Icom IC-F31GS Servise Manual
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Icom IC-F31GS Servise Manual

Icom IC-F31GS Servise Manual

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VHF TRANSCEIVER
iC-f30gt
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  • Page 1 VHF TRANSCEIVER iC-f30gt iC-f30gs iC-f3 1 gt iC-f3 1 gs...
  • Page 2 1. Servicing the transcever should only be undertaken by suitably qualified personnel in a non-hazardous area. Never attempt to remove the case in a hazardous area. 2. ONLY the approved battery, ICOM’s BP-210FM may be used. 3. USE ONLY safety critical components as specified in the parts list (SECTION 6), should replacement of any item be necessary.

  • 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 POWER SUPPLY 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 Type of emission 16K0F3E [25 kHz; Wide], 8K50F3E [12.5 kHz; Narrow] × Number of conventional channels Max. 256 ch (16 channels 16 banks) Power supply requirement 7.2 V DC (negative ground;...
  • 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 A portion of the AF signals from the FM IF IC (IC3, pin 9) passes through the low-pass filter (IC20b/a) to remove AF The AF amplifier circuit amplifies the demodulated AF sig- (voice) signals and is applied to the CTCSS or DTCS nals to drive a speaker.

  • Page 9: Pll Circuits

    4-2-3 DRIVE/POWER AMPLIFIER CIRCUITS 4-3 PLL CIRCUITS The drive/power amplifier circuits amplify the VCO oscillat- 4-3-1 PLL CIRCUIT ing signal to an output power level. A PLL circuit provides stable oscillation of the transmit fre- quency and receive 1st LO frequency. The PLL output com- The signal from the VCO circuit passes through the T/R pares the phase of the divided VCO frequency to the refer- switch (D4), and is amplified at the YGR (Q3), drive (Q2),...

  • Page 10: Power Supply Circuits

    4-4 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 11: Adjustment Procedures

    SECTION 5 ADJUSTMENT PROCEDURES 5-1 PREPARATION When you adjust the contents on pages 5-5 and 5-6, SOFTWARE ADJUSTMENT, the optional CS-F30G ADJ ADJUSTMENT SOFT- (Rev. 1.0 or later), *OPC-966 (modified OPC-966 ) are required. WARE JIG CABLE CLONING CABLE I REQUIRED TEST EQUIPMENT EQUIPMENT GRADE AND RANGE EQUIPMENT...
  • Page 12 • 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 13 • 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 14: 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 15: 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 16 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 17: Parts List

    SECTION 6 PARTS LIST [FRONT UNIT] [FRONT UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 1130009860 S.IC TC74VHC373FT (EL) 6510022360 S.CONNECTOR 26FLZ-SM1-TB 1110002750 S.IC TA75S01F (TE85R) 6510022200 S.CONNECTOR 40FLZ-SM1-R-TB 1530002850 S.TRANSISTOR 2SC4116-BL (TE85R) 5010000160 S.LED LNJ310M6URA 1530002850 S.TRANSISTOR 2SC4116-BL (TE85R) 5010000160 S.LED LNJ310M6URA 1590002150 S.TRANSISTOR DTC144TE TL 5010000160 S.LED...

