Icom IC-F41GS Servise Manual
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Icom IC-F41GS Servise Manual

Icom IC-F41GS Servise Manual

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UHF TRANSCEIVER
iC-f40gt
iC-f40gs
iC-f4 1 gt
iC-f4 1 gs
( including MT version )

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Summary of Contents for Icom IC-F41GS

  • Page 1 UHF TRANSCEIVER iC-f40gt iC-f40gs iC-f4 1 gt iC-f4 1 gs ( including MT version )
  • 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

    EXPLICIT DEFINITIONS FREQUENCY COVERAGE CHANNEL SPACING Wide/Narrow-type 25 kHz/12.5 kHz L-band 400–430 MHz ML-band 440–480 MHz Middle/Narrow-type 20 kHz/12.5 kHz M-band MH-band 450–490 MHz H1-band 480–512 MHz H-band H2-band 480–520 MHz TABLE OF CONTENTS SECTION 1 SPECIFICATIONS SECTION 2 INSIDE VIEWS SECTION 3 DISASSEMBLY INSTRUCTIONS SECTION 4...
  • Page 4 SECTION 1 SPECIFICATIONS USA/GEN Measurement method EIA-152-C/204D or TIA-603 ETS 300 086 (GEN) [L-band] : 400.000–430.000 MHz [ML-band] : 440.000–480.000 MHz [GEN]/[EUR] Frequency coverage [MH-band] : 450.000–490.000 MHz [USA]/[GEN] [H-band] : 480.000–512.000 MHz [USA], 480.000–520.000 MHz [GEN] Type of emission 16K0F3E [25 kHz;...

  • Page 5: Inside Views

    SECTION 2 INSIDE VIEWS • MAIN UNIT Top view Antenna switching D/A converter (D25, D24: MA77) (IC27: M62334) (D1: 1SV307) • FRONT UNIT Power detector (D2, D3: RB706F) APC amplifier Bottom view Power amplifier (IC4: TC75S51F) (Q1: 2SK2974) 2nd IF filter (450 kHz Internal speaker switch circuit Pre-drive amplifier (FI2: SFPCA450KE4A)
  • Page 6 (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 (R108–R106), at the 1st mixer circuit (Q19) to The antenna switching circuit functions as a low-pass filter produce a 47.25 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 Circuit

    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 (Q5, Q3), drive...

  • Page 10: Power Supply Circuits

    4-4 POWER SUPPLY CIRCUIT PORT DESCRIPTION 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 5-1-1 CONVENTIONAL VERSION When you adjust the contents on pages 5-7 to 5-9, 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...
  • Page 12 • Screen display exampe (for conventional version) 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...
  • Page 13 5-1-2 MPT VERSION When you adjust the contents on pages 5-7 to 5-9 SOFTWARE ADJUSTMENT, the optional CS-F40G ADJ ADJUSTMENT SOFT- (Rev. 1.0 or later), *OPC-966 (modified OPC-966 ) are required. And all adjustments in this sec- WARE JIG CABLE CLONING CABLE tion must be performed at conventional mode.
  • Page 14 • Screen display exampe (for MPT version) CS-F40G 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...
  • Page 15 • Connection (common) 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 16: Pll Adjustment

    5-2 PLL ADJUSTMENT MEASUREMENT ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITIONS VALUE UNIT LOCATION UNIT ADJUST PLL LOCK • Operating freq. : 400.000 MHz MAIN Connect a digital multi- 1.3 V MAIN C372 VOLTAGE 440.000 MHz [ML] meter or an oscillo- 450.000 MHz [MH] scope to the check 480.000 MHz point, “CP7”.

  • Page 17: 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. : 430.000 MHz Loosely couple a frequnecy 430.0000 MHz [L] FREQUENCY 480.000 MHz...
  • Page 18 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 CTCSS/DTCS • Operating freq. : 400.000 MHz Connect an FM deviation meter 0.70 kHz [Wide] DEVIATON...
  • Page 19 SOFTWARE ADJUSTMENT – continued Select an operation using [↑] / [↓] keys, then set specified value using [←] / [→] keys on the connected computer keyboard. “S-METER (or RSSI L0/L2—[MPT])” adjustment must be performued after “RX SENSITIVITY” adjustment (at page 5-8) is finished. MEASUREMENT ADJUSTMENT ADJUSTMENT CONDITION...

