Icom IC-F50V Service Manual
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Icom IC-F50V Service Manual

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Enlarged version
VHF TRANSCEIVER
S-14406XZ-C1
Sep. 2007

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Summary of Contents for Icom IC-F50V

  • Page 1 VHF TRANSCEIVER S-14406XZ-C1 Sep. 2007...
  • Page 2 8. READ the instructions of test equipment throughly before connecting a test 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

    : –30˚C to +60˚C; –22˚F to +140˚F [USA], [EXP], [CHN] –25˚C to +55˚C [EUR] • Power supply requirement (nominal) : Specified Icom's battery packs only (7.2 V DC; negative ground) • Current drain (Approx.) : Receiving 85 mA (stand-by) 500 mA (max. audio with internal speaker) 350 mA (max.

  • Page 5: Inside Views

    SECTION 2 INSIDE VIEWS • FRONT UNIT AF POWER AMP (IC401: HD64F2268TFV) (IC405: TDA8547TS) CPU CLOCK RESET IC EXPANDER (X401: CR-764) (IC408: BD5242G) (IC410: CD4094BPWR) MIC AMP EEPROM (IC407: NJM12904V) (IC409: HN58X24256FPIE) • MAIN UNIT (IC6: M62363FP-650C) DISCRIMINATOR AF BUFFER, AF MIXER (X1: CDBKB450KCAY24) (IC5: NJM12904V) VIBRATION MOTOR...
  • Page 6 SECTION 3 DISASSEMBLY INSTRUCTION 1. REMOVING THE CHASSIS UNIT 3. REMOVING THE MAIN UNIT q Unsolder 6 points from the shield cover. q Unscrew the ANT nut, and remove the VR knob. w Unsolder 4 points from the contact spring. w Remove the VR washer, and unscrew the top screw.

  • Page 7: Receiver Circuits

    SECTION 4 CIRCUIT DESCRIPTION 4-1 RECEIVER CIRCUITS RF CIRCUITS While transmitting, serial-connected PIN diodes are ON, RF circuits consist of RF fi lters, antenna switch (ANT SW), thus the TX line is connected to the antenna, and the RX RF amplifi er (RF AMP), etc., and extracts and amplifi es the line is connected to the GND simultaneously to prevent TX signals of frequency which desired to receive.
  • Page 8 2ND IF AND FM DEMODULATOR CIRCUITS The 2nd IF circuits consist of 2nd mixer, 2nd IF filter, 2nd IF amplifier. And it converts the 1st IF signal into the 2nd IF IC (TA31136FNG) BLOCK DIAGRAM IF signal, then filters to remove unwanted signals and amplifi...

  • Page 9: Transmitter Circuits

    SQUELCH CIRCUITS • TONE SQUELCH • NOISE SQUELCH The tone squelch connects the RX AF line and activates The noise squelch cuts off the AF output signals when the AF power amplifier to emit the AF signals only when no RF signals are received. Extracting noise components receiving a signal which contains the tone frequency (approx.
  • Page 10 The applied MIC signals are amplified at the amplifier <CTCSS/DTCS> (TXA1), and level adjusted at the volume controller (VR1). CTCSS/DTCS signals ("CEN0"–"CEN2") are generated by The level adjusted MIC signals are applied (bypassed) the the CPU (F: IC401, pins 79–81) and converted its wave compressor section, pre-emphasis section, TX/RX HPF, form by R461–R463 (F), then passed through the LPF (F: de-scrambler, limiter, splatter, in sequence, then applied to...
  • Page 11 TRANSMIT AMPLIFIERS APC CIRCUIT The transmit amplifiers consist several RF amplifiers (pre- The APC (Automatic Power Control) circuit stabilizes transmit output power to prevent transmit output power level driver, driver, power), and amplify the TX VCO output to the change which is caused by load mismatching or heat effect, transmit output level.

  • Page 12: Frequency Synthesizer Circuits

    • TX VCO 4-3 FREQUENCY SYNTHESIZER CIRCUITS The TX VCO oscillates 136 to 174 MHz TX signal. The VCOs generated TX signal is applied to the pre-driver (one of TX A VCO is an oscillator which its oscillation frequency is AMPs) via the TX/RX SW.

