Icom IC-M35 Service Manual
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Icom IC-M35 Service Manual

Vhf marine transceiver
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VHF MARINE TRANSCEIVER
S-14520XZ-C1
Oct. 2008

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Summary of Contents for Icom IC-M35

  • Page 1 VHF MARINE TRANSCEIVER S-14520XZ-C1 Oct. 2008...
  • Page 2 8. READ the instructions of test equipment throughly before connecting a test equipment to the transceiver. Icom, Icom Inc. and ICOM 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

    TABLE OF CONTENTS SECTION SPECIFICATIONS SECTION INSIDE VIEWS SECTION DISASSEMBLY INSTRUCTION SECTION CIRCUIT DESCRIPITON RECEIVER CIRCUITS............4-1 TRANSMITTER CIRCUITS .

  • Page 4: Specifications

    SECTION 1. SPECIFICATIONS 1-1 IC-M35 1-2 IC-M36 ï GENERAL ï GENERAL • Frequency coverage : Transmit 156.000–161.450 MHz • Frequency coverage : Transmit 156.025–157.425 MHz Receive 156.000–163.425 MHz Receive 156.050–163.275 MHz • Mode : FM (16K0G3E) • Mode : FM (16K0G3E) •...
  • Page 5 1-3 MARINE CHANNEL LIST • For IC-M35 • International channels Frequency (MHz) Frequency (MHz) Frequency (MHz) Frequency (MHz) Frequency (MHz) Frequency (MHz) Transmit Receive Transmit Receive Transmit Receive Transmit Receive Transmit Receive Transmit Receive 157.050 161.650 156.125 160.725 157.125 161.725 156.050...
  • Page 6 SECTION 2. INSIDE VIEWS • MAIN UNIT (TOP VIEW) CPU (under the LCD) (IC360) INTERNAL MICROPHONE (MC250) 1ST IF AMP (Q151) • MAIN UNIT EEPROM (IC340) (BOTTOM VIEW) “VCC” LINE SWITCH (Q353) CPU RESET IC “CPU5V” LINE REGULATOR (IC341) (IC220) INVERTER (data interface) (IC364) CPU CLOCK...

  • Page 7: Disassembly Instruction

    SECTION 3. DISASSEMBLY INSTRUCTION 1. REMOVING FRONT PANEL 3. REMOVING MAIN UNIT • Unscrew 4 screws from the rear panel, and remove 1) Unsolder 2 points from the top side, and 1 point from the the rear panel from the front panel. bottom side.

  • Page 8: Circuit Descripiton

    SECTION 4. CIRCUIT DESCRIPTION 4-1 RECEIVER CIRCUITS RF CIRCUITS The quadrature detector is a frequency demodulator which uses a discriminator (X170) as a phase delayer, and RF circuits consist of RF fi lters, antenna switch (ANT SW), provides demodulation without any adjustment. RF amplifi...

  • Page 9: Transmitter Circuits

    4-2 TRANSMITTER CIRCUITS TX AF CIRCUITS TX AMPLIFIERS AF signals from the microphone (MIC signals) are passed The frequency-modulated signal from the VCO (TX signal) through the MIC line SW (IC260A) and amplified by MIC is passed through the LO SW (D50), and amplified by the AMP (IC200B), then passed through the MIC mute SW buffer AMP (Q50), driver AMP (Q53) and power AMP (Q54) (IC260C).

  • Page 10: Frequency Synthesizer Circuits

    4-3 FREQUENCY SYNTHESIZER CIRCUITS IC1 is a PLL IC which contains prescaler, programmable While transmitting, the VCO (Q21, 22, D20–23) oscillating counter, phase comparator and charge pump in its package. frequency is determined by the value of D22, D23, L22, C26 and C27, and the frequency modulation is carried out by The 21.25 MHz reference frequency signal is fed from X1.

  • Page 11: Port Allocations

    4-5 PORT ALLOCATIONS • CPU (IC360) LINE LINE DESCRIPTION DESCRIPTION NAME NAME Internal PTT SW input. BEEP Beep sound (Squarewave) output. PTTIN H=Int. [PTT] pushed. PLL power save mode control. BTYPE Battery distinction input. TDEC Decoded tone signal output. (for monitor) Aquaquake drain water function contorl DASTB Strobe signal to D/A converter.