  • Page 20: 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 21 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 1130009130 S.IC SA7025DK-T 1160000050 S.DIODE DAP202U T106 1130008560 S.IC TC75S51F (TE85L) 1160000060 S.DIODE DAN202U T106 1110003490 S.IC TA31136FN (D, EL) 1160000060 S.DIODE DAN202U T106 1130008560 S.IC TC75S51F (TE85L) 1790001210 S.DIODE 1SS375-TL 1110001810 S.IC TA7368F (TP1) 1750000720 S.VARICAP HVC375BTRF...
  • Page 22 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 6200009220 S.COIL LQW18AN15NG00D 7030005220 S.RESISTOR ERJ2GEJ 223 X (22 kΩ) 6200003590 S.COIL EXCCL3225U1 7030009700 S.RESISTOR ERJ2GEJ 202 X (2 kΩ) 6200004950 S.COIL NL 252018T-1R8J 7410000950 S.ARRAY EXB-V8V 102JV 6200002860 S.COIL NL 252018T-4R7J 7030009700 S.RESISTOR ERJ2GEJ 202 X (2 kΩ) 6200001980 S.COIL...
  • Page 23 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION R151 7030005100 S.RESISTOR ERJ2GEJ 154 X (150 kΩ) R245 7410000770 S.ARRAY EXB-V4V 102JV (1 kΩ) R152 7030005310 S.RESISTOR ERJ2GEJ 124 X (120 kΩ) R246 7410000950 S.ARRAY EXB-V8V 102JV ERJ2GEJ 4R7 X (4.7 Ω) R153 7030009320 S.RESISTOR R247...
  • Page 24 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION R357 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) 4030014220 S.CERAMIC ECUE1E471KBQ R358 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) 4030014130 S.CERAMIC ECUE1H120JCQ [F40G] R359 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) 4030014080 S.CERAMIC ECUE1H050BCQ [L]-F41G R360...
  • Page 25 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION C118 4030013850 S.CERAMIC ECUE1E102KBQ C174 4030014180 S.CERAMIC ECUE1H470JCQ C121 4030016930 S.CERAMIC ECJ0EB1A104K C175 4030017040 S.CERAMIC ECJ0EB1A333K [F40G] C123 4030014200 S.CERAMIC ECUE1H101JCQ 4030009820 S.CERAMIC C1005 JB 1E 103K-T-A [L]-F41G C124* 4550006700 S.TANTALUM ECST1AY106R C176 4030013850 S.CERAMIC ECUE1E102KBQ...
  • Page 26 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION C275 4030014180 S.CERAMIC ECUE1H470JCQ C366 4030014180 S.CERAMIC ECUE1H470JCQ C276 4030014150 S.CERAMIC ECUE1H220JCQ C367 4030014180 S.CERAMIC ECUE1H470JCQ C277 4030014100 S.CERAMIC ECUE1H070CCQ C369 4030014130 S.CERAMIC ECUE1H120JCQ C278 4030009820 S.CERAMIC C1005 JB 1E 103K-T-A C371 4030014180 S.CERAMIC ECUE1H470JCQ C279...
  • Page 27 [MAIN UNIT] ORDER DESCRIPTION C451 4030016930 S.CERAMIC ECJ0EB1A104K C452 4030016930 S.CERAMIC ECJ0EB1A104K C453 4030014140 S.CERAMIC ECUE1H150JCQ C454 4030014240 S.CERAMIC ECUE1H180JCQ C455 4030016930 S.CERAMIC ECJ0EB1A104K C456 4030016930 S.CERAMIC ECJ0EB1A104K C457 4030014070 S.CERAMIC ECUE1H040BCQ C458 4030014200 S.CERAMIC ECUE1H101JCQ C459 4030014180 S.CERAMIC ECUE1H470JCQ [F41G] only C460 4030014130 S.CERAMIC...
  • Page 28 Optional product 1922 belt clip-1 MP64 8930051781 Insulation sheet GA-1 8210017071 2337 C-panel-1 MP65 8930053890 2337 T-K sheet 8810003700 ICOM screw B4 MP66 8930054230 2337 main plate [F41G] only MP67 8930023660 Sponge (CU) [H-band] only * : Safety critical components...
  • Page 29 MP56 (C) MP35 (C) MP33 (C) MP13 (C) MP2 (C) MP32 (C) MP43 (C) MP18 (C) MP58 (C) IC-F40GS and IC-F41GS parts MP61 (C) MP63 (C) MP8 (M) MP64 (C) CHANNEL SW MP56 (C) MP49 (C) MP29 (C) MP56 (C)
  • Page 30 SECTION SECTION 8 PARTS LIST SEMI-CONDUCTOR INFORMATION 8 - 1 TRANSISTORS AND FETS 8 - 2 DIODES NAME SYMBOL INSIDE VIEW NAME SYMBOL INSIDE VIEW NAME SYMBOL INSIDE VIEW NAME SYMBOL INSIDE VIEW 3SK206-T1 U78 1SS355 2SA1362 GR MA77 3SK293 1SV307 CPH3403-TL 1SS375...
  • Page 31 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 P.C. Board. MICROPHONE ✽ Surface Inside 1 Inside 2 Under side 9 - 1...
  • Page 32 FRONT 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. VOUT VEE3 VEE2 CAP+ CAP– PMODE OSC1 OSC0 RESB VS/TE Surface Inside 1 Inside 2 Under side SPEAKER...

