Icom IC-F310 Service Manual
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Icom IC-F310 Service Manual

Vhf fm transceiver
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SERVICE
MANUAL
VHF FM TRANSCEIVER
iF310
iF310S
iF320
iF320S

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Summary of Contents for Icom IC-F310

  • Page 1 SERVICE MANUAL VHF FM TRANSCEIVER iF310 iF310S iF320 iF320S...
  • Page 2 IC-F310 MAIN UNIT 5 pieces 6. DO NOT transmit power into a signal generator or a 8810005840 Screw PH BT M3 x 8 NI-ZU IC-F310 Bottom cover 10 pieces sweep generator. Addresses are provided on the inside back cover for your 7.
  • Page 3 SEMI-CONDUCTOR INFORMATION SECTION 9 BOARD LAYOUTS 9 - 1 FRONT UNIT (IC-F310/F320) ........................9 - 1 9 - 2 FRONT UNIT (IC-F310S/F320S) .........................9 - 3 9 - 3 MAIN UNIT (IC-F310/F310S) ........................9 - 5 9 - 4 MAIN UNIT (IC-F320/F320S) ........................9 - 7...
  • Page 4 SECTION 1 SPECIFICATIONS IC-F310/F310S (PMR) IC-F320/F320S (LMR) Mesurement method ETS 300 086 EIA/TIA-152C/204D 136–155 MHz Frequency coverage 146–174 MHz × × F310 : 32 (16 ch 2 banks) F320 : 32 (16 ch 2 banks) Number of channels × F310S: 8 ch, or 4 ch...
  • Page 5 SECTION 2 INSIDE VIEW Power module (IC1) PLL IC (IC2: UPD3140GS) Low-pass filter CPU5V Regurator (IC9: S-81250PG-PD) ANT SW RF amplifier AF power amplifier (Q12: 35K239) (IC10: LA4425A) 1st IF filter (FI1: FL-285) High-pass filter (IC8: NJM2904V) FM IF IC *AF switching IC (IC3: TA31136FN) (IC4: BU4066 BCFV)
  • Page 6 SECTION 3 DISASSEMBLY INSTRUCTIONS • Opening case 6 Lift the front portion of the main unit and remove it. 1 Unscrew 4 screws, A, and remove the bottom cover. 2 Unscrew 2 screws, B, and remove the front case. • Instration location UT-96 TONE UNIT UT-105 SmarTrank 2 Logic Board...

  • Page 7: Receiver Circuits

    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 signals to a fixed The antenna switching circuit functions as a low-pass filter frequency of the 1st IF signal with the PLL output frequency.

  • Page 8: Transmitter Circuits

    4-1-5 AF AMPLIFIER CIRCUIT (MAIN unit) A portion of the AF signals from the AF amplifier (IC7a) passes through the low-pass filter (FRONT unit; Q5) to The AF amplifier circuit amplifies the demodulated AF sig- remove AF (voice) signals and is applied to the CTCSS or nals to drive a speaker.

  • Page 9: Pll Circuits

    (IC1) to obtain 45 W (for IC-F320; 25 W for sists of the PLL IC (IC2), loop filter and reference oscillator IC-F310) of RF power. circuit and employs a pulse swallow counter. The amplified signal is passed through the antenna switch-...

  • Page 10: Power Supply Circuits

    4-4 POWER SUPPLY CIRCUITS 4-4-1 VOLTAGE LINES (MAIN unit) CPU (IC1)—continued Description Line Port Description number name The voltage from a DC power supply. Outputs RF attenuator control signal to The same voltage as the VCC line which is con- RFATT the attenuator switch (MAIN unit;...
  • Page 11 4-5-2 I/O expander IC (1) IC5 (MAIN unit) Port Description number name Output tunable band pass filter control 2, 3, 10 T1–T3 signals. Output port for tunable band pass filter control sig- nal whiler receiving. output power control signal while transmitting.
  • Page 12 ↑ / ↓: Cursor Up/Down [Enter] at TXF: REF Set Mode < / > : –/+ ESC : Quit /B: This does not activate for IC-F310/F320’s adjust- ment. RS-232C port number. NOTE: When the EEPROM (FRONT unit; IC3) is replaced or the transceiver displays an error message and beeps, the following operation is necessary before starting the ADJUSTMENT.
  • Page 13 ‘ ‘ PROGRAM SCREEN EXAMPLE ∗∗∗∗∗ Trimmer Control Software for IC–F300 Series ∗∗∗∗∗ Rev. 1.0 Connected DC voltage A/D VIN 177 : B1h 13.88V D/A BP T1 170 : AAh 2.93V Internal temperature D/A BP T2 188 : BCh 3.16V A/D TEMPS 180 : B4h 27.70'C...

