Icom IC-M601 Service Manual
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Icom IC-M601 Service Manual

Vhf marine transceiver
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SERVICE
MANUAL
VHF MARINE TRANSCEIVER
iM601

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Summary of Contents for Icom IC-M601

  • Page 1 SERVICE MANUAL VHF MARINE TRANSCEIVER iM601...
  • 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-M601 VHF MARINE TRANSCEIVER at the time of power supply that uses more than 15.8 V. This will ruin the transceiver.

  • Page 3: Table Of Contents

    IC-M601 ........

  • Page 4: Specifications

    SECTION 1 SPECIFICATIONS ‘ ‘ GENERAL • Frequency coverage : 156.000–161.450 MHz (Tx) 156.000–163.425 MHz (Rx) • Mode : 16K0G3E (FM) / 16K0G2B (DSC)* • Usable channels : All international and U.S.A channels [UK] : All international channel only [EUR] : All international and ATIS channels [HOL] : All international, DSC and ATIS channels...

  • Page 5: Vhf Marine Channel List

    ‘ ‘ VHF MARINE CHANNEL LIST Channel No. Frequency (MHz) Channel No. Frequency (MHz) Channel No. Frequency (MHz) Transmit Receive Transmit Receive Transmit Receive 156.050 160.650 157.100 161.700 156.675 156.675 156.050 156.050 157.100 157.100 156.725 156.725 156.100 160.700 157.150 161.750 156.775 156.775 156.150...

  • Page 6: Inside Views

    SECTION 2 INSIDE VIEWS 2-1 IC-M601 • MAIN UNIT RF amplifier (Q1: 3SK294) RF amplifier (for CH70) (Q7: 3SK294) Antenna switch circuit 1st mixer circuit (for CH70) 1st mixer circuit D21: HSB88WS D11: HSB88WS L48, L49: 617DB-1327=P3 L18, L19: 617DB-1327=P3...

  • Page 7: Hm-134 (Optional Unit)

    2-2 HM-134 (OPTIONAL UNIT) • TOP VIEW (DS1: A0119) • BOTTOM VIEW System clock (X1: CSTCC4.91MG) (IC1: µPD789405AGK-A30-9EU) Dimmer circuit Data buffer circuit Reset IC Volume IC (IC7: S-80928ANMP) (IC3: M62429FP) 5V regulator AF amplifier (IC5: TA78L05F) (IC2: TA8201AK) AF/MIC switch (IC9: TC4W53FU) MIC amplifier (IC4: NJM2125F)
  • Page 8 SECTION 3 DISASSEMBLY AND OPTIONS INSTRUCTIONS CAUTION: DISCONNECT the DC power cable from the transceiver before performing any work on the transceiver. Otherwise, there is danger of electric shock and/or equip- ment damage. • Opening the transceiver case • Removing the MAIN unit 1 Unscrew 6 screws A, and remove the front unit.
  • Page 9 • Removing the AF unit 1 Disconnect 4 connectors from J5, J8, J9 and J10. 2 Disconnect 2 flat cables from J2 and J4 3 Unscrew 2 screws H, and remove 2 clips I, J. 4 Unscrew 3 screws K, and remove the AF unit. •...

  • Page 10: Circuit Description

    SECTION 4 CIRCUIT DESCRIPTION 4-1 RECEIVER CIRCUITS 4-1-3 1ST MIXER AND 1ST IF CIRCUITS (MAIN UNIT) 4-1-1 ANTENNA SWITCHING CIRCUIT (MAIN UNIT) The 1st mixer circuit converts the received signal into a fixed The antenna switching circuit functions as a low-pass filter frequency of the 1st IF signal with a 1st LO (VCO output) fre- while receiving and as resonator circuit while transmitting.
  • Page 11 4-1-4 2ND IF AND DEMODULATOR CIRCUITS The FM detector circuit employs a quadrature detection method (linear phase detection), which uses a ceramic dis- (MAIN UNIT) criminator (X2) for phase delay to obtain a non-adjusting cir- The 2nd mixer circuit converts the 1st IF signal into a 2nd IF cuit.

  • Page 12: Transmitter Circuits

    4-1-5 AF AMPLIFIER CIRCUIT (AF UNIT) The amplified signals are applied to the IDC amplifier (IC8a, pin 2) via the analog switch (IC7, pins 2, 3, 9), and are then The AF amplifier circuit amplifies the demodulated signals to passed through the splatter filter (IC8b) to suppress unwant- drive a speaker.

