Icom IC-F3 Service Manual
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Icom IC-F3 Service Manual

Icom IC-F3 Service Manual

Vhf fm and uhf fm transceivers
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See also: Instruction Manual , User Manual
SERVICE
MANUAL
VHF FM TRANSCEIVERS
iC-f3
iC-f3s
UHF FM TRANSCEIVERS
iC-f4
iC-f4s

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Summary of Contents for Icom IC-F3

  • Page 1 SERVICE MANUAL VHF FM TRANSCEIVERS iC-f3 iC-f3s UHF FM TRANSCEIVERS iC-f4 iC-f4s...
  • Page 2 INTRODUCTION This service manual describe the latest information for the IC-F3/IC-F3S and IC-F4/IC-F4S at the time of publication. DANGER NEVER connect the transceiver to an AC outlet or to a DC power supply that uses more than 16 V. Such a connection could cause a fire hazard and/or electric shock.

  • Page 3: Table Of Contents

    CPU PORT ALLOCATIONS ........................4-4 SECTION 5 ADJUSTMENT PROCEDURES 5 - 1 PREPARATION ...........................5-1 5 - 2 PLL ADJUSTMENT for IC-F3/S ......................5-3 5 - 3 TRIMMER ADJUSTMENT for IC-F3/S....................5-4 5 - 4 TRANSMITTER ADJUSTMENT for IC-F3/S ..................5-5 5 - 5 RECEIVER ADJUSTMENT for IC-F3/S ....................5-6 5 - 6 PLL ADJUSTMENT for IC-F4/S ......................5-7...

  • Page 4: Specifications

    SECTION 1 SPECIFICATIONS IC-F3/F3S IC-F4/F4S 400.000–430.000 MHz (L-band) 136.000–150.000 MHz (L-band) 440.000–470.000 MHz (ML-band) Frequency coverage 470.000–500.000 MHz (MH-band) 146.000–174.000 MHz (H-band) 490.000–512.000 MHz (H1-band) 490.000–520.000 MHz (H2-band) Type of emission 16K0F3E (W-type), 14K0F3E (M-type: F3/S only), 8K50F3E (N-type) Number of channels...

  • Page 5: Inside Views

    SECTION 2 INSIDE VIEWS 2-1 IC-F3/S • MAIN UNIT TOP VIEW BOTTOM VIEW Low-pass filter circuit APC control circuit Current detector circuit Microphone amplifier circuit RF amplifier (Q12: 3SK239) Antenna switching T/R switching circuit circuit (D1: MA77) (D4: MA77) 1st mixer circuit...

  • Page 6: Ic-F4/S

    2-2 IC-F4/S • MAIN UNIT TOP VIEW BOTTOM VIEW Low-pass filter circuit APC control circuit Current detector circuit Microphone amplifier circuit RF amplifier (Q12: 3SK239) Antenna switching circuit (D1: MA77) T/R switching circuit (D4: MA77) FM IF IC (IC2: TA31136FN) Crystal filter 1st mixer circuit (FI1)

  • Page 7: Disassembly Instruction

    SECTION 3 DISASSEMBLY INSTRUCTIONS 3-1 DISASSEMBLY INSTRUCTION • Removing the chassis panel q Unscrew 1 nut , and remove 1 knob w Unscrew 2 screws, e Take off the chassis in the direction of the arrow. r Unplug J6 to separate front panel and chassis. Chassis (nickel, 2 mm) 2 Knob...

  • Page 8: Optional Unit Installations

    3-2 OPTIONAL UNIT INSTALLATIONS 1 Remove the option cover. 2 Remove the bottom protective paper of sponge. 3 Connect either a UT-80, UT-96 or UT-105 optional unit to J5. 4 Attached the 1556 sponge to the specified position at the unit as following illustration. UT-80 UT-96 5 Replace the option cover to the chassis-hole.

  • Page 9: Circuit Description

    The filtered 1st IF signal is while D8 (IC-F3/S)/D406 and D8 (IC-F4/S) is/are turned ON. applied to the IF amplifier (Q14 for IC-F3/S, Q400 for IC- Thus transmit signals are blocked from entering the receiv- F4/S), then applied to the 2nd mixer circuit (IC2, pin 16).

  • Page 10: Transmitter Circuits

    IC-F3/S, Q3, Q403 for IC-F4/S), drive (Q2) and power ampli- connected in parallel to the active filter input (pin 8) to con- fier (Q1) to obtain 5 W (IC-F3/S)/4 W (IC-F4/S) of RF power trol the input noise level. (at 9.6 V DC). The amplified signal passes through the antenna switching circuit (D1), and low-pass filter and is The active filter section amplifies noise components.

