Manuals / Icom / Marine Equipment / Marine Radio

Icom IC-F3GT, IC-F3GS service manual Inside Views, Main Unit Top View, Bottom View

Models: IC-F3GS

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Page 45

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SECTION 2 INSIDE VIEWS

• MAIN UNIT

TOP VIEW

Antenna switcing circuit (D2, D8: MA77)

Power amplifier (Q1: 2SK2974)

APC

IC3A: NJM3403AV

Q37: DTA144EU

IF amplifier

(Q14: 2SC4215 O)

PLL IC

(IC1: ∝PD3140GS)

TX/RX switch (D3, D4: MA77)

Mic amplifier circuit

BOTTOM VIEW

Antenna switcing circuit (D1: 1SV307)

1st mixer (Q13: 3SK239A)

VCO circuit

D/A converter

(IC10: M62363FP-650C)

EEPROM

IC7: HN58X2432TI

(	[OTHER]
	HN58X2464TI
	[100 channel version])

CPU

(IC8: HD6433876B50H)

Low pass filter circuit

2 - 1

Page 45

Image 45

Icom IC-F3GT, IC-F3GS service manual Inside Views, Main Unit Top View, Bottom View

Contents

VHF FM TRANSCEIVERS SERVICE MANUALDANGER INTRODUCTIONORDERING PARTS REPAIR NOTESTABLE OF CONTENTS SECTION SPECIFICATIONSETS 300 EIA/TIASECTION 2 INSIDE VIEWS MAIN UNIT TOP VIEWBOTTOM VIEW 3-1 DISASSEMBLY INSTRUCTION SECTION 3 DISASSEMBLY AND OPTION INSTRUCTIONSREMOVING THE CHASSIS PANEL REMOVING THE MAIN UNITRemove the option cover 3-2 OPTIONAL UNIT INSTALLATIONS4-1 RECEIVER CIRCUITS SECTION 4 CIRCUIT DESCRIPTION4-1-1 ANTENNA SWITCHING CIRCUIT 4-1-2 RF CIRCUIT4-1-7 WIDE AND NARROW SWITCHING CIRCUIT 4-2 TRANSMITTER CIRCUITS4-2-3 DRIVE/POWER AMPLIFIER CIRCUITS 4-1-5 AF CIRCUIT4-4 POWER SUPPLY CIRCUITS VOLTAGE LINE 4-3 PLL CIRCUITPLL circuit LINE4-5-1 CPU IC8 4-5 PORT ALLOCATIONSCPU IC8-continued 4-5-2 OUTPUT EXPANDER IC IC105-1 PREPARATION SECTION 5 ADJUSTMENT PROCEDURESSTARTING SOFTWARE ADJUSTMENT ADJUSTMENT SOFTWARE INSTALLATIONScreen display exampe RF Power High¥ JIG cable CS-F3G ADJ Rev.2.0¥ DC power cable connections Top viewConnection ADJUSTMENT 5-2 PLL ADJUSTMENTADJUSTMENT CONDITIONS ADJUSTMENTADJUSTMENT 5-3 SOFTWARE ADJUSTMENTADJUSTMENT CONDITION MEASUREMENTADJUSTMENT SOFTWARE ADJUSTMENT - continuedADJUSTMENT CONDITION MEASUREMENTMAIN UNIT SECTION 6 PARTS LISTMAIN UNIT ORDERMAIN UNIT MAIN UNITORDER DESCRIPTIONMAIN UNIT MAIN UNITORDER DESCRIPTIONMAIN UNIT MAIN UNITORDER DESCRIPTIONMAIN UNIT MAIN UNITCHASSIS UNIT ORDERACCESSORIES SECTION 7 MECHANICAL PARTS AND DISASSEMBLYCHASSIS PARTS MAIN UNITUNIT abbreviation C CHASSIS PARTS, M MAIN UNIT IC-F3GS partsSECTION 8 SEMI-CONDUCTOR INFORMATION TRANSISTOR AND FET’SDIODES SECTION 9 BOARD LAYOUTS 9-1 GENERAL AND EIA/TIA VERSIONS EXCEPT W/N-TYPEMAIN UNIT TOP VIEW OPTION R143B5386H ICOMMAIN UNIT TOP VIEW 9-2 ETS/CEPT VERSIONR143 B5571CICOM to the OPTIONAL unitDS1 C255 VHF W/N9-3 W/N-TYPE MAIN UNIT TOP VIEWBUSY B5687AOPTION ICOM10-2 