  • Page 13: Pll Circuits

    4-2-5 APC CIRCUIT (MAIN UNIT) 4-3-2 TX AND CHANNEL 70 (RX) LOOPS The APC (Automatic Power Controller) circuit stabilizes the The generated signal at the TX-VCO/CHANNEL 70-VCO TX output power. (Q18, D39, D40) enters the PLL IC (IC2, pin 2) and is divid- ed at the programmable divider section and is then applied The RF output signal from the power amplifier (IC13) is to the phase detector section.

  • Page 14: Dsc Circuits

    4-3-4 VCO CIRCUIT (MAIN UNIT) The signalis passed through the splatter filter (AF unit; IC8b) to suppress unwanted 3 kHz or higher signals. The filtered • TX-VCO/CHANNEL 70-VCO (RX) CIRCUITS signals are then applied to the TX modulation circuit via the The VCO outputs from TX-VCO/CHANNEL 70-VCO (Q18) D/A converter IC (MAIN unit;...

  • Page 15: Power Supply Circuits

    High : Bypassing the scrambler unit. Outputs sound signals to the HM-134. AFSUB High : Sounding from HM-134. Outputs voice signals from IC-M601 to INCMH HM-134 using intercom function. High : While receiving. Outputs voice signals from HM-134 to INCHM IC-M601 using intercom function.
  • Page 16 4-7-3 CPU (LOGIC BOARD; IC1) Port Port Description Description number name number name Input port for PLL unlock signal from Input port for the indide temperature TEMP UNLK the PLL IC (MAIN unit; IC12, pin 7). detecting signal. High : While PLL is unlocked. DIAL1–...

  • Page 17: Adjustment Procedures

    (–127 dBm to –17 dBm) I CONNECTION CAUTION! DO NOT transmit while an SSG is connected to the antenna connector. IC-M601 rear panel to the antenna connector Standard signal generator 0.1 300 MHz 127 dBm to 17 dBm (0.1 V to 32 mV)

  • Page 18: Pll Adjustments

    5-2 PLL ADJUSTMENTS ADJUSTMENT MEASUREMENT POINT ADJUSTMENT ADJUSTMENT CONDITION VALUE UNIT LOCATION UNIT ADJUST LOCK • Operating channel : ch P2 MAIN Connect a digital 3.8 V – 4.0 V MAIN VOLTAGE • Receiving multi-meter or oscil- loscope to check point CP1.

  • Page 19: Receiver Adjustments

    5-3 RECEIVER ADJUSTMENTS ADJUSTMENT MEASUREMENT POINT ADJUSTMENT ADJUSTMENT CONDITION VALUE UNIT LOCATION UNIT ADJUST SENSITIVITY • Operating channel : ch 16 MAIN Connect a tracking Set the flat wave MAIN (Except • Connect a tracking generator’s generator’s input to form as shown below. output to the antenna connector the MAIN unit;...
  • Page 20 • MAIN UNIT TOP VIEW RX sensitivity adjustment for channel 70 RX sensitivity adjustment for other channels RX sensitivity check point 5 - 4...