  • Page 13: Other Circuits

    4-4 OTHER CIRCUITS VIBERATION MOTOR CIRCUIT AGC (Automatic Gain Controller) CIRCUIT (except [A], [D], [G], [J]) The AGC circuit effectively reduces the RX signal level if MF1 is a vibration motor. When the matched RX code signal the signal is strong, and raises it when it is weaker. The is received, MF1 rotates to produce viberation.

  • Page 14: Cpu (F: Ic401) Port Allocations

    4-6 CPU (F: IC401) PORT ALLOCATION Line Description name Line Description [PTT] key (F: S401). name (Pulled up) 1– SEG23–13 Serial data I/O control signal to the MDIR baseband IC (M: IC10). SEG12 LCD segment ports. 72– SENC3– 15– 2/5 tone, DTMF signals. SEG11–1 SENC6 MSK data RX flag/flame detect...

  • Page 15: Adjustment Procedures

    SECTION 5 ADJUSTMENT PROCEDURE 5-1 PREPARATION ¤ REQUIRED EQUIPMENTS EQUIPMENT GRADE AND RANGE EQUIPMENT GRADE AND RANGE JIG cable CS-F50V CLONING SOFTWARE Cloning software (Modifi ed OPC- (See the page 5-3) (Revision 1.0 or later) 966C/UC) Measuring range : 0.1–10 W Frequency range : 0.1–300 MHz Frequency range : 100–300 MHz...
  • Page 16 ¤ STARTING SOFTWARE ADJUSTMENT q Connect the transceiver and PC with OPC-966/U. (see the page 5-3) w Turn the transceiver power ON. e Boot up Windows, and click the program group ‘CS-F50V’ in the ‘Programs’ folder of the [Start] menu, then CS-F50V’s window appears.
  • Page 17 ▄ PC CONNECTIONS OPC-966U (USB type) to an RS-232C port JIG CABLE RS-232C cable (straight) JIG CABLE CAUTION: Attach the [SP MIC] jack snugly, but do not overtighten. An overtightened jack will damage the connector pins in the transceiver. ▄ JIG CABLES OPC-966U EXT.

  • Page 18: Frequency Adjustment

    5-2 FREQUENCY ADJUSTMENT 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 [ADJUST ITEM] PLL LOCK 1 • Channel : 1-1 Click [I/O Update (F5)] in the [Adjust]...
  • Page 19 5-2 FREQUENCY ADJUSTMENT (continued) 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 [ADJUST ITEM] REFERENCE 1 • Channel : 1-2 Loosely couple a Frequency Counter to 174.000 MHz...

  • Page 20: Transmit Adjustment

    5-3 TRANSMIT ADJUSTMENT 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 [ADJUST ITEM] TRANSMIT 1 • Channel : 1-3 Connect an RF power meter to the 5.0 W...
  • Page 21 5-3 TRANSMIT ADJUSTMENT (continued) 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 [ADJUST ITEM] FM DEVIATION 1 • Channel : 1-6 Connect an Modulation Ana- ±2.05 to 2.15 kHz...
  • Page 22 5-3 TRANSMIT ADJUSTMENT (continued) 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 [ADJUST ITEM] MODULATION 1 • Channel : 1-9 Connect an Oscilloscope to the...
  • Page 23 5-3 TRANSMIT ADJUSTMENT (continued) 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 [ADJUST ITEM] CTCSS/DTCS 1 • Channel : 1-12 Connect a Modulation Analyzer ±0.66 to 0.70 kHz...

  • Page 24: Receive Adjustment

    5-4 RECEIVE ADJUSTMENT 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 [ADJUST ITEM] RECEIVE 1 • Channel : 1-13 Put the cursor on the [BPF T1], (Automatic...
  • Page 25 5-4 RECEIVE ADJUSTMENT (continued) 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 [ADJUST ITEM] S-METER NOTE: “RECEIVE SENSITIVITY” must be adjusted before “S-METER.” Otherwise, “S-METER” will not [S-METER] be adjusted properly.
  • Page 26 5-4 RECEIVE ADJUSTMENT (continued) 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 [ADJUST ITEM] SQUELCH 1 • Channel : 1-15 Set the [SQL] value to close •...

