Icom iC-m34 Service Manual
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Icom iC-m34 Service Manual

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Enlarged version
VHF MARINE TRANSCEVER
iC-m34
S-14313XZ-C1
Dec. 2006

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Summary of Contents for Icom iC-m34

  • Page 1 VHF MARINE TRANSCEVER iC-m34 S-14313XZ-C1 Dec. 2006...
  • Page 2 8. READ the instructions of test equipment thoroughly before connecting equipment to the transceiver. Icom, Icom Inc. and logo are registered trademarks of Icom Incorporated (Japan) in the United States, the United Kingdom, Germany, France, Spain, Russia and/or other countries.

  • Page 3: Table Of Contents

    CONTENTS SECTION SPECIFICATIONS SECTION INSIDE VIEWS SECTION DISASSEMBLY INSTRUCTIONS SECTION CIRCUIT DESCRIPITON RECEIVER CIRCUITS............4-1 TRANSMITTER CIRCUITS .

  • Page 4: Specifications

    • Antenna impedance • Operating temperature range : –20˚C to +60˚C; –4˚F to +140˚F • Power supply requirement : Specified Icom's battery pack (negative ground) (Operating voltage; 7.5 V DC) • Current drain (At 13.8 V DC ; approx.) : Receiving;...

  • Page 5: Channel List

    • CHANNEL LIST . y l . y l , s l y l l c i l 1 - 2...
  • Page 6 SECTION 2 INSIDE VIEWS • MAIN UNIT (TOP VIEW) POWER SUPPLY CONTROLLER (IC353: RSQ035P03TR) APC CONTROLLER AF POWER AMPLIFIER (IC50: NJM2125F) (IC280:TA7368F) TX POWER AMPLIFIER (Q54:RD07MVS1) • MAIN UNIT (BOTTOM VIEW) 1ST IF FILTERS (FIL150, FIL151: FL-412) IF IC (IC170: TA31136FNG) CERAMIC DISCRIMINATOR (X170: JTBM450CX24) AF LPF/AF AMPLIFIER...
  • Page 7 SECTION 3 DISASSEMBLY INSTRUCTION 1. Removing the Front panel 3. Removing the MAIN UNIT • Unscrew 4 screws A, and remove the rear panel from the q Unsolder 2 points B (Bottom side). w Unsolder 1 point C (The core of the antenna connector). Front panel.

  • Page 8: Receiver Circuits

    SECTION 4 CIRCUIT DESCRIPTION The converted 1st IF signal is passed through two 1st IF 4-1 RECEIVER CIRCUITS filters (FI150, FI151) to filter out unwanted signals, and 4-1-1 ANTENNA SWITCH applied to the 1st IF amplifier (Q151). The amplified 1st IF The received signals from the antenna connector are signal is then applied to the FM IF IC (IC170, pin 16).

  • Page 9: Transmitter Circuits

    If an external speaker-microphone or headset is attached to The level adjusted MIC (MOD) signals are applied to the [SP MIC] connector (J250), the de-emphasized AF signals the limiter amplifier (IC200, pins 13, 14) which limits the are passed through the analog switch (IC430, pins 8, 9) and amplitude of the MIC signals to prevent over deviation.

  • Page 10: Pll Circuits

    The buffer-amplified signals from the LPF (L20, R20, C20 4-3 PLL CIRCUITS −C22) are applied to the PLL IC (IC1, pin 8). The applied 4-3-1 VCO CIRCUIT signals are divided at the prescaler and programmable The VCO (Q21, Q22, D21−D23) generates the both of trans- counter according to the “SDATA (SDATAO)”...

  • Page 11: Cpu Port Allocations

    4-5 CPU PORT ALLOCATION Port Signal Description Name Port Signal Description Input port for [SQL] key. Name “Low”=While the key is pushed BEEP Beep sounds. Inputport for [H/L] key. PLL mode control signal. “Low”=While the key is pushed “Low”=power save mode. PLL unlock detect signal.