  • Page 21: Parts List

    SECTION 6 PARTS LIST 6-1 IC-M601 [LOGIC BOARD] [SQL BOARD] ORDER ORDER DESCRIPTION DESCRIPTION 7210002360 VARIABLE TP96N97-15F-10KB-1301 1140010584 S.IC HD64F2633F25 (FX2577A-4) 1110005770 S.IC S-80942CNMC-G9C-T2 1130007450 S.IC RTC-4553A 0910055532 PCB B 5885B 1140009240 S.IC HN58X24128FPI 1180002420 S.IC S-818A33AUC-BGN-T2 1510000580 S.TRANSISTOR 2SA1362-GR (TE85R) 1590000430 S.TRANSISTOR DTC144EUA T106...
  • Page 22 [LOGIC BOARD] [LOGIC BOARD] ORDER ORDER DESCRIPTION DESCRIPTION 7030003440 S.RESISTOR ERJ3GEYJ 102 V (1 kΩ) 4550006460 S.TANTALUM ECST1VX225R 7030003560 S.RESISTOR ERJ3GEYJ 103 V (10 kΩ) 4550006460 S.TANTALUM ECST1VX225R 7030003500 S.RESISTOR ERJ3GEYJ 332 V (3.3 kΩ) 4550006460 S.TANTALUM ECST1VX225R ERJ3GEYJ 221 V (220 Ω) 7030003360 S.RESISTOR 4550006460 S.TANTALUM ECST1VX225R...
  • Page 23 [LOGIC BOARD] [AF UNIT] ORDER ORDER DESCRIPTION DESCRIPTION DS20 5040002660 S.LED FY1101F-TR (LED) 7030003560 S.RESISTOR ERJ3GEYJ 103 V (10 kΩ) DS21 5040002660 S.LED FY1101F-TR (LED) 7030003560 S.RESISTOR ERJ3GEYJ 103 V (10 kΩ) DS22 5040002660 S.LED FY1101F-TR (LED) 7030003560 S.RESISTOR ERJ3GEYJ 103 V (10 kΩ) DS23 5040002660 S.LED FY1101F-TR (LED)
  • Page 24 [AF UNIT] [AF UNIT] ORDER ORDER DESCRIPTION DESCRIPTION R209 7030003610 S.RESISTOR ERJ3GEYJ 273 V (27 kΩ) 4030006860 S.CERAMIC C1608 JB 1H 102K-T R210 7030003560 S.RESISTOR ERJ3GEYJ 103 V (10 kΩ) 4030011600 S.CERAMIC C1608 JB 1E 104K-T R211 7030003440 S.RESISTOR ERJ3GEYJ 102 V (1 kΩ) 4510004590 ELECTROLYTIC 16 MV 470 HC ERJ3GEYJ 680 V (68 Ω) R212...
  • Page 25 [AF UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION C261 4030012600 S.CERAMIC C2012 JB 1A 105M-T 1530002600 S.TRANSISTOR 2SC4215-O (TE85R) C262 4030012600 S.CERAMIC C2012 JB 1A 105M-T 1530002600 S.TRANSISTOR 2SC4215-O (TE85R) C263 4030006860 S.CERAMIC C1608 JB 1H 102K-T 1530002850 S.TRANSISTOR 2SC4116-BL (TE85R) C265 4030006860 S.CERAMIC C1608 JB 1H 102K-T...
  • Page 26 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 6200010510 S.COIL ACL2520L-3R3K-T 7030003680 S.RESISTOR ERJ3GEYJ 104 V (100 kΩ) 6200003100 S.COIL NL 322522T-3R9J-3 [HOL], [FRG] only 6130002370 S.COIL LB-258 7030003630 S.RESISTOR ERJ3GEYJ 393 V (39 kΩ) 6200002990 S.COIL NL 322522T-2R2J-3 [HOL], [FRG] only 6200009560 S.COIL MLG1608B R10J-T 7030003580 S.RESISTOR...
  • Page 27 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION R239 7030003680 S.RESISTOR ERJ3GEYJ 104 V (100 kΩ) 4030011190 S.CERAMIC GRM31M2C2H270JV01L ERJ3GEYJ 101 V (100 Ω) R241 7030003320 S.RESISTOR 4030018350 S.CERAMIC GRM31A5C2J151JW01D ERJ3GEYJ 101 V (100 Ω) R242 7030003320 S.RESISTOR 4030006860 S.CERAMIC C1608 JB 1H 102K-T R243 7030003500 S.RESISTOR...
  • Page 28 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION C111 4030008920 S.CERAMIC C1608 JB 1H 473K-T C247 4030011600 S.CERAMIC C1608 JB 1E 104K-T [HOL], [FRG] only C248 4550000510 S.TANTALUM TESVA 1V 473M1-8L C112 4030011810 S.CERAMIC C1608 JB 1A 224K-T C249 4550006560 S.TANTALUM ECST1CY225R [HOL], [FRG] only C251...
  • Page 29 6-2 HM-137 [MAIN UNIT] ORDER [MAIN UNIT] DESCRIPTION ORDER DESCRIPTION C370 4030006860 S.CERAMIC C1608 JB 1H 102K-T C371 4030006860 S.CERAMIC C1608 JB 1H 102K-T 7010006890 RESISTOR R20J 12 kΩ C372 4550006130 S.TANTALUM ECST1VY224R 7010006880 RESISTOR R20J 6.8 kΩ C373 4030011600 S.CERAMIC C1608 JB 1E 104K-T 7010006900 RESISTOR R20J 15 kΩ...
  • Page 30 6-3 HM-134 (OPTIONAL MICROPHONE) [MAIN UNIT] [CHASSIS UNIT] ORDER DESCRIPTION ORDER DESCRIPTION 7030004120 S.RESISTOR ERJ3GEYJ 203 V (20 kΩ) 7030003440 S.RESISTOR ERJ3GEYJ 102 V (1 kΩ) 7070000860 RESISTOR ERG2SJ 150 7030003440 S.RESISTOR ERJ3GEYJ 102 V (1 kΩ) 7030003520 S.RESISTOR ERJ3GEYJ 472 V (4.7 kΩ) 7030003560 S.RESISTOR ERJ3GEYJ 103 V (10 kΩ) 2510001091 SPEAKER...
  • Page 31 [MAIN UNIT] ORDER DESCRIPTION 4550005980 S.TANTALUM TEMSVA 1A 475M-8L 4510005370 S.ELECTROLYTIC ECEV1AA221P 4510004540 S.ELECTROLYTIC ECEV0JA470SR 4030008980 S.CERAMIC C2012 JB 1C 154K-T-A 4030008980 S.CERAMIC C2012 JB 1C 154K-T-A 4030006900 S.CERAMIC C1608 JB 1H 103K-T-A 6310000040 S.RELAY FTR-B3GA4.5Z-SP-B10 6510019420 S.CONNECTOR B8B-ZR-SM3-TF × 5030001900 LCD A0119 (LCD 36 28.5)