  • Page 27: Parts List

    SECTION 6 PARTS LIST [FRONT UNIT] [FRONT UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION IC401 1140010191 S.IC HD64F2268TF20V 22.9/28 R484 7030005090 S.RES ERJ2GEJ 104 X (100 k) 15.6/20.9 IC403 1110005340 S.IC NJM12902V-TE1 16.9/42.9 R485 7030005090 S.RES ERJ2GEJ 104 X (100 k) 14.2/21.7 IC405 1110006770 S.IC...

  • Page 28: Connect Unit

    [FRONT UNIT] [VR UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION C466 4030017420 S.CER ECJ0EC1H470J 36.9/14.5 R601 7210003130 VAR TP76N97N-13F-10KA-2497 C467 4030017420 S.CER ECJ0EC1H470J 30.5/13.1 C468 4030017420 S.CER ECJ0EC1H470J 40.4/11.5 C473 4030016790 S.CER ECJ0EB1C103K 38.1/15.9 W601 8900012340 CBL OPC-1260 C474 4030018860 S.CER ECJ0EB0J105K 5/26.6 C475 4030017460 S.CER ECJ0EB1E102K...
  • Page 29 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION 1110003201 S.IC TA31136FNG (EL) 19.1/9.1 6200003640 S.COL MLF1608E 100K-T 41.4/24.4 1110002751 S.IC TA75S01F (TE85R,F) 52.3/18.1 6200007760 S.COL LQW2BHN82NJ03L 38.8/24.9 1140005991 S.IC MB15A02PFV1-G-BND-ERE1 28.7/24.1 6200008090 S.COL LQW2BHN68NJ03L 37.8/31.6 1110005330 S.IC NJM12904V-TE1 34.3/9.3 6200007170 S.COL MLF1608A 3R3K-T 41/21.9...
  • Page 30 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION 7030007290 S.RES ERJ2GEJ 222 X (2.2 k) 47/39 R212 7030005580 S.RES ERJ2GEJ 560 X (56) R100 7030005050 S.RES ERJ2GEJ 103 X (10 k) 47.1/15.2 [C], [I], [F], [L] only 25/38.4 R101 7030005120 S.RES ERJ2GEJ 102 X (1 k) 45.5/15.2...
  • Page 31 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION C105 4030017460 S.CER ECJ0EB1E102K 44.5/33.9 C240 4030017460 S.CER ECJ0EB1E102K 32.6/12.3 C106 4030017420 S.CER ECJ0EC1H470J 55.1/30.8 C241 4030017460 S.CER ECJ0EB1E102K 50.1/37.7 C107 4030017460 S.CER ECJ0EB1E102K 49.3/22.7 C242 4030017460 S.CER ECJ0EB1E102K 33.7/36.6 C108 4030016790 S.CER ECJ0EB1C103K 54.2/34.4...
  • Page 32 [MAIN UNIT] ORDER DESCRIPTION LOCATION 6910015370 S.BEA ACZ1005Y-102-T 25.4/35.1 6910015600 S.BEA ACZ1005Y-241 (240) 23.9/21.7 6910015600 S.BEA ACZ1005Y-241 (240) 14/26.1 6910015370 S.BEA ACZ1005Y-102-T 28.8/29.7 6910014730 S.BEA MPZ2012S331A-T 75.6/18.6 6910019100 S.BEA MPZ1608S101AT 75.9/26.2 M.=Mounted side (T: Mounted on the Top side, B: Mounted on the Bottom side) S.=Surface mount 6 - 6...

