Icom IC-F30GT Service Manual
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Icom IC-F30GT Service Manual

Icom vhf transceiver service manual
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VHF TRANSCEIVER
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Summary of Contents for Icom IC-F30GT

  • Page 1 VHF TRANSCEIVER iC-f30gt iC-f30gs iC-f3 1 gt iC-f3 1 gs...
  • Page 2 This could damage the transceiver’s front end. INTRINSICALLY SAFE QUALIFICATION When servicing intrinsically safe versions of the IC-F30GT/GS and IC-F31GT/GS the following conditions must be met. Failing to satisfy any of these conditions will invalidate the INTRINSICALLY SAFE certification.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS SECTION 1 SPECIFICATIONS SECTION 2 INSIDE VIEWS SECTION 3 DISASSEMBLY INSTRUCTIONS SECTION 4 CIRCUIT DESCRIPTION 4 - 1 RECEIVER CIRCUITS ....................4 - 1 4 - 2 TRANSMITTER CIRCUITS .................... 4 - 2 4 - 3 PLL CIRCUITS ....................... 4 - 3 4 - 4 FFSK CIRCUITS ......................
  • Page 4 SECTION 1 SPECIFICATIONS USA/GEN Measurement method EIA-152-C/204D or TIA-603 ETS 300 086 (GEN) Frequency coverage 136.000–174.000 MHz 16K0F3E [25 kHz; Wide], 8K50F3E [12.5 kHz; Narrow] Type of emission 14K0F3E [20 kHz; Moddle], 8K50F3E [12.5 kHz; Narrow] × Number of conventional channels Max.
  • Page 5 SECTION 2 INSIDE VIEWS • MAIN UNIT Top view Antenna switching D/A converter (D1, D25, D24: MA77 (IC27: M62334FP) D1 is bottom side) • FRONT UNIT Bottom view Power amplifier 2nd IF filter (450 kHz) (Q1: 2SK2974) (FI2: SFPCA450KE4A) Internal speaker switch circuit Pre-drive amplifier (FI3: SFPCA450KG1A) (Q6, Q7: CPH3403, Q8: 2SC4081,...
  • Page 6 , and unscrew 1 nut (2 × w Unscrew 1 screw w Unscrew 2 nuts (ICOM screw), and 2 screws (2 × 4 mm, silver), and 2 screws e Unscrew 6 screws 4 mm, black) from the 9-pin connector. (2 × 8 mm, silver) from the chassis.

  • Page 7: Circuit Description

    SECTION 4 CIRCUIT DESCRIPTION 4-1 RECEIVER CIRCUITS The RF signals from the bandpass filter are mixed with the 1st LO signals, where come from the RX VCO circuit via the 4-1-1 ANTENNA SWITCHING CIRCUIT attenuator (R360–R358), at the 1st mixer circuit (Q19) to The antenna switching circuit functions as a low-pass filter produce a 31.65 MHz 1st IF signal.

  • Page 8: Transmitter Circuits

    4-1-5 AF AMPLIFIER CIRCUIT 4-2 TRANSMITTER CIRCUITS The AF amplifier circuit amplifies the demodulated AF sig- 4-2-1 MICROPHONE AMPLIFIER CIRCUIT nals to drive a speaker. The microphone amplifier circuit amplifies audio signals within +6 dB/octave pre-emphasis characteristics from the The AF signals from the FM IF IC (IC3, pin 9) are amplified microphone to a level needed for the modulation circuit.

  • Page 9: Pll Circuits

    4-2-4 APC CIRCUIT 4-3 PLL CIRCUITS The APC circuit (IC4, Q22) protects the drive and power 4-3-1 PLL CIRCUIT amplifiers from excessive current drive, and selects output A PLL circuit provides stable oscillation of the transmit fre- power of HIGH, LOW2 or LOW1. quency and receive 1st LO frequency.