  • Page 11: Pll Circuit

    The signal output from the current sensor circuit (Q9, Q28; 4-4 POWER SUPPLY CIRCUITS IC-F3/S) or the power detector circuit (D2; IC-F4/S) is VOLTAGE LINE applied to the differential amplifier (IC3a, pin 2), and the “T4” Line Description signal from the expander (IC10, pin 14), controlled by the The voltage from the attached battery pack.

  • Page 12: Cpu Port Allocations

    FM IF IC (IC2). signals while transmitting. Outputs LCD contrast control signal. CONT High: When normal level is selected 36–41 KS0–KS5 (IC-F3/S) Output ports for key matrix. 40, 41 KS4, KS5 (IC-F4/S) Outputs mic. mute control signal. Low: When DTMF or 2/5-tone sig- nal is selected Outputs RX mute control signal.

  • Page 13: Adjustment Procedures

    SECTION 5 ADJUSTMENT PROCEDURES 5-1 PREPARATION REQUIRED TEST EQUIPMENT EQUIPMENT GRADE AND RANGE EQUIPMENT GRADE AND RANGE Output voltage : 9.6 V DC Audio generator Frequency range : 300–3000 Hz DC power supply Current capacity : 5 A or more Output level : 1–500 mV Measuring range...
  • Page 14 • SCREEN DISPLAY EXAMPLE ***** Trimmer Control Software for IC–F3 Series ***** Connected battery voltage A/D 1 (VIN) 171 : ABh 10.729V D/A 1 (REF) 120 : 78h 2.353V A/D 2 (REMOTE) 255 : FFh 5.000V D/A 2 (MODE) 131 : 83h 2.569V A/D 3 (SD) 54 : 36h...

  • Page 15: Pll Adjustment For Ic-F3/S

    5-2 PLL ADJUSTMENT for IC-F3/S MEASUREMENT ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITIONS VALUE UNIT LOCATION UNIT ADJUST PLL LOCK • Operating freq. : MAIN Connect a multi-meter 3.0 V (L-band) MAIN VOLTAGE 150.000 MHz (L-band) to check point CP1. 4.3 V (H-band) 174.000 MHz (H-band)

  • Page 16: Trimmer Adjustment For Ic-F3/S

    5-3 TRIMMER ADJUSTMENT for IC-F3/S Select an operation using [ ]/[ ] keys, then set the specified value using [ ]/[ ] keys on the connected computer keyboard. MEASUREMENT ADJUSTMENT ADJUSTMENT CONDITION VALUE UNIT LOCATION REFERENCE • Operating freq. : Loosely couple a frequency 136.000000 MHz...

  • Page 17: Transmitter Adjustment For Ic-F3/S

    5-4 TRANSMITTER ADJUSTMENT for IC-F3/S The following adjustment must be performed after “REFERENCE FREQUENCY ADJUSTMENT” in section 5-3. MEASUREMENT ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITIONS VALUE UNIT LOCATION UNIT ADJUST Set to flat wave DTCS WAVE 1 • Operating freq. : Connect an FM devia-...

  • Page 18: Receiver Adjustment For Ic-F3/S

    5-5 RECEIVER ADJUSTMENT for IC-F3/S The following adjustment must be performed after “BPF1–BPF4 ADJUSTMENT” in section 5-3. MEASUREMENT ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITIONS VALUE UNIT LOCATION UNIT ADJUST SQUELCH • Operating freq. : Connect an SSG to 12 dB SINAD Output LEVEL 136.000 MHz (L-band)

  • Page 19: Pll Adjustment For Ic-F4/S

    5-6 PLL ADJUSTMENT for IC-F4/S MEASUREMENT ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITIONS VALUE UNIT LOCATION UNIT ADJUST PLL LOCK • Operating freq. : MAIN Connect a multimeter 1.3 V MAIN VOLTAGE 400.000 MHz (L-band) to check point CP1. 440.000 MHz (ML-band) 470.000 MHz (MH-band) 490.000 MHz (H1/H2-bands) •...

  • Page 20: Trimmer Adjustment For Ic-F4/S

    5-7 TRIMMER ADJUSTMENT for IC-F4/S Select an item using [ ]/[ ] keys on the connected computer keyboard. MEASUREMENT ADJUSTMENT ADJUSTMENT CONDITION VALUE ADJUSTMENT UNIT LOCATION Push [ ] or [ ] REFERENCE • Operating freq. : Loosely couple a 400.000000 MHz keys on the com- FREQUENCY...