  • Page 12: Adjustment Procedures

    SECTION 5. ADJUSTMENT PROCEDURE 5-1 PREPARATION ¤ REQUIRED EQUIPMENTS EQUIPMENT GRADE AND RANGE EQUIPMENT GRADE AND RANGE • OPC-478 or OPC-478UC Adjustment software CS-M36/35 (Revision 1.0 or later) JIG cable • Modifi ed OPC-1668 (See the illust below) Audio generator Frequency range : 300–3000 Hz Measuring range...
  • Page 13 ” will appear. Click [Next>]. t The “Choose Destination Location” will appear. Then click [Next>] to install the software to the destination folder. (e.g. C:\Program Files\Icom\CS-M36) y After the installation is completed, the “InstallShield Wizard Complete” will appear. Then click [Finish].

  • Page 14: Frequency Adjustments

    5-2 FREQUENCY ADJUSTMENTS Select an adjustment item using [↑] / [↓] keys, then set to the specifi ed value using [←] / [→] keys on the connected PC’s keyboard. ADJUSTMENT TRANSCEIVER’S ADJUSTMENT OPERATION VALUE ITEM CONDITION PLL LOCK • CH. : 16 1) Connect an RF power meter (or a 1.9–2.9 V...

  • Page 15: Receive Adjustments

    5-3 RECEIVE ADJUSTMENTS Select an adjustment item using [↑] / [↓] keys, then set to the specifi ed value using [←] / [→] keys on the connected PC’s keyboard. ADJUSTMENT TRANSCEIVER’S ADJUSTMENT OPERATION VALUE ITEM CONDITION RX SENSITIVITY 1 [BPF T1] •...

  • Page 16: Transmit Adjustments

    5-4 TRANSMIT ADJUSTMENTS Select an adjustment item using [↑] / [↓] keys, then set to the specifi ed value using [←] / [→] keys on the connected PC’s keyboard. ADJUSTMENT TRANSCEIVER’S ADJUSTMENT OPERATION VALUE ITEM CONDITION TX POWER • CH. : 16 1) Connect an RF power meter to the 5.6 W...
  • Page 17 5-4 TRANSMIT ADJUSTMENTS (continued) Select an adjustment item using [↑] / [↓] keys, then set to the specifi ed value using [←] / [→] keys on the connected PC’s keyboard. ADJUSTMENT TRANSCEIVER’S ADJUSTMENT OPERATION VALUE ITEM CONDITION DEVIATION • CH. : 16 1) Connect a Modulation analyzer to •...

  • Page 18: Parts List

    SECTION 6. PARTS LIST [MAIN UNIT] [MAIN UNIT] PARTS PARTS DESCRIPTION DESCRIPTION LOCATION LOCATION 1130011671 S.IC MB15E03SLPFV1-G-ER-6E1 36.2/11.8 FI150 2030000350 MON 21R15AB (FL-368) 1180002690 S.REG S-812C36AMC-C2Q-T2G 32.9/17.4 FI151 2030000481 MON 21R15AB (FL-399A) IC50 1120002830 S.IC NJM2125F-TE1-#FZZB 94.9/15.9 FI170 2020002410 CER LTM450FW <JJE>...
  • Page 19 [MAIN UNIT] [MAIN UNIT] PARTS PARTS DESCRIPTION DESCRIPTION LOCATION LOCATION 7030005590 S.RES ERJ2GEJ 680 X (68) [CHN] 88.8/15.4 R300 7030005290 S.RES ERJ2GEJ 682 X (6.8K) 7.5/28.2 7030005590 S.RES ERJ2GEJ 680 X (68) [EUR-1] R340 7030005090 S.RES ERJ2GEJ 104 X (100K) 99/30.4 7030005590 S.RES ERJ2GEJ 680 X (68) [EUR]...
  • Page 20 [MAIN UNIT] [MAIN UNIT] PARTS PARTS DESCRIPTION DESCRIPTION LOCATION LOCATION 4030018010 S.CER ECJ0EC1H360J 45.8/10.4 C116 4030017570 S.CER ECJ0EC1H040B 63.9/24 4030017460 S.CER ECJ0EB1E102K 45.7/13.8 C117 4030017370 S.CER ECJ0EC1H3R5B [USA] 77.6/22.5 4030017460 S.CER ECJ0EB1E102K 51.6/12.1 4030017370 S.CER ECJ0EC1H3R5B [SEA] 4030017460 S.CER ECJ0EB1E102K 45.7/14.7 4030017350 S.CER ECJ0EC1H020B [CHN]...
  • Page 21 [MAIN UNIT] PARTS DESCRIPTION LOCATION C340 4030016790 S.CER ECJ0EB1C103K 97.4/30.6 C341 4030008890 S.CER C1608 JB 1H 273K-T 94.9/34.3 C350 4030016790 S.CER ECJ0EB1C103K 104.3/24.8 C351 4030016790 S.CER ECJ0EB1C103K 88.1/27 C360 4030016790 S.CER ECJ0EB1C103K 97.7/19.1 C361 4030016950 S.CER ECJ0EB1A473K 90.4/41.1 C363 4030016950 S.CER ECJ0EB1A473K 94/41.3 C364 4030016950 S.CER ECJ0EB1A473K...
  • Page 22 (Incl. SP1, MP2, 3, 5–7, 19, 51, 54) 8310073150 3168 WINDOW PLATE [IC-M36] 8810001460 SCREW BT A0 3.5X20 SUS 8310073200 3168 WINDOW PLATE (A) [IC-M35] 8930011900 SPEAKER NET (A) (FX-573) 8930068980 2905 VENT SHEET 8930078000 3168 KEYBOARD [IC-M36] 8930078220 3168 KEYBOARD (A)
  • Page 23 MP24(C ) ×2 MP21(C ) MP4(C ) MP22(C ) MP25(C )×2 MP48(C ) MP23(C ) ×2 MP55(C ) MC1(C ) MP33 (C ) ×2 MP35(C ) MP56(C )×2 MP9(C) MP31(C) MP57(C) MP37(C) MP8(C) MP32(C) MP34(C) MP16 (C ) MP14(C) MP39 (C ) ×4 MP53 (C) MP59(C )×2 MP360(M )