DISASSEMBLY INFORMATION 10-1 PARTS LISTSECTION 10 BC-137 OPTIONAL DESKTOP CHARGER INFORMASION MAIN UNIT10-4 BOARD LAYOUT 10-3 VOLTAGE DIAGRAM2SB1201 S RN2404W/N-type SECTION 11 BLOCK DIAGRAMETS/CEPT version W-type of GENSECTION 12 VOLTAGE DIAGRAM A L-band of ETS/CEPT version Page SECTION VOLTAGE DIAGRAMP81/AN1 P82/AN2 P83/AN3 P84/AN4 P85/AN5 P86/AN6 P87/AN7Page 1-1-32, Kamiminami, Hirano-ku, Osaka, 547-0003, Japan S-13713IZ-C1V2000 Icom Inc SERVICE MANUAL UHF FM TRANSCEIVERSDANGER INTRODUCTIONORDERING PARTS REPAIR NOTESTABLE OF CONTENTS SECTION SPECIFICATIONSETS 300 EIA/TIASECTION 2 INSIDE VIEWS Antenna switcing circuit D2, D8 MA77 Power amplifier Q1 2SK2974 APCMAIN UNIT TOP VIEW BOTTOM VIEW3-1 DISASSEMBLY INSTRUCTION SECTION 3 DISASSEMBLY AND OPTION INSTRUCTIONSREMOVING THE CHASSIS PANEL REMOVING THE MAIN UNIT3-2 OPTIONAL UNIT INSTALLATIONS 1 Remove the option cover3 Replace the option cover to the chassis-hole SECTION 4 CIRCUIT DESCRIPTION 4-1-1 ANTENNA SWITCHING CIRCUIT4-1 RECEIVER CIRCUITS 4-1-2 RF CIRCUIT4-2-3 DRIVE/POWER AMPLIFIER CIRCUITS 4-1-7 WIDE AND NARROW SWITCHING CIRCUIT4-2 TRANSMITTER CIRCUITS 4-1-5 AF CIRCUIT4-3 PLL CIRCUIT 4-4 POWER SUPPLY CIRCUITS VOLTAGE LINEPLL CIRCUIT LINE4-5-1 CPU IC8 4-5 PORT ALLOCATIONSCPU IC8-continued 4-5-2 OUTPUT EXPANDER IC IC10STARTING SOFTWARE ADJUSTMENT SECTION 5 ADJUSTMENT PROCEDURESADJUSTMENT SOFTWARE INSTALLATION 5-1 PREPARATIONSCREEN DISPLAY EXAMPLE JIG CABLESQL Lev Top view DC POWER CABLE CONNECTIONSCONNECTION computerADJUSTMENT 5-2 PLL ADJUSTMENTADJUSTMENT CONDITIONS ADJUSTMENTADJUSTMENT 5-3 SOFTWARE ADJUSTMENTADJUSTMENT CONDITION MEASUREMENTADJUSTMENT SOFTWARE ADJUSTMENT - continuedADJUSTMENT CONDITION MEASUREMENTMAIN UNIT SECTION 6 PARTS LISTMAIN UNIT ORDERMAIN UNIT MAIN UNITORDER DESCRIPTIONMAIN UNIT MAIN UNITORDER DESCRIPTIONMAIN UNIT MAIN UNITORDER DESCRIPTIONMAIN UNIT MAIN UNITORDER DESCRIPTIONMAIN UNIT ORDERDESCRIPTION ACCESSORIES SECTION 7 MECHANICAL PARTS AND DISASSEMBLYCHASSIS PARTS MAIN UNITEP2 M MAIN unit IC-F4GS partsSECTION 8 SEMI-CONDUCTOR INFORMATION TRANSISTOR AND FET’SDIODES SECTION 9 BOARD LAYOUTS 9-1 LOW BANDU H F MAIN UNIT TOP VIEWR143 9-2 440-470 MHz BAND EXCEPT W/N-TYPE U H FMAIN UNIT TOP VIEW ICOM MAIN UNIT TOP VIEW 9-3 470-500 MHz AND HIGH BANDSthe OPTIONAL unit J5 toMAIN UNIT TOP VIEW 9-4 W/N-TYPER143 10-2 DISASSEMBLY INFORMATION 10-1 PARTS LISTSECTION 10 BC-137 OPTIONAL DESKTOP CHARGER INFORMASION MAIN UNIT10-4 BOARD LAYOUT 10-3 VOLTAGE DIAGRAMW/N-type SECTION 11 BLOCK DIAGRAMW-type of GEN N-typeSECTION VOLTAGE DIAGRAMTx 2.19 Tx 4.8447 P 47 P OTHER SECTION VOLTAGE DIAGRAMCPU5 DTMF MTONE CPU5 BDET PTT CTCIN CPU5Page 1-1-32, Kamiminami, Hirano-ku, Osaka, 547-0003, Japan S-13713IZ-C1U2000 Icom Inc