  • Page 10: Ffsk Circuits

    4-4 FFSK CIRCUIT DESCRIPTION In case of the FFSK signal is used for the PM modulation, the FM/PM switch (IC29) is changed to pin 3. 4-4-1 GENERAL IC9 is the compounder IC which is controlled by serial data In case of the FFSK signal is used for the FM modulation, bus line (“TRD”, “MSKE”, “DIN”, “SCK”, “APST”, “REGS1”, the FM/PM switch (IC29) is changed to pin 5.

  • Page 11: Power Supply Circuits

    4-5 POWER SUPPLY CIRCUIT Port Description number name VOLTAGE LINE Outputs data signals for the PLL IC LINE DESCRIPTION (IC1), compamder IC (IC9), expander The voltage from the attached battery pack. IC (IC23), D/A converter (IC13), etc. Outputs strobe signals to the D/A con- The same voltage as the HV line (battery volt- DAST verter (IC13).

  • Page 12: Adjustment Procedures

    Follow the prompts. y Program group ‘CS-F30G ADJ’ appears in the ‘Programs’ folder of the [Start] menu. I STARTING SOFTWARE ADJUSTMENT q Connect IC-F30GT, F30GS, F31GT or F31GS and PC with *OPC-966 JIG CABLE w Turn the transceiver power ON.
  • Page 13 • Screen display exampe CS-F30G ADJ Rev.1.0 File Option COM 1: OPEN Connect Reload (F5) Disp para [A / D] [D / A] : 197 : C5h : 7.73 V BPF T1 : 90 : 5Ah : 1.76 V TEMPS : 190 : BEh : 32.23 'C BPF T2 : 45 : 2Dh : 0.88 V...
  • Page 14 • Connection Standard signal generator to the antenna connector 0.1 µV to 32 mV (–127 dBm to –17 dBm) Attenuator deviation meter 40 dB or 50 dB CAUTION: DO NOT transmit while RF power meter 0.1–10 W/50 Ω SSG is connected to the antenna connector.

  • Page 15: Pll Adjustment

    5-2 PLL ADJUSTMENT MEASUREMENT ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITIONS VALUE UNIT LOCATION UNIT ADJUST PLL LOCK • Operating freq. : 136.000 MHz MAIN Connect a digital multi- 1.2 V MAIN C372 VOLTAGE • Receiving meter or an oscillo- scope to the check point, “LV”.

  • Page 16: Software Adjustment

    5-3 SOFTWARE 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 freq. : 174.000 MHz Loosely couple a frequnecy 174.0000 MHz FREQUENCY •...
  • Page 17 SOFTWARE 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 • Operating freq. : 136.000 MHz MAIN Connect a SINAD meter with an Minimum distortion 8 Ω...

  • Page 18: Parts List

    26FLZ-SM1-TB 6510022200 S.CONNECTOR 40FLZ-SM1-R-TB M.=Mounted side (T: Mounted on the Top side, B: Mounted on the Bottom side) [GT]: IC-F30GT/F31GT, [GS]: IC-F30GS/F31GS, *=safety critical components S.=Surface mount [F30G]: IC-F30GT/F30GS, [F31G]: IC-F31GT/F31GS [IS]: Intrinsically safe version, [BIIS]: BIIS version 6 - 1...