  • Page 21: Transmitter Adjustment For Ic-F4/S

    5-8 TRANSMITTER ADJUSTMENT for IC-F4/S The following adjustment must be performed after “REFERENCE FREQUENCY ADJUSTMENT” in section 5-7. MEASUREMENT ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITIONS VALUE UNIT LOCATION UNIT ADJUST • Operating freq. : Connect an FM devia- ±4.1 kHz MAIN R119 DEVIATION 400.000 MHz (L-band) panel...

  • Page 22: Receiver Adjustment For Ic-F4/S

    5-9 RECEIVER ADJUSTMENT for IC-F4/S The following adjustment must be performed after “BPF1–BPF4 ADJUSTMENT” in section 5-7. MEASUREMENT ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITIONS VALUE UNIT LOCATION UNIT ADJUST SQUELCH • Operating freq. : Connect an SSG to 12 dB SINAD Output LEVEL 400.000 MHz (L-band) panel...

  • Page 23: Parts List

    SECTION 6 PARTS LIST 6-1 IC-F3/F3S [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 1130007610 S.IC µPD3140GS-E1 (DS8) 1750000130 S.DIODE DA204U T107 1110003490 S.IC TA31136FN (D,EL) 1790000620 S.DIODE MA77 (TX) 1110003780 S.IC NJM2902V-TE1 1730002260 S.ZENER MA8030-H (TX) 1130008090 S.IC BU4066BCFV-E1 1110001810 S.IC...
  • Page 24 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 7030003660 S.RESISTOR ERJ3GEYJ 683 V (68 kΩ) R115 7030003690 S.RESISTOR ERJ3GEYJ 124 V (120 kΩ) ERJ3GEYJ 471 V (470 Ω) 7030003400 S.RESISTOR R116 7030003440 S.RESISTOR ERJ3GEYJ 102 V (1 kΩ) 7030003660 S.RESISTOR ERJ3GEYJ 683 V (68 kΩ) R117 7030003460 S.RESISTOR...
  • Page 25 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION R215 7030005520 S.RESISTOR RR0816R-334-D (330 kΩ) 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A Ò R216 7030005630 S.RESISTOR RR0816R-154-D (150 kΩ) 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A Ó R217 7030003440 S.RESISTOR ERJ3GEYJ 102 V (1 kΩ) 4030008650 S.CERAMIC C1608 JB 1H 332K-T-A Ò...
  • Page 26 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION C119 4030008680 S.CERAMIC C2012 JF 1C 105Z-T-A C205 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A C120 4030011600 S.CERAMIC C1608 JB 1C 104KT-N C209 4030011600 S.CERAMIC C1608 JB 1C 104KT-N C121 4030007170 S.CERAMIC C1608 CH 1H 221J-T-A C210 4030011600 S.CERAMIC C1608 JB 1C 104KT-N...
  • Page 27 [MAIN UNIT] ORDER DESCRIPTION 6450001680 CONNECTOR HSJ1122-010010 6450001690 CONNECTOR HSJ1456-01-220 6450000870 CONNECTOR HEC2711-01-020 6510018430 S.CONNECTOR AXN330C038P 6510007080 CONNECTOR PI28A-02M 6910010850 CONNECTOR IMSA-9230B-1-05Z080-T 5030001460 LCD LM-1462B 5010000160 S.LED LNJ310M6URA 5010000160 S.LED LNJ310M6URA 5040002190 S.LED LNJ808R8ERA 7700002160 MICROPHONE KUC3523-040245 2230000900 S.SWITCH JPM1990-2013R 2510000960 SPEAKER K036NA500-26 7030003860 S.JUMPER...
  • Page 28 6-2 IC-F4/F4S [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 1130007610 S.IC µPD3140GS-E1 (DS8) D406 1790000620 S.DIODE MA77 (TX) 1110003490 S.IC TA31136FN (D,EL) 1110003780 S.IC NJM2902V-TE1 1130008090 S.IC BU4066BCFV-E1 2010002100 XTAL FL-267 (46.35 MHz) 1110001810 S.IC TA7368F (TP1) 2010002120 XTAL FL-271 (46.35 MHz) 1180001080 S.IC S-81250PG-PD-T1...
  • Page 29 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION ERJ3GEYJ 124 V (120 kΩ) N-e 7030003670 S.RESISTOR ERJ3GEYJ 823 V (82 kΩ) R107 7030003690 S.RESISTOR 7030003560 S.RESISTOR ERJ3GEYJ 103 V (10 kΩ) ERJ3GEYJ 154 V (150 kΩ) N-u 7030003700 S.RESISTOR ERJ3GEYJ 274 V (270 kΩ) W-e 7030003440 S.RESISTOR ERJ3GEYJ 102 V (1 kΩ) 7030003730 S.RESISTOR...
  • Page 30 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION R204 7030003500 S.RESISTOR ERJ3GEYJ 332 V (3.3 kΩ) R444 7030003560 S.RESISTOR ERJ3GEYJ 103 V (10 kΩ) ERJ3GEYJ 221 V (220 Ω) R205 7030003460 S.RESISTOR ERJ3GEYJ 152 V (1.5 kΩ) R445 7030003360 S.RESISTOR R207 7030003640 S.RESISTOR ERJ3GEYJ 473 V (47 kΩ)
  • Page 31 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 4030009910 S.CERAMIC C1608 CH 1H 040B-T-A 4030009500 S.CERAMIC C1608 CH 1H 0R5B-T-A 4030006850 S.CERAMIC C1608 JB 1H 471K-T-A 4030007090 S.CERAMIC C1608 CH 1H 470J-T-A 4030009920 S.CERAMIC C1608 CH 1H 050B-T-A 4030007000 S.CERAMIC C1608 CH 1H 090D-T-A 4030007020 S.CERAMIC C1608 CH 1H 120J-T-A...
  • Page 32 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION C169 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A C402 4030006990 S.CERAMIC C1608 CH 1H 080D-T-A C170 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A C403 4030007090 S.CERAMIC C1608 CH 1H 470J-T-A C171 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A C404 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A...
  • Page 33 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION C436 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A 6510007080 CONNECTOR PI28A-02M C438 4030008630 S.CERAMIC C1608 JF 1C 104Z-T-A 6910010850 CONNECTOR IMSA-9230B-1-05Z080-T C439 4030008630 S.CERAMIC C1608 JF 1C 104Z-T-A C440 4030008630 S.CERAMIC C1608 JF 1C 104Z-T-A C441 4030008630 S.CERAMIC C1608 JF 1C 104Z-T-A...