  • Page 12: Preparation

    Program group ‘CS-M34 ADJ’ appears in the ‘Programs’ folder of the start menu, and ‘CS-M34 ADJ’ icon appears on the desk top screen. STARTING SOFTWARE ADJUSTMENT (1) Connect IC-M34 and a PC with OPC-478/UC, OPC-1668 and JIG CABLE. (2) Turn the transceiver ON. ®...
  • Page 13 0.1–10 W/50 Ω SINAD meter To SP line JIG cable (RED) Frequency counter Speaker (8 Ω) To [SP MIC] connector IC-M34 • JIG cable To SINAD meter/speaker To audio generator/AC millivoltmeter Ω 33 k WHITE (MIC) OPC-478/U/UC (MIC line) RED (AFOUT)
  • Page 14 • ADJUSTMENT SOFTWARE SCREEN I/O check button NOTE: The above screen is an example only. Each transceiver has its own specific values for each setting. q: Adjustment condition t: Microphone sensitivity w: Reference frequency y: Receive sensitivity e: Transmit output power u: Squelch level r: FM deviation *;...

  • Page 15: Software Adjustment (Frequency)

    5-2 SOFTWARE ADJUSTMENT (FREQUENCY) Select an adjustment item using [↑] / [↓] keys, then set to the specifi ed value using [←] / [→] keys on the connected PC’s keyboard. ADJUSTMENT ADJUSTMENT CONDITION OPERATION VALUE PLL LOCK 1 • Operating CH. : 16 Click the “I/O check button”...

  • Page 16: Software (Transmit And Receive)

    5-3 SOFTWARE ADJUSTMENT (TRANSMIT and RECEIVE) Select an adjustment item using [↑] / [↓] keys, then set to the specifi ed value using [←] / [→] keys on the connected PC’s keyboard. ADJUSTMENT ADJUSTMENT CONDITION OPERATION VALUE TRANSMIT NOTE: DO NOT put the cursor on [RF POWER (E-Low)] then push the [ENTER] key. Otherwise, “TRANSMIT OUTPUT OUTPUT POWER”...

  • Page 17: Parts List

    SECTION 6 PARTS LIST [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION 1130011671 S.IC MB15E03SLPFV1-G-BND-E1 47.8/9.1 6200012470 S.COL 0.30-1.7-7TL 45.3N 105.3/5 1180002690 S.REG S-812C36AMC-C2Q-T2G 42.4/15.8 6200012770 S.COL 0.26-1.1-7TR 24N 107.5/4.3 IC50 1120002830 S.IC NJM2125F-TE1-#FZZB 101.6/23.1 6200012780 S.COL 0.30-1.4-6TL 27.2N 110.2/8.9 IC170 1110003201 S.IC...
  • Page 18 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION R154 7030005090 S.RES ERJ2GEJ 104 X (100 k) 81.6/37.4 R386 7030005050 S.RES ERJ2GEJ 103 X (10 k) 104.4/25.8 R155 7030007290 S.RES ERJ2GEJ 222 X (2.2 k) 81.5/34.8 R387 7030005090 S.RES ERJ2GEJ 104 X (100 k) 63.7/37.4 R156 7030005000 S.RES ERJ2GEJ 471 X (470)
  • Page 19 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION 4030017350 S.CER ECJ0EC1H020B 103.4/20.2 C366 4030016950 S.CER ECJ0EB1A473K 4.4/21.5 4030017650 S.CER ECJ0EC1H270J 100.5/21.4 C367 4030017040 S.CER ECJ0EB1A333K 5.7/26.9 C100 4030017360 S.CER ECJ0EC1H030B 101.4/18.4 C370 4030018070 S.CER ECJ0EC1H300J 4.2/8 C101 4030017400 S.CER ECJ0EC1H220J 98.9/18.5 C371 4030017400 S.CER ECJ0EC1H220J...
  • Page 20 SECTION 7 MECHANICAL PARTS AND DISASSEMBLY [CHASSIS PARTS] [ACCESSORIES] ORDER ORDER DESCRIPTION QTY. DESCRIPTION QTY. 6910014190 2497 ANT CONNECTOR FA-SC58V Optional product Optional product BC-174A [USA] 2510001330 036D0803 Optional product BC-174E [SEA] Optional product BP-252 8900016000 OPC-1129A Optional product BC-173 (Incl. MP4) 6910018620 BLACK HANDY STRAP 8210023610 2987 FRONT PANEL [USA]...
  • Page 21 MP25(C) MP24(C) MP25(C) MP14(C) MP24(C) MP22(C) MP48(C) J31(C) MP33(C) MP34(C) MP32(C) MP35(C) MP31(C) MP21(C) MP33(C) MP16(C) W1(C) MP15(C) MP23(C) MP39(C) MC250(M) MP17(C) MP43(C) MP50(C) MP18(C) MP39(C) MP1(C) MP42(C) MP4(C) MP360(M) MAIN UNIT EP360(M) EP4(A) DS246(M) MP19(C) MP2(C) MP361(M) (C): CHASSIS PARTS (M): MAIN UNIT PARTS (A): ACCESSORIES MP9(C)

  • Page 22: Section 8 Semiconductor Information

    SECTION 8 SEMICONDUCTOR INFORMATION • TRANSISTERS • DIODES •3SK294 • KRA302E • KRA304E • KRC404E • KRC414E • 1SV307 • 1SV308 • HVC350BTRF • HVC376BTRF • KDS122 (Marking: UV) (Marking: PB) (Marking: PD) (Marking: ND) (Marking: NP) (Marking: TX) (Marking: TX) (Marking: B0) (Marking: XX) (Marking: C3)

  • Page 23: Section 9 Board Layouts

    SECTION 9 BOARD LAYOUTS J251 SPO 2 SP1 (CHASSIS) • MAIN UNIT (TOP VIEW) GND 1 CLONE AFOUT J250 (MAIN UNIT) BTYPE • BC-173 (TOP VIEW) 9 - 1...
  • Page 24 • MAIN UNIT (BOTTOM VIEW) [PTT] • BC-173 (BOTTOM VIEW) S-14313XH-P2 Printed in Japan © 2006 Icom Inc. 9 - 2...

  • Page 25: Block Diagram

    SECTION 10 BLOCK DIAGRAM CHASSIS ANTENNA IC1:MB15E03SLPFV1 Q 21,Q22:KTC3770U Q23: Q24: D 50,D51: Q50: Q53: Q54: D 52,D90: MA7 7 D22,D23:HVC350B 2SC4215 2SC4215 KTC3770U RD01MUS1 RD07MVS1 1SV307 LOOP TX/RX BUFF BUFF BUFF DRIVE IC2: BTYPE S-812C36AMC BTYPE CR-766 D80: RB706F TDETV Q20:KRC404E 21.25MHz...
  • Page 26 SECTION 11 VOLTAGE DIAGRAM 11-1 MAIN UNIT (Left side) IC190 VIN1 VIN8 FCON VOUT1 VOUT8 PCON VOUT2 VOUT7 VIN2 VIN7 DAST DAST RESET VDAREF SDATA SQLI S11000 R192 VIN3 VIN6 MCON SQLO DS246 VOUT3 VOUT6 VOLOUT VOUT4 VOUT5 IC200 VIN4 VIN5 LM2902PW R EXPTT...

  • Page 27: Main Unit (Right Side)

    TX:3.07V TX:2.78V 11-2 MAIN UNIT (Right side) RX:3.05V RX:2.85V S-812C36AMC TX:0.72V TX:4.54V RX:1.31V RX:0.00V VOUT KDS160E Q360 C 127 Q351 UNLK KRA304E KRC404E L2 1 L2 2 3.60V C3 2 C4 0 L2 0 C6342A 1.5P 2.7U C3 7 R4 5 0.3P C3 9 SC K...
  • Page 28 • ELECTRICAL PARTS SECTION 12 BC-173 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION 1190002270 S.IC NJW4100V-TE1 37.8/27.2 4030019190 S.CER 12.4/3.1 • MECHANICAL PARTS • EXPLODED VIEW 4510005240 ELE 16 ME 22 SWB [CHASSIS PARTS] 4030019190 S.CER 28.7/13.1 1540000550 S.TR 2SD1664 T100Q 25/4.8...
  • Page 30 S-14313XZ-C1 1-1-32, Kamiminami, Hirano-ku, Osaka 547-0003, Japan © 2006 Icom Inc.

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