  • Page 19: Main Unit

    7030007570 S.RESISTOR ERJ2GEJ 122X (1.2 kΩ) M.=Mounted side (T: Mounted on the Top side, B: Mounted on the Bottom side) [GT]: IC-F30GT/F31GT, [GS]: IC-F30GS/F31GS, S.=Surface mount [F30G]: IC-F30GT/F30GS, [F31G]: IC-F31GT/F31GS [IS]: Intrinsically safe version, [BIIS]: BIIS version 6 - 2...
  • Page 20 7030005060 S.RESISTOR ERJ2GEJ 333 X (33 kΩ) M.=Mounted side (T: Mounted on the Top side, B: Mounted on the Bottom side) [GT]: IC-F30GT/F31GT, [GS]: IC-F30GS/F31GS, *=safety critical components S.=Surface mount [F30G]: IC-F30GT/F30GS, [F31G]: IC-F31GT/F31GS [IS]: Intrinsically safe version, [BIIS]: BIIS version...
  • Page 21 ERJ2GEJ 102 X (1 kΩ) 4030014220 S.CERAMIC ECUE1E471KBQ M.=Mounted side (T: Mounted on the Top side, B: Mounted on the Bottom side) [GT]: IC-F30GT/F31GT, [GS]: IC-F30GS/F31GS, *=safety critical components S.=Surface mount [F30G]: IC-F30GT/F30GS, [F31G]: IC-F31GT/F31GS [IS]: Intrinsically safe version, [BIIS]: BIIS version...
  • Page 22 C268 4030016930 S.CERAMIC ECJ0EB1A104K M.=Mounted side (T: Mounted on the Top side, B: Mounted on the Bottom side) [GT]: IC-F30GT/F31GT, [GS]: IC-F30GS/F31GS, *=safety critical components S.=Surface mount [F30G]: IC-F30GT/F30GS, [F31G]: IC-F31GT/F31GS [IS]: Intrinsically safe version, [BIIS]: BIIS version 6 - 5...
  • Page 23 [BIIS] 6510018430 S.CONNECTOR AXN330C038P M.=Mounted side (T: Mounted on the Top side, B: Mounted on the Bottom side) [GT]: IC-F30GT/F31GT, [GS]: IC-F30GS/F31GS, *=safety critical components S.=Surface mount [F30G]: IC-F30GT/F30GS, [F31G]: IC-F31GT/F31GS [IS]: Intrinsically safe version, [BIIS]: BIIS version 6 - 6...
  • Page 24 7030003860 S.RESISTOR ERJ3GE JPW V 8900009790 CABLE OPC-972 0910055243 B 5511C [GT]: IC-F30GT/F31GT, M.=Mounted side (T: Mounted on the Top side, [GS]: IC-F30GS/F31GS, B: Mounted on the Bottom side) *=safety critical components [F30G]: IC-F30GT/F30GS, S.=Surface mount [F31G]: IC-F31GT/F31GS [IS]: Intrinsically safe version...
  • Page 25 8930053630 Seal O-ring (AH) 8210017071 2337 C-panel-1 MP54 8930053680 Spring (AG) 8810003700 ICOM screw B4 Screw PH No.0 M2 × 6 ZK MP55 8810004890 Screw PH No.0 M2 × 3 ZK MP56 8810005360 * : Safety critical components Screw PH BT M2 × 6 ZK...
  • Page 26 MP40 (C) W1 (F) MP2 (F) MP40 (C) MP5 (C) MP51 (C) MP19 (C) MP26 (C) SP1 (F) MP9 (C) MP20 (C) DS10 (F) MP57 (C) MP65 (C) N I T MP54 (C) MP55 (C) MP40 (C) MP8 (C) MP17 (C) MP3 (F) MP44 (C) MP50 (C)
  • Page 27 SECTION SECTION 8 PARTS LIST SEMI-CONDUCTOR INFORMATION 8 - 1 TRANSISTORS AND FETS NAME SYMBOL INSIDE VIEW NAME SYMBOL INSIDE VIEW NAME SYMBOL INSIDE VIEW NAME SYMBOL INSIDE VIEW 3SK206-T1 U78 2SA1362 GR XP6501 AB MA713 3SK293 2SB1132 R BARB CPH3403-TL MA742 8 - 2 DIODES...
  • Page 28 SECTION 9 BOARD LAYOUTS 9 - 1 FRONT UNIT • TOP VIEW The combination of this page and the next page shows the unit layout in the same configuration as the actual MICROPHONE P.C. Board. ✽ 9 - 1...
  • Page 29 FRONT UNIT • BOTTOM VIEW The combination of this page and the previous page shows the unit layout in the same configuration as the actual P.C. Board. VOUT VEE3 VEE2 CAP+ CAP– PMODE OSC1 OSC0 RESB VS/TE SPEAKER to MAIN unit J3 9 - 2...
  • Page 30 9 - 2 MAIN UNIT • TOP VIEW OPC-966 EM-80 The combination of this page and the next page shows EM-89 the unit layout in the same configuration as the actual AD-52 P.C. Board. HS-93 UNIVERSAL CONNECTOR to FRONT unit J1 BATTERY INT SP SW BDET...
  • Page 31 MAIN UNIT The combination of this page and the previous page • BOTTOM VIEW shows the unit layout in the same configuration as the actual P.C. Board. INT SP SW AF VR POWER SW R193 4 5 6 SELECT 9 - 4...