  • Page 32: Front Unit

    SECTION 7 MECHANICAL PARTS AND DISASSEMBLY 7-1 IC-M601 [CHASSIS PARTS] [FRONT UNIT] REF. ORDER REF. ORDER DESCRIPTION QTY. DESCRIPTION QTY. 6510004880 Antenna connector MR-DS-E 01 8900011470 Cable OPC-1177 8900011450 Cable OPC-1175 2510001210 Speaker 066P0804 8900011460 Cable OPC-1176 8210019300 2577 front panel (B)
  • Page 33 MP13 (C) MP14 (C) MP19 (C) Unit abbreviations (C): CHASSIS PARTS MP8 (C) (M): MAIN UNIT MP2 (C) MP7 (C) (F): FRONT UNIT (L): LOGIC BOARD (CO): CONNECT-A UNIT (D): DIAL BOARD (S): SQL BOARD (V): VR BOARD MP4 (M) MP11 (C) MP5 (M) MP7 (M)

  • Page 34: Hm-134 (Optional Unit)

    2352 mic plate MP7 (C) MP13 8210018900 2540 rear panel MP12 8820001150 2352 screw MP14 8930057500 2540 R-plate MP13 8850001850 ICOM washer (Y) MP11 (C) MP15 8610010980 2417 hanger knob MP14 8930052340 O ring (AE) MP16 8930053740 O ring (AJ) MP15 8930052350...

  • Page 35: Semi-Conductor Information

    SECTION 8 SEMI-CONDUCTOR INFORMATION • TRANSSISTORS AND FET’S • DIODES 2SA1362 GR 2SA1576A T106 R 2SA1577 T106 Q 2SB1132 T100 R 2SB1143 S 1SS355 1SV214 1SV288 1SV307 1SV308 (Symbol: AEG) (Symbol: FR) (Symbol: HQ) (Symbol: BAR) (Symbol: B1143) (Symbol: A) (Symbol: T1) (Symbol: TJ) (Symbol: TX)

  • Page 36: Board Layouts

    SECTION 9 BOARD LAYOUTS 9-1 VR BOARD 9-4 CONNECT-A UNIT • TOP VIEW VOL1 VOL2 to AF unit J6 9-2 SQL BOARD to AF unit W6 to AF unit J4 SQLG SQLV • BOTTOM VIEW (CONNECT-A UNIT) SQL5V to LOGIC board J7 COMMAND COMMAND...

  • Page 37: Logic Board

    9-5 LOGIC BOARD • TOP VIEW MENU CH/WX DISTRESS POWER 9 - 2...
  • Page 38 • BOTTOM VIEW (LOGIC BOARD) to MAIN unit J1 to FLASH to LCD to DIAL/SQL board J1 to FRONT unit W1 to AF unit J1 9 - 3...

  • Page 39: Main Unit

    9-6 MAIN UNIT • TOP VIEW TXDET SEND DASTB TMUTE ATT2 ATT1 UNLK PSTB PDATA CHASSIS DEC2 RXADJ DEC1 WXDET to AF unit J5 TEMP to LOGIC BOARD J1 PDATA HLVL to AF unit J2 9 - 4...
  • Page 40 • BOTTOM VIEW (MAIN UNIT) 9 - 5...

  • Page 41: Af Unit

    9-7 AF UNIT • TOP VIEW to LOGIC board J2 to VR to FRONT board J1 unit W1 to MAIN unit J2 to CONNECT unit J5 HALL- to CHASSIS HALL+ to CONNECT/CONNECT-A to Optional to CHASSIS W1 unit J4 unit UT-112 9 - 6...
  • Page 42 • BOTTOM VIEW (AF UNIT) to MAIN unit 9 - 7...
  • Page 43 9-8 HM-137 9-9 HM-134 (OPTIONAL UNIT) • TOP VIEW • TOP VIEW to Speaker MICE to IC-M601/M602 FRONT unit W1 to Microphone 9 - 8...
  • Page 44 • BOTTOM VIEW (HM-134) • BOTTOM VIEW (HM-137) SCAN AF/MIC MICG RTXDA RRXDA 16/9 to IC-M601 CONNECT-A unit J1 9 - 9...

  • Page 45: Block Diagram

    SECTION 10 BLOCK DIAGRAM MAIN UNIT For other channels Q3, Q4 L18, L19 617DB-1327=P3 ALFYM450F=K 2SC4215 FL-285 PMBFJ310 D11 HSB88WS 3SK294 ACC UNIT CERAMIC XTAL HM-137 31.05MHz TA31136FN IC3A 2SC5110 NJM2902V BUFF WXDEC 2ND IF Q12 PMBFJ310 D32, D33 HVC358B 2SC4215 IC5E,F IC3B...

  • Page 46: Wiring Diagram

    SECTION 11 WIRING DIAGRAM CHASSIS FRONT UNIT MICG HAIL+ HAIL+ VR BOARD HAIL- HAIL- VOL1 VOL1 VOL2 VOL2 OPC-1176 W1 OPC-1175 LOGIC BOARD PDATA OPTIN OPSTB SCON AF UNIT CONNECT/-A UNIT MICI DETI MICO NMEAIN+ NMEAIN DETO NMEAOUT+ ICF3 NMEAIN+ NMEAIN+ SCOUT SCOUT...

  • Page 47: Voltage Diagram

    SECTION 12 VOLTAGE DIAGRAMS 12-1 LOGIC BOARD LOGIC BOARD D11-D18 3.3V 3.3V 3.3V HSU88 R101 47k R102 10k R91-R98 R103 10k R33 15k S818A33AVC-BGN-T2 TEMP TEMP 3.3V VOUT DTC144EU ON/OFF WXDEC WXDEC DEC1 DEC1 DA204K R31 1k RXADJ RXADJ SPPH22014A DEC2 DEC2 R32 1k...

  • Page 48: Main Unit

    R314 R299 VCC1 GND1 C102 NJM2902V R315 2SC4215 to LOGIC PDATA R316 PSTB VCC2 board J1 PSTB UNLK PDATA IC-M601 [HOL], [FRG] only DATA ATT1 R317 2.2k UNLK C109 C108 C107 C257 R208 R207 NJM2902V ATT2 R318 2.2k R209 0.01 0.01...
  • Page 49 MC120-E526HNA-100312 HSB88WS 4.7µ 617DB-1327=P3 617DB-1327=P3 3.71V 1.5p CDBC450CX24 100p 2.5p RX: 6.76V C96 0.001 TX: 0.0V MA742 PMBFJ310 1.2k 0.001 3SK294 2SC4215 220p FI1B FI1A TA31136FN FL-285 FL-285 R242 PMBFJ310 MC120-E526HNA-100312 MC120-E526HNA-100312 MC120-E526HNA-100312 MC120-E526HNA-100312 R241 180p 2SC5110 6.81V R338 MC138-E544ENAS-100014 ALFYM450F=K C419 C418...

  • Page 50: Af Unit

    0.001 CONT.A R38 33k CONT.D 2SJ144 R206 100k 2SD1664 INCMH CONT.B AESUB R313 R312 R311 C44 0.0022 CONT.C R210 10k IC-M601 only IC12 R208 10k PC357N6T NMEAIN+ IC19 HLVL TC7S14FU R222 R207 IC14 to FRONT MICG NJM2107F NMEAIN- R317 R318 unit W1 C43 0.027...

  • Page 51: Hm-137

    12-4 HM-137 UP KEY : 2.0V DOWN KEY : 3.0V 16/9 KEY : 3.8V 6.8k W1 (CHASSIS) DOWN 16/9 HANGER 470p 470p 12 - 5...

  • Page 52: Hm-134 (Optional Unit)

    P43/KR3 SEG14 DIM2 P44/KR4 SEG15 DIM3 P45/KR5 SEG16 AF/MIC P93/S16 SEG17 MICG P92/S17 NTCG16 SEG18 P91/S18 0.01 0.001 0.001 to IC-M601 SEG19 P90/S19 µPD789405AGK-A30-9EU VDD0 CONNECT-A SEG20 RTXDA 8.2k P87/S20 VSS0 unit J1 SEG21 RRXDA P86/S21 SEG22 P85/S22 SEG23 P84/S23...
  • Page 54 S-13908HZ-C1 1-1-32, Kamiminami, Hirano-ku, Osaka 547-0003, Japan C 2002 Icom Inc.

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