  • Page 33: Mechanical Parts

    SECTION 7 MECHANICAL PARTS [CHASSIS PARTS] [MAIN UNIT] ORDER ORDER DESCRIPTION QTY. DESCRIPTION QTY. 2710000850 QX10A (R5.5X3)3.0V (WIRE30MM) 6910014700 2600 ANT CONNECTOR Except [A], [D], [G], [J] 8010020920 3060 CHASSIS MP1* 8410002531 2681 PA HEATSINK-1 8950005512 2403 CONTACT SPRING -2 MP2* 8510015520 2681 VCO CASE 8930058561 2403 A-MAIN SEAL-1...
  • Page 34 J1(CO) CONNECT UNIT UNIT ABBREVIATIONS: W404(F) F=FRONT UNIT M=MAIN UNIT MP419 ( F ) V=VR UNIT <A> CO=CONNECT UNIT C=CHASSIS PARTS MP6 ( C ) FRONT Unit R601 ( V ) MP9 ( C ) MP424 ( F ) MP8 ( C ) MP407 ( F ) W404 J1 ( C )

  • Page 35: Board Layouts

    SECTION 8 BOARD LAYOUTS BAT+ BAT– • FRONT UNIT (TOP VIEW) • MAIN UNIT – (TOP VIEW) • VR UNIT (TOP VIEW) R601 ECM(MC1) R521 R524 • CONNECT UNIT R523 J402 Q406 (TOP VIEW) R522 C502 C510 R518 C503 C485 R515 C504 R479...

  • Page 36: Main Unit (Right Side)

    (BOTTOM VIEW) • FRONT UNIT (BOTTOM VIEW) • VR UNIT (BOTTOM VIEW) B6803 R445 C426 MC401 R539 • CONNECT UNIT (BOTTOM VIEW) C512 R457 OPTV MICE RESET DS402 DS403 S-14406XH-P2 Printed in Japan © 2007 Icom Inc. 8 - 2...
  • Page 37 SECTION 9 BLOCK DIAGRAM 136-174MHz Q15:XP1214 MAIN UNIT TEMP 2SK880 KTC4075 Q16:KRC404E Q14 2SC4226 D2:1SV307 RIPPLE D19,20:HVC376B 2SC5110 RD01MUS1 RD07MVS2 RB706F LVIN D5:1SV307 BUFF HVC375B RX VCO DRIVE DRIVE 15.3MHz IC16 D14,D15 NJM12904 CR-783 2SC5107 2SC5107 MA2S077 LOOP TX/RX BUFF TCXO BUFF BUFF...
  • Page 38 SECTION 10 VOLTAGE DIAGRAM R420 R421 R422 R423 CPU5 100K 100K 100K E P 7 0 1 FRONT UNIT AF O AF O PRG21BC4R7MM1RA E P 7 0 2 R515 E P 7 0 3 R488 MICE 100K OPTV 2403 R489 MMZ1005S601CT x3 4.96V...
  • Page 39 MAIN UNIT (Left side) ERTJ0EP473J R189 220K TEMP IC12 R188 C219 EXSM TX:0.00V SIGNAL RX:4.97V 220K R186 0.001 NJM12904V R119 100K C228 C223 VIN1 VIN8 TX:5.01V VOUT1 VOUT8 Q’S RX:0.00V 5.02V R182 R181 M P2(CHASSIS) R183 VOUT2 VOUT7 VIN2 VIN7 CD4094BPWR 4.98V RESET...
  • Page 40 MAIN UNIT (Right side) EXCCL3225U TX:4.75V L2 0 MMZ1608Y102BT RX:0.00V ACZ1005Y R9 8 3.83V KTC4075 RX VCO TX:1.69V RX:0.00V 3.9K 1.8K R103 REF OSC 4.04V J1(CHASSIS) R8 5 R7 9 470K C211 IC16 C127 L2 6 C126 82 P 27.2N VCON 0.001 R104...
  • Page 41 Phone : +34 (93) 590 26 70 Fax : +34 (93) 589 04 46 Glenwood Centre #150-6165 : http://www.icomspain.com Highway 17 Delta, B.C., V4K 5B8, Canada E-mail : icom@icomspain.com Phone : +1 (604) 952-4266 Fax : +1 (604) 952-0090 : http://www.icomcanada.com E-mail : info@icomcanada.com Unit 9, Sea St., Herne Bay, Kent, CT6 8LD, U.K.
  • Page 42 S-14406XZ-C1 1-1-32, Kamiminami, Hirano-ku, Osaka 547-0003, Japan © 2007 Icom Inc.

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