  • Page 32: Disassembly Information

    SECTION 10 BC-137 OPTIONAL DESKTOP CHARGER INFORMASION 10-1 PARTS LIST 10-2 DISASSEMBLY INFORMATION [MAIN UNIT] REF. NO. ODER NO. DESCRIPTION QTY. 1520000650 S.TRANSISTOR 2SB1201-S-TL MP3 (C) 1590000480 S.TRANSISTOR RN2402 (TE85R) 1590000510 S.TRANSISTOR RN1409 (TE85R) 1530001950 S.TRANSISTOR 2SC2712-GR (TE85R) 1750000550 S.DIODE 1SS355 TE-17 1750000020 S.DIODE 1SS184 (TE85R)

  • Page 33: Voltage Diagram

    10-3 VOLTAGE DIAGRAM 12.49 V 12.47 V 13.80 V R1 24 R5 10 k 8.01 V 7.98 V 7.20 V D2 1SS184 2SB1201 S R2 24 CHARGE+ 11.82 V 11.80 V 13.63 V 12.46 V RN2404 TEMP DS1 TLG124A R4 10 k 0.23 V 1SS355 0.22 V...
  • Page 34 SECTION 11 BLOCK DIAGRAM DTC144EU XP6501 XP1214 MAIN UNIT RIPPLE VCOS FILTER 2SK880 136-174 MHz Q11: 2SC4226 BUFF LVIN D6, D40–D42: HVC350B D1, D24, D25 D4, D5: MA77 TC75S51F CR-667 SA7025 2SC4215 2SC4226 2SK2973 2SK2974 MA713 MA77 RX VCO 2SC4215 DRIVE LOOP TX/RX...
  • Page 35 [GS]: IC-F30GS/F31GS R206 100 TX LINE R207 C252 R275 R274 180k C251 470p 270p R210 390k RXDT 470k [F30G]: IC-F30GT/ IC-F30GS C348 100k RX LINE 470k C248 C249 C351 RX: 0V CPH3403 0.018 0.018 [F31G]: IC-F31GT/ IC-F31GS C352 TX : 2.2V...
  • Page 36 R.FIL [F30G]: IC-F30GT/ IC-F30GS Note [GT]: IC-F30GT/F31GT Explanatory notes MAIN UNIT RX VCO +B LINE TX LINE [GS]: IC-F30GS/F31GS [F31G]: IC-F31GT/ IC-F31GS XP6501 1.8 µH ANT FILTER COMMON LINE RX LINE 3.9k 1.8k 2SC4226 RX: 0V TX: 4.8V 80nH HVC350...
  • Page 37 Unit 9, Sea St., Herne Bay, Kent, CT6 8LD, U.K. Phone : +44 (01227) 741741 Fax : +44 (01227) 741742 : http://www.icomuk.co.uk Icom (Australia) Pty. Ltd. E-mail : info@icomuk.co.uk A.B.N. 88 006 092 575 290-294 Albert Street, Brunswick, Victoria, 3056, Australia Icom France S.a...
  • Page 38 S-13805MZ-C1-3 1-1-32, Kamiminami, Hirano-ku, Osaka 547-0003, Japan C 2001-2003 Icom Inc.

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