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Icom IC-F3GS, IC-F3GT service manual Voltage Diagram, Board Layout

Models: IC-F3GS

1 83

Page 76

10-3 VOLTAGE DIAGRAM
			12.49 V
	13.80 V		12.47 V
J1	R1 24			R5 10 k			8.01 V
							8.01 V
							7.98 V	7.20 V
								7.20 V
W1			Q1				D2 1SS184
			Q1
J2	R2 24		2SB1201 S
J2	R2 24
								CHARGE+
C1			R3		11.82 V		C3	C4
0.1			R3		11.82 V		C3	0.1
0.1			27		11.80 V		0.1	0.1
			27		11.80 V		0.1
	Q2		13.63 V	R6
	RN2404		12.46 V	27
	RN2404							TEMP
	DS1 TLG124A							TEMP
	DS1 TLG124A
				R7		R8
			C2	R7		2 k
			C2	2 k
			0.1	2 k
			0.1
	R4 10 k							GND
				D1		0.23 V
				1SS355		0.23 V
				1SS355		0.22 V
						0.22 V
	Q3				Q4		R9
	Q3	R11			Q4		56 k
	RN1409	R11			2SC2712 GR
	RN1409	1 k			2SC2712 GR
		1 k
						0.74 V	R10
						0.74 V	10 k
0 V						0.73 V
13.77 V	D3
	D3
	MA8056 M
			5.62 V
			0 V
10-4 BOARD LAYOUT

C4 C3

R1
R2	R3
R2
	Q2

	R11
R4	D3	Q3

R9	C2

R10

Q4	D1	R8
		R6

10 - 2

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Image 76

Icom IC-F3GS, IC-F3GT service manual Voltage Diagram, Board Layout

Contents

SERVICE MANUAL VHF FM TRANSCEIVERSINTRODUCTION DANGERORDERING PARTS REPAIR NOTESTABLE OF CONTENTS SPECIFICATIONS SECTIONETS 300 EIA/TIAMAIN UNIT TOP VIEW SECTION 2 INSIDE VIEWSBOTTOM VIEW SECTION 3 DISASSEMBLY AND OPTION INSTRUCTIONS 3-1 DISASSEMBLY INSTRUCTIONREMOVING THE CHASSIS PANEL REMOVING THE MAIN UNIT3-2 OPTIONAL UNIT INSTALLATIONS Remove the option coverSECTION 4 CIRCUIT DESCRIPTION 4-1 RECEIVER CIRCUITS4-1-1 ANTENNA SWITCHING CIRCUIT 4-1-2 RF CIRCUIT4-2 TRANSMITTER CIRCUITS 4-1-7 WIDE AND NARROW SWITCHING CIRCUIT4-2-3 DRIVE/POWER AMPLIFIER CIRCUITS 4-1-5 AF CIRCUIT4-3 PLL CIRCUIT 4-4 POWER SUPPLY CIRCUITS VOLTAGE LINEPLL circuit LINE4-5 PORT ALLOCATIONS 4-5-1 CPU IC8CPU IC8-continued 4-5-2 OUTPUT EXPANDER IC IC10SECTION 5 ADJUSTMENT PROCEDURES 5-1 PREPARATIONSTARTING SOFTWARE ADJUSTMENT ADJUSTMENT SOFTWARE INSTALLATIONRF Power High Screen display exampe¥ JIG cable CS-F3G ADJ Rev.2.0Top view ¥ DC power cable connectionsConnection 5-2 PLL ADJUSTMENT ADJUSTMENTADJUSTMENT CONDITIONS ADJUSTMENT5-3 SOFTWARE ADJUSTMENT ADJUSTMENTADJUSTMENT CONDITION MEASUREMENTSOFTWARE ADJUSTMENT - continued ADJUSTMENTADJUSTMENT CONDITION MEASUREMENTSECTION 6 PARTS LIST MAIN UNITMAIN UNIT ORDERMAIN UNIT MAIN UNITORDER DESCRIPTIONMAIN UNIT MAIN UNITORDER DESCRIPTIONMAIN UNIT MAIN UNITORDER DESCRIPTIONMAIN UNIT MAIN UNITCHASSIS UNIT ORDERSECTION 7 MECHANICAL PARTS AND DISASSEMBLY ACCESSORIESCHASSIS PARTS MAIN UNITIC-F3GS parts UNIT abbreviation C CHASSIS PARTS, M MAIN UNITTRANSISTOR AND FET’S SECTION 8 SEMI-CONDUCTOR INFORMATIONDIODES 9-1 GENERAL AND EIA/TIA VERSIONS EXCEPT W/N-TYPE SECTION 9 BOARD LAYOUTSMAIN UNIT TOP VIEW R143 OPTIONB5386H ICOM9-2 ETS/CEPT VERSION MAIN UNIT TOP VIEWB5571C R143ICOM to the OPTIONAL unitVHF W/N DS1 C2559-3 W/N-TYPE MAIN UNIT TOP VIEWB5687A BUSYOPTION ICOM10-1 PARTS LIST 10-2 DISASSEMBLY INFORMATIONSECTION 10 BC-137 OPTIONAL DESKTOP CHARGER INFORMASION MAIN UNIT10-3 VOLTAGE DIAGRAM 10-4 BOARD LAYOUT2SB1201 S RN2404SECTION 11 BLOCK DIAGRAM W/N-typeETS/CEPT version W-type of GENSECTION 12 VOLTAGE DIAGRAM A L-band of ETS/CEPT version Page VOLTAGE DIAGRAM SECTIONP81/AN1 P82/AN2 P83/AN3 P84/AN4 P85/AN5 P86/AN6 P87/AN7Page S-13713IZ-C1V 1-1-32, Kamiminami, Hirano-ku, Osaka, 547-0003, Japan2000 Icom Inc UHF FM TRANSCEIVERS SERVICE MANUALINTRODUCTION DANGERORDERING PARTS REPAIR NOTESTABLE OF CONTENTS SPECIFICATIONS SECTIONETS 300 EIA/TIAAntenna switcing circuit D2, D8 MA77 Power amplifier Q1 2SK2974 APC SECTION 2 INSIDE VIEWSMAIN UNIT TOP VIEW BOTTOM VIEWSECTION 3 DISASSEMBLY AND OPTION INSTRUCTIONS 3-1 DISASSEMBLY INSTRUCTIONREMOVING THE CHASSIS PANEL REMOVING THE MAIN UNIT1 Remove the option cover 3-2 OPTIONAL UNIT INSTALLATIONS3 Replace the option cover to the chassis-hole 4-1-1 ANTENNA SWITCHING CIRCUIT SECTION 4 CIRCUIT DESCRIPTION4-1 RECEIVER CIRCUITS 4-1-2 RF CIRCUIT4-1-7 WIDE AND NARROW SWITCHING CIRCUIT 4-2-3 DRIVE/POWER AMPLIFIER CIRCUITS4-2 TRANSMITTER CIRCUITS 4-1-5 AF CIRCUIT4-4 POWER SUPPLY CIRCUITS VOLTAGE LINE 4-3 PLL CIRCUITPLL CIRCUIT LINE4-5 PORT ALLOCATIONS 4-5-1 CPU IC8CPU IC8-continued 4-5-2 OUTPUT EXPANDER IC IC10SECTION 5 ADJUSTMENT PROCEDURES STARTING SOFTWARE ADJUSTMENTADJUSTMENT SOFTWARE INSTALLATION 5-1 PREPARATIONJIG CABLE SCREEN DISPLAY EXAMPLESQL Lev DC POWER CABLE CONNECTIONS Top viewCONNECTION computