX/RX DTA144EU IC21: CTRL ALCL Q73: 2SC2712 M57762-02 D502: HSU88 Q74: 2SC2712 2SB1201 D503: HSU88 2SC4116 FAN1...

  • Page 94: Wiring Diagram

    SECTION 11 WIRING DIAGRAM J1561 J1571 J1401 J1851 J1852 J1403 J1581 DISPLAY BOARD [REMOTE] [DATA2] [KEY] [DATA1] [MAIN-SP] [SUB-SP] CHASSIS FANV FANV [ACC] P300 J510 MSVR MSVR J651 P510 MAVR MAVR VSUB VSUB J1101 P501 J501 TEMP TEMP VMAIN VMAIN VR-A BOARD 12PV J652...

  • Page 95: Voltage Diagrams

    SECTION 12 VOLTAGE DIAGRAMS 12-1 FRONT UNIT KST3 KST2 MP801 POWK [TX] -5.01 DAP202K DAP202K DAP202K DS1 - DS24 DAP202K DAP202K DAP202K DAP202K L201 R201 [POWER] TLGE1002 D202 L203 SLF7032T-101MR45-2 KST1 [COMP] 0.001 SB07-03C R202 SLF7032T-101MR45-2 KST0 DAP202K DAP202K DAP202K DS10 DS11 DS12...

  • Page 96: Pll Unit

    12-2 PLL UNIT CP100 PLL UNIT 14LV R172 9.03 8.34 Q153 R133 DTC144TU C148 Q181 0.001 C184 2SD2345 C183 14UL R192 R193 R112 2k 0.001 D181 C182 0.001 1SS355 L131 9.01 C147 R113 2k 7.91 2.13 2.45 R101 1k R134 R163 C145 C144...

  • Page 97: Pa Unit (1)

    12-3 PA UNIT (1) PA UNIT (1) VHF TX:0.672 13.80 other R722 R715 C715 C731 100p C658 L653 Q651 100p LA-263 2SC5125 C678 10p C665 R652 D721 C667 C684 C668 L657 R721 C730 C657 HSU88 C676 10p LA-300 C656 R653 C659 RL700 CHASSIS J1...

  • Page 98: Pa Unit (2)

    12-4 PA UNIT (2) PA UNIT (2) C124 D117 L152 L153 MA4PH224 0.001 EXC-ELDR25C LA-245 C165 C164 L117 C192 R185 :13.57 1812CS.122XKBC C147 C146 C145 144M TX:0 220p L118 C166 440M TX:0.72 144M TX:0.3 R152 144M TX:0 144M TX:0 C191 440M TX:13.57 R117 1812CS.122XKBC...

  • Page 99: Main Unit (1)

    12-5 MAIN UNIT (1) MAIN UNIT (1) CP1566 J1351 J1561 L1561 100 H 43PV 43PV OUTM DOUT R1561 22k L1562 100 H POWS POWS CP1564 VUT9 VUT9 MDTC MDTC DATA1 (TX/RX) L1563 100 H UATT UATT MCKC MCKC 13.51 from PA C1522 0.1 C1521 0.01 UR9V...
  • Page 100 12-6 MAIN UNIT (2) 12-7 MAIN UNIT (3) MAIN UNIT (2) MAIN UNIT (3) R219 470 D207 1SS355 SSBI SSBI SSBI 144MHz SUB-RX:4.61 D651 MA77 other R655 AGCS C661 IC801 0.01 R202 BA09T IC803 RV-150 C662 12.41 4.99 C313 0.001 C656 R661 0.01...

  • Page 101: Ux-910 Main Unit (1)

    12-8 UX-910 MAIN UNIT (1) MAIN UNIT (1) MEASUREMENT CONDITIONS MULTIMETER:50k /V OSCLLOSCOPE:20MHz Display frequency:1295MHz SUPPLY VOLTAGE:13.8V modulation at TX:none L511 10 H C515 470p C522 MP541 C523 8V_1VCO L555 C524 C520 SSB,CW R515 C507 470p 56nH 0.001 EP510 R533 C508 Q531 470p...

  • Page 102: Ux-910 Main Unit (2)

    12-9 UX-910 MAIN UNIT (2) MAIN UNIT (2) CP321 CP322 56nH W243 TX:8.3 TX:9.0 RX:0 RX:0 IC21 M57762-02 P. AMP ON RV-150 RX:13.0V CHASSIS TX:1.5 CP401 D503 RX:0 HSU88 J501 107nH 47nH [12ANT] C321 C322 C323 C326 100p RX_TX 2SK2854 13.8 13.8 LFSN30N18C1280B...
  • Page 103 Icom (UK) Ltd. : http://www.icomcanada.com Unit 9, Sea St., Herne Bay, Kent, CT6 8LD, U.K. Phone : 01227 741741 Fax : 01227 741742 Icom (Australia) Pty. Ltd. : http://www.icomuk.co.uk A.B.N. 88 006 092 575 Icom France S.a 290-294 Albert Street, Brunswick, Victoria, 3056, Australia...
  • Page 104 S-13714HZ-C1 © 2001 Icom Inc. 1-1-32, Kamiminami, Hirano-ku Osaka 547-0003, Japan...

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