  • Page 33: F40G Main Unit

    9 - 2 F40G MAIN UNIT • TOP VIEW OPC-966 The combination of this page and the next page shows EM-80 the unit layout in the same configuration as the actual AD-52 HS-93 P.C. Board. UNIVERSAL CONNECTOR to FRONT unit J1 INT SP SW AF VR POWER SW...

  • Page 34: F40G Main Unit

    The combination of this page and the previous page shows the unit layout in the same configuration as the F40G (MAIN unit) actual P.C. Board. • BOTTOM VIEW INT SP SW AF VR POWER SW R193 4 5 6 SELECT Surface Inside-1 Inside-2...

  • Page 35: F41G Main Unit

    9 - 3 F41G MAIN UNIT • TOP VIEW OPC-966 The combination of this page and the next page shows EM-80 AD-52 the unit layout in the same configuration as the actual HS-93 P.C. Board. UNIVERSAL CONNECTOR to FRONT unit J1 INT SP SW AF VR POWER SW...

  • Page 36: F41G Main Unit

    The combination of this page and the previous page shows the unit layout in the same configuration as the F41G (MAIN unit) actual P.C. Board. • BOTTOM VIEW INT SP SW AF VR POWER SW R193 4 5 6 SELECT Surface Inside-1 Inside-2...

  • Page 37: Block Diagram

    SECTION 10 BLOCK DIAGRAM Q9: DTC144EU 2SC4116 Q10: XP1214 MAIN UNIT TA75S01F RIPPLE VCOS FILTER BIAS 1.25V 2SK880 400-520 MHz BUFF LVIN 2SC4226 D2,D3 1SV307 D4, D5: MA77 TC75S51F D24, D25: MA77 CR-667 SA7025 2SC5107 2SC5107 2SC5107 2SC3585 2SK2973 2SK2974 RB706F-40 RX VCO DRIVE...
  • Page 38 BUSY 15.6 MHz 880 mVp-p SECTION 11 VOLTAGE DIAGRAM SIG1 100k OPT11 OPT12 C424 R336 C105 R52 100 OPT13 C100 0.001 R294 47k OPV11 APST 0.001 R295 47k OPV12 C104 R337 CR-667 2SK880 OPV13 RGS1 R361 56k 15.600 MHz BIAS C106 R296 C103...
  • Page 39 MHz 880 mVp-p Note [F40G]: IC-F40GT/F40GS [GT] : IC-F40GT/F41GT : L-band 400–430 MHz [H] : H-band 480–512/480–520 MHz [F41G]: IC-F41GT/F41GS [GS] : IC-F40GS/F41GS [ML] : ML-band 440–480 MHz [M] : ML and MH bands C459 47p [F41G] HSU88 1.8 H C100 2.2k [M] RX VCO...
  • Page 40 BUSY 15.6 MHz 880 mVp-p Note [F40G]: IC-F40GT/F40GS [GT] : IC-F40GT/F41GT : L-band 400–430 MHz [H] : H-band 480–512/480–520 MHz SECTION 11 VOLTAGE DIAGRAM SIG1 100k OPT11 C459 [F41G]: IC-F41GT/F41GS [GS] : IC-F40GS/F41GS [ML] : ML-band 440–480 MHz [M] : ML and MH bands OPT12 47p [F41G] C424...
  • Page 41 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 42 S-13803MZ-C1-q 1-1-32, Kamiminami, Hirano-ku, Osaka 547-0003, Japan © 2001 Icom Inc.

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