  • Page 14: Pll Adjustment

    5-2 PLL ADJUSTMENT ADJUSTMENT MEASUREMENT POINT ADJUSTMENT ADJUSTMENT CONDITION VALUE UNIT LOCATION UNIT ADJUST PLL LOCK • Operating frequency: (Ch 1) MAIN Connect a digital 3.5 V [L-band] MAIN VOLTAGE 155.00000 MHz [L-band] multi-meter or oscil- 4.0 V [H-band] 174.00000 MHz [H-band] loscope •...
  • Page 15 5-3 TRIMMER ADJUSTMENT Select an operation using [↑] / [↓] keys, then set specified value using [←] / [→] keys on the connected computer keyboard. MEASUREMENT ADJUSTMENT ADJUSTMENT CONDITION VALUE UNIT LOCATION REFERENCE • Operating frequency : (Ch 1) Rear Loosely couple a frequency 155.00000 MHz FREQUENCY...
  • Page 16 TRIMMER ADJUSTMENT — continued Select an operation using [↑] / [↓]keys, then set specified value using [←] / [→] keys on the connected computer keyboard. MEASUREMENT ADJUSTMENT ADJUSTMENT CONDITION VALUE UNIT LOCATION RECEIVE • Operating frequency: (Ch 2) Rear Connect a SINAD meter with a 4 Minimum distortion Ω...
  • Page 17 • MAIN unit SINAD DC power supply 13.2 (13.6) V / 15 A meter millivoltmeter Speaker 4 Ω Audio – generator J2, pin 25 Audio input point • FRONT unit Beep level adjustment 5 - 6...

  • Page 18: Front Unit

    SECTION 6 PARTS LIST [FRONT UNIT] [FRONT UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 1140007911 S.IC HD6433875B20H 7030003640 S.RESISTOR ERJ3GEYJ 473 V (47 kΩ) 1110003500 S.IC S-80742SL-A6-T1 7030003680 S.RESISTOR ERJ3GEYJ 104 V (100 kΩ) 1130008670 S.IC 25LC160T-I/SN 7030003680 S.RESISTOR ERJ3GEYJ 104 V (100 kΩ) 7030003730 S.RESISTOR ERJ3GEYJ 274 V (270 kΩ) 7030003740 S.RESISTOR...
  • Page 19 [FRONT UNIT] [FRONT UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 4030006900 S.CERAMIC C1608 JB 1E 103K-T-A 6450001470 CONNECTOR 95003-2881 4030006900 S.CERAMIC C1608 JB 1E 103K-T-A 6510020510 S.CONNECTOR FH12-40S-0.5SV 4030006900 S.CERAMIC C1608 JB 1E 103K-T-A 4030006900 S.CERAMIC C1608 JB 1E 103K-T-A 5030001540 LCD LD-HU10140J only 4030006900 S.CERAMIC...