  • Page 18: Main Unit

    [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 1130009130 S.IC SA7025DK-T 1790000620 S.DIODE MA77 (TX) 1130008560 S.IC TC75S51F (TE85L) 1790001250 S.DIODE MA2S111-(TX) 1110003490 S.IC TA31136FN (D, EL) 1790000620 S.DIODE MA77 (TX) 1130008560 S.IC TC75S51F (TE85L) 1790001250 S.DIODE MA2S111-(TX) 1110001810 S.IC TA7368F (TP1) 1730002360 S.ZENER MA8062-M (TX)
  • Page 19 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 7030003670 S.RESISTOR ERJ3GEYJ 823 V (82 kΩ) 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) MCR10EZHJ 150 Ω (151) 7030000280 S.RESISTOR 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) 7030003480 S.RESISTOR ERJ3GEYJ 222 V (2.2 kΩ) 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) 7030003480 S.RESISTOR...
  • Page 20 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION R195 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ) R288 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) R196 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) R289 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) R197 7030005040 S.RESISTOR ERJ2GEJ 472 X (4.7 kΩ)
  • Page 21 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 4030014220 S.CERAMIC ECUE1E471KBQ C113 4030016790 S.CERAMIC ECJ0EB1C103K 4030013850 S.CERAMIC ECUE1E102KBQ C114 4030016930 S.CERAMIC ECJ0EB1A104K C23* 4550006660 S.TANTALUM ECST1CC226R C115 4030013850 S.CERAMIC ECUE1E102KBQ 4030014220 S.CERAMIC ECUE1E471KBQ C116 4030014220 S.CERAMIC ECUE1E471KBQ 4030013850 S.CERAMIC ECUE1E102KBQ C117 4030013850 S.CERAMIC ECUE1E102KBQ...
  • Page 22 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION C213* 4550006320 S.TANTALUM ECST0JY475R C306 4030016930 S.CERAMIC ECJ0EB1A104K C214 4550006360 S.TANTALUM ECST1VY104R C307 4030014180 S.CERAMIC ECUE1H470JCQ C215 4030016930 S.CERAMIC ECJ0EB1A104K C308 4030014180 S.CERAMIC ECUE1H470JCQ C216 4030016950 S.CERAMIC ECJ0EB1A473K C309 4030014180 S.CERAMIC ECUE1H470JCQ C217 4030016930 S.CERAMIC ECJ0EB1A104K...
  • Page 23 [MAIN UNIT] ORDER DESCRIPTION C399 4030016760 S.CERAMIC ECUE1E472KBQ C400 4030013850 S.CERAMIC ECUE1E102KBQ C401 4030014180 S.CERAMIC ECUE1H470JCQ C402* 4550006950 S.TANTALUM ECST0JX476R C403 4030006860 S.CERAMIC C1608 JB 1H 102K-T C404 4030014180 S.CERAMIC ECUE1H470JCQ C405 4030014180 S.CERAMIC ECUE1H470JCQ C406 4030013940 S.CERAMIC C1005 JB 1E 223K-T-N C407 4030016930 S.CERAMIC ECJ0EB1A104K...
  • Page 24 Spring (AG) 8210017071 2337 C-panel-1 Screw PH No.0 M2 × 6 ZK MP55 8810004890 8810003700 ICOM screw B4 Screw PH No.0 M2 × 3 ZK MP56 8810005360 Screw PH BT M2 × 6 ZK MP57 8810009560 * : Safety critical components Screw PH No.0 M2 ×...
  • Page 25 MP18 (C) MP41 (C) MC1 (F) MP56 (C) MP43 (C) MP58 (C) MP13 (C) MP35 (C) MP2 (C) MP56 (C) IC-F30GS and IC-F31GS MP61 (C) MP63 (C) MP64 (C) CHANNEL SW MP56 (C) MP49 (C) MP29 (C) MP56 (C) MP1 (C)
  • Page 26 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 27 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. ✽ Surface Inside 1 Inside 2 Under side 9 - 1...
  • Page 28 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 Surface Inside 1 Inside 2 Under side SPEAKER...
  • Page 29 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 30 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 Surface Inside-1 Inside-2 Under side...

  • Page 31: Block Diagram

    SECTION 10 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 LOOP DRIVE TX/RX...
  • Page 32 BUSY 15.6 MHz 970 mVp-p SIG1 100k OPT11 OPT12 C427 OPT13 R341 C105 R52 100 C100 SECTION 11 VOLTAGE DIAGRAM 0.001 R294 47k OPV11 APST 0.001 R295 47k OPV12 C104 C430 CR-667 2SK880Y 0.001 OPV13 RGS1 15.600 MHz C106 C102 R296 0.0047 C103...
  • Page 33 Hz 970 mVp-p R.FIL [F30G]: IC-F30GT/ IC-F30GS Note [GT]: IC-F30GT/F31GT RX VCO [GS]: IC-F30GS/F31GS [F31G]: IC-F31GT/ IC-F31GS XP6501 ANT FILTER C100 1.8 H 3.9k 0.001 1.8k 2SC4226 RX: 0V C430 80nH TX: 4.8V 2SK880Y 0.001 HVC350 HVC350 0.001 50nH 44nH 32nH 0.01...
  • Page 34 BUSY 15.6 MHz 970 mVp-p Note [GT]: IC-F30GT/F31GT [F30G]: IC-F30GT/ IC-F30GS SIG1 SECTION 11 VOLTAGE DIAGRAM RX VCO 100k OPT11 [GS]: IC-F30GS/F31GS [F31G]: IC-F31GT/ IC-F31GS OPT12 XP6501 OPT13 C427 R341 C105 R52 100 C100 1.8 µH ANT FILTER 0.001 R294 47k...
  • Page 35 1-1-32, Kamiminami, Hirano-ku, Osaka 547-0003, Japan Phone : 06 6793 5302 : 06 6793 0013 : http://www.icom.co.jp/world/index.html < > Corporate Headquarters Communication Equipment 2380 116th Avenue N.E., Bellevue, WA 98004, U.S.A. Himmelgeister Str. 100, D-40225 Düsseldorf, Germany Phone : ( 425 ) 454-8155...
  • Page 36 S-13805MZ-C1-w 1-1-32, Kamiminami, Hirano-ku, Osaka 547-0003, Japan © 2001 Icom Inc.

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