  • Page 34: Mechanical Parts And Disassembly

    SECTION 7 MECHANICAL PARTS AND DISASSEMBLY 7-1 CABINET PARTS [CHASSIS PARTS] for IC-F3/S [CHASSIS PARTS] for IC-F4/S ORDER ORDER QTY. QTY. DESCRIPTION DESCRIPTION 8010016822 1922 chassis-2 8010016822 1922 Chassis-2 8210014561 1922 front panel assembly-1 (F3) 8210014731 1922 Front panel (B) assembly-1 (F4)
  • Page 35 MP26 (C) 7-2 ACCESSORIES MP14 (C): F3/S ORDER DESCRIPTION QTY. MP36 (C): F4/S MP37 (C): F3/S only Optional product Antenna FA-SC24V-1 (F3/S: L-band) MP12 (C) Optional product Antenna FA-SC54V-1 (F3/S: H-band) MP25 (C) MP29 (C) MP4 (C) Optional product Antenna FA-SC24U-1 (F4/S: L-band) Optional product Antenna FA-SC56U-2 (F4/S: ML-band) MP39 (C): F3/S Antenna FA-SC71U-2 (F4/S: MH, H...
  • Page 36 SECTION SECTION 8 PARTS LIST SEMI-CONDUCTOR INFORMATIONS 8-1 TRANSISTORS AND FETs 8-2 DIODES NAME SYMBOL INSIDE VIEW NAME SYMBOL INSIDE VIEW NAME SYMBOL INSIDE VIEW NAME SYMBOL INSIDE VIEW pink 2SA1362 - GR DTA144EU 1T365-01 pink MA6S121 2SA1588 - GR UN911H line A2 A1...

  • Page 37: Board Layouts

    SECTION 9 BOARD LAYOUTS 9-1 IC-F3/S MAIN UNIT The combination of this page and the next page shows the unit layout in the same configuration as MICROPHONE the actual P.C. Board. • TOP VIEW VOL GND VOL OUT to VR UNIT...
  • Page 38 The combination of this page and the next page shows the unit layout in the same configuration as the actual P.C. Board. • BOTTOM VIEW PTT switch EXT. SP CLONE EXT. MIC CHARGER to OPTIONAL UNIT • BOTTOM VIEW to MAIN UNIT VOLOUT VOLIN BATT...