  • Page 20: Main Unit

    [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION ∏ 1150001930 IC SC-1364 [L-band] 1790001280 S.DIODE MA111 (TX) ∏ 1150001940 IC SC-1365 [H-band] 1160000060 S.DIODE DAN202U T107 1150001760 IC M68702L Ò [L-band] 1790000700 DIODE DSA3A1 1150001750 IC M68702H Ò [H-band] 1790001280 S.DIODE MA111 (TX) 1130007610 S.IC µPD3140GS-E1 (DS8)
  • Page 21 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 7030003470 S.RESISTOR ERJ3GEYJ 182 V (1.8 kΩ) R109 7030003560 S.RESISTOR ERJ3GEYJ 103 V (10 kΩ) ERJ3GEYJ 101 V (100 Ω) 7030003320 S.RESISTOR R110 7030003640 S.RESISTOR ERJ3GEYJ 473 V (47 kΩ) ERJ3GEYJ 151 V (150 Ω) ERJ3GEYJ 101 V (100 Ω) 7030003340 S.RESISTOR R111...
  • Page 22 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION R194 7030003560 S.RESISTOR ERJ3GEYJ 103 V (10 kΩ) 4030011340 S.CERAMIC C1608 CH 1H 471J-T-A R195 7030003560 S.RESISTOR ERJ3GEYJ 103 V (10 kΩ) 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A R196 7030003640 S.RESISTOR ERJ3GEYJ 473 V (47 kΩ) 4030011340 S.CERAMIC C1608 CH 1H 471J-T-A R197...
  • Page 23 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 4030007090 S.CERAMIC C1608 CH 1H 470J-T-A C133 4030008900 S.CERAMIC C1608 JB 1C 333K-T-A 4030007090 S.CERAMIC C1608 CH 1H 470J-T-A C134 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A C135 4030006900 S.CERAMIC C1608 JB 1E 103K-T-A...
  • Page 24 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION C217 4030006900 S.CERAMIC C1608 JB 1E 103K-T-A 6510020510 S.CONNECTOR FH12-40S-0.5SV C218 4030006900 S.CERAMIC C1608 JB 1E 103K-T-A 6510018430 S.CONNECTOR AXN330C038P C219 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A 6510019250 S.CONNECTOR B11B-ZR-SM3-TF C220 4510004510 ELECTROLYTIC 25 MV 470 HC 6510007080 CONNECTOR PI28A-02M...
  • Page 25 SECTION 7 MECHANICAL PARTS [FRONT UNIT] [UNPACKING] REF NO. ORDER NO. DESCRIPTION QTY. REF NO. ORDER NO. DESCRIPTION QTY. 6450001470 Connector 95003-2881 5210000120 Fuse FGB 15A [PMR] 5210000080 Fuse FGB 20A [LMR] 8900007680 Cable OPC-741 Optional product Cable OPC-345 [PMR] 5030001540 LCD LD-HU10140J Optional product...
  • Page 26 MP6 (C) MP1 (M) MP9 (C) EP2 (F) MP5 (M) DS1 (F) SP1 (C) MP2 (F) LCD type only WS1 (C) (IC-F310/F320) MP2 (M) MP3 (C) MP2 (C) MP8 (C) MP7 (C) MP4 (C) MP13 (C) MP7 (C) MP7 (C)
  • Page 27 SECTION 8 SEMI-CONDUCTOR INFORMATION ¡DIODES ¡TRANSISTORS AND FET'S 1SS352 1SS375 DA204U DA221 DAN202U 2SA1588 GR 2SB1124 S 2SB1143 S 2SB1201 S 2SC2714 Y (Symbol: C1) (Symbol: FH) (Symbol: K) (Symbol: K) (Symbol: N) (Symbol: ZG) (Symbol: BG) (Symbol: BG) (Symbol: B1201) (Symbol: QY) HVU17TRF HVU350...
  • Page 28 SECTION 9 BOARD LAYOUTS 9-1 FRONT UNIT (IC-F310/F320) ¡ ¡ TOP VIEW to Microphone 9 - 1...