  • Page 24: Board Layouts

    DS245 C157 R155 R154 R401 R386 R382 R381 Q351 C381 C156 R153 R384 R173 C380 C133 The above key top print illustration is for IC-M36 and is for your reference only. IC-M35 has different key top print. 8 - 1...
  • Page 25 • MAIN UNIT (BOTTOM VIEW) NCLMIC MC1 (CHASSIS) MC250 [PTT] W2 (CHASSIS) C421 C253 C382 C428 R252 R270 R387 C391 C384 R264 R438 S250 C289 R437 C250 R227 R228 R446 R250 C426 J250 C430 C280 R442 R428 R226 C283 IC260 ETXDO IC363 NDET...
  • Page 26 SECTION 9. BLOCK DIAGRAM ANTENNA IC1:MB15E03SLPFV1 Q 21,Q22:KTC3770U Q23: Q24: D 50,D51: Q50: Q53: Q54: D52:1SV307 D22,D23:HVC350B 2SC4215 2SC4215 KDS114 KTC3770U RD01MUS1 RD09MUP2 D90:KDS114 LOOP TX/RX BUFF BUFF BUFF DRIVE AM P IC2: BTYPE S-812C36AMC Q20:KRC404E BTYPE CR-766 D 20:MA2S077 Q3:3SK1069 D 21:MA2S077 LOINV...
  • Page 27 SECTION 10. VOLTAGE DIAGRAM R251 CPU5V EXPTT DETDET ON :4.81V OFF:0.00V MOD MOD Q251 EXPTT IC190 VIN1 VIN8 KRA302E VOUT1 VOUT8 VOUT2 VOUT7 VIN2 VIN7 PTTIN KRC404E DAST RESET ON :4.82V VDAREF OFF:0.00V Q250 Q362 S11000 R192 IC200 IC363 VIN3 VIN6 PTTIN MCON...
  • Page 28 TX:2.47V TX:2.37V RX:2.47V RX:2.45V TX:0.71V TX:4.71V S-812C36AMC RX:1.30V RX:0.00V VOUT KDS160E Q360 C127 Q351 UNLK KRA304E KRC404E 3.59V 2.7U 1.5P 0.3P KTC3770U 2SC4215 KRC404E TX:1.45V RD09MUP2 100P RX:0.00V 2SC4215 SDATA 6.8N 0.001 45.3N 0.001 0.001 27.2N 1SV307 M B15E03SLPFV1 KDS114 R100 FI N PLSTB...
  • Page 29 Phone : +81 (06) 6793 5302 F ax : +81 (06) 6793 0013 : http://ww w .icom.c o .jp/ w o r ld/ind e x.html <Co r po r ate Headqua r ters> Com m unication Equipment 2380 116th A v e n ue N.E., Bell e vu e , W A 98004, U . S .A.
  • Page 30 S-14520XZ-C1 1-1-32, Kamiminami, Hirano-ku, Osaka 547-0003, Japan © 2008 Icom Inc.

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