  • Page 39: Ic-F4/S Main Unit

    9-3 IC-F4/S MAIN UNIT The combination of this page and the next page MICROPHONE shows the unit layout in the same configuration as the actual P.C. Board. • TOP VIEW VOL GND VOL OUT to VR UNIT VOL IN SPEAKER SP SPG P1 ANTENNA 9 - 3...
  • Page 40 The combination of this page and the next page shows the unit layout in the same configuration as the actual P.C. Board. • BOTTOM VIEW PTT SWITCH EXT. SP CLONE EXT. MIC CHARGER Note: Connect below parts that depending band. *1 ..

  • Page 41: Block Diagram

    SECTION 10 BLOCK DIAGRAMS 10-1 IC-F3/S 10 - 1...

  • Page 42: Ic-F4/S

    10-2 IC-F4/S 10 - 2...

  • Page 43: Voltage Diagram

    AF OUT DA204U R174 R191 R192 R224 C253 C252 C184 33k [W], [M] 39k [N] CLONE MA111 C228 EXT. SP 0.01 IROCH IC-F3 only R245 R238 C169 R195 R196 C167 C168 C292 R194 IC-F3S=open R190 R207 100k 100k 0.001 100k 100k 0.001...
  • Page 44 470k 100k FRQCON 15.3 MHz LNJ310M6URA CR-575A e R183 CTCSS CR-576A u HVU17 R150 0.01 LNJ310M6URA R234 LVIN 2SC2712 R204 LNJ808R8ERA VCC1 GND1 3.3k 1k 4 0.01 PLST VCC2 R155 R205 1.5k DATA UNLK GND2 LM-1462B 47nH [L] 0.001 COM1 SEG40 COM1 82nH [H]...
  • Page 45 Note [L] ..L-band [ W] ..W-type e ..ETS/CEPT version [H] ..H-band [ M ] ..M-type u ..EIA/TIA version [ N ] ..N-type R161 TX 174 MHz : 4.3V 0.15 R185 RX 174 MHz : 3.6V 470k 100k FRQCON...
  • Page 46 0.001 [H] C228 R257 R145 R121 3.3k C146 0.01 IROCH C147 R108 3.9k C286 NJM2902V C151 EXT. SP 0.001 C150 C152 IC-F3 only R245 R238 C133 150k 0.0022 R170 C149 0.047 C167 C168 C169 R194 R195 R196 IC-F3S=open R190 C292 R207...

  • Page 47: Ic-F4/S

    11-2 IC-F4/S TONE C223 1 30 0.01 PTTIN PTTIN MODCON PTTOUT PTTOUT MICOUT MICOUT 5.0V MICMUTE MICIN MICIN AFONOP AFONOP L409 4.95V 4.7 H BEEPOUT BEEPOUT CPU5 CPU5 2SB1132R C224 C428 C429 C174 TEMPS 0.01 R182 RXMUTE NTCCF20124AH IC11 R434 IC10 R215 330k...
  • Page 48 Note [L ] ..L-band (400 - 430 MHz) ] ..H [ML] ..ML-band (440 - 470 MHz) ] ..H [M H]..MH-band (470—500 MHz) C234 15.3 MHz 0.001 470k 100k FRQCON R185 LNJ310M6URA 0.001 0.01 HVU17 C446 CR-576A LED ON : 5.7V CTCSS R150...
  • Page 49 Note [L] ..L-band (400 - 430 MHz) [ W] ..W-type e ..ETS/CEPT version ] ..H -band (490—512 MHz) [ML] ..ML-band (440 - 470 MHz) [ N ] ..N-type u ..EIA/TIA version ] ..H -band (490—520 MHz) [M H]..MH-band (470—500 MHz) R161...
  • Page 50 Note [L] ..L-band (400 - 430 MHz) [W ] ..W-type e ..ETS/CEPT version ] ..H -band (490—512 MHz) [ML] ..ML-band (440 - 470 MHz) [ N ] ..N-type ] ..H -band (490—520 MHz) u ..
  • Page 51 08190 Sant Cugat del Valles Barcelona, SPAIN Phone : ( 93 ) 589 46 82 Fax : ( 93 ) 589 04 46 A Division of Icom America Inc. 3071 #5 Road, Unit 9, Richmond, B.C., V6X 2T4, Canada E-mail : icom@lleida.com...
  • Page 52 A-5452MI-S-q 6-9-16, Kamihigashi, Hirano-ku, Osaka 547-0002, Japan © 1997 Icom Inc.

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