  • Page 29 ¡ ¡ BOTTOM VIEW to MAIN unit J1 9 - 2...
  • Page 30 9-2 FRONT UNIT (IC-F310S/F320S) ¡ ¡ TOP VIEW to Microphone 9 - 3...
  • Page 31 ¡ ¡ BOTTOM VIEW to MAIN unit J1 9 - 4...
  • Page 32 9-3 MAIN UNIT (IC-F310/IC-F310S) ¡ ¡ TOP VIEW NOTE: L19, 20, 21, 22 should be mounted as the appointed direction. TOP VIEW INDICATION to FRONT unit SPGND to Speaker HORN to Optional cable to Optional unit 9 - 5...
  • Page 33 ¡ ¡ BOTTOM VIEW 9 - 6...
  • Page 34 9-4 MAIN UNIT (IC-F320/F320S) ¡ ¡ TOP VIEW NOTE: L19, 20, 21, 22 should be mounted as the appointed direction. TOP VIEW INDICATION to FRONT unit SPGND to Speaker HORN to Optional cable to Optional unit 9 - 7...
  • Page 35 ¡ ¡ BOTTOM VIEW 9 - 8...
  • Page 36 SECTION 10 BLOCK DIAGRAM RIPPLE x1 or x2 LOOP TX/RX DRIVE BUFF BUFF BUFF BUFF C60.C61 Q7.Q8 D5.D6 D3.D4 COMMON LINE L1.L2.L3 D7.D8 D13.D14 L17.L18 LINE DISC PLST RX LINE DTCS UNLK BUFF 2nd Lo TX LINE MAIN UNIT CTRL L23.L24 FM DET 1st LO...
  • Page 37 SECTION 11 VOLTAGE DIAGRAM ¡ ¡ FRONT UNIT LED type only (LED type only) Connect to IC1(pin 69 pin 75) DS12 LCD type only LD-HU10140J SEG1 (LCD type only) SEG1 SEG2 FRONT UNIT SEG2 DS13 SEG3 (LCD type only) SEG3 SEG4 MEASUREMENT CONDITIONS SEG4...
  • Page 38 • MAIN UNIT 0.12µH (PMR,L-BAND) 0.15µH (PMR,H-BAND) R242 LVIN 0.1µH (LMR) R232 2SC4081 15.3MHz 470k 2SD1664 CR-575 10nH (LMR,H-band only) 2SK880 47nH (Others) R233 R44 10 SC-1364 (PMR,L-band) VCC1 GND1 SC-1365 (PMR,H-band) MC152-E558CN PLST M68702L (LMR,L-band) VCC2 2.7µH -100024 M68702H (LMR,H-band 18p (L-band) 2SC4226 DATA...
  • Page 39 0.12µH (PMR,L-BAND) MAIN UNIT 0.15µH (PMR,H-BAND) R242 0.1µH (LMR) LW-25 2SD1664 10nH (LMR,H-band only) 47nH (Others) 1k (PMR) 100 (LMR,H-band) 10p (PMR L-band) 330 (LMR,L-band) 9p (PMR L-band) 8p (LMR) SC-1364 (PMR,L-band) SC-1365 (PMR,H-band) M68702L (LMR,L-band) M68702H (LMR,H-band) MI407 0.001 LA243 LA253 18p (L-band)
  • Page 40 ¥ MAIN UNIT 0.12µH (PMR,L-BAND) MAIN UNIT 0.15µH (PMR,H-BAND) R242 LVIN 0.1µH (LMR) R232 2SC4081 15.3MHz 470k LW-25 CR-575 2SD1664 10nH (LMR,H-band only) 2SK880 47nH (Others) 1k (PMR) R233 100 (LMR,H-band) 10p (PMR L-band) 330 (LMR,L-band) 9p (PMR L-band) R44 10 8p (LMR) SC-1364 (PMR,L-band) VCC1...
  • Page 41 Icom (UK) Ltd. : http://www.icomcanada.com Unit 9, Sea St., Herne Bay, Kent, CT6 8LD, U.K. Phone : 01227 741741 Fax : 01227 741742 Icom (Australia) Pty. Ltd. : http://www.icomuk.co.uk A.B.N. 88 006 092 575 Icom France S.a 290-294 Albert Street, Brunswick, Victoria, 3056, Australia...
  • Page 42 A-5560SZ-SV-q © 1999 Icom Inc. 1-1-32, Kamiminami, Hirano-ku Osaka 547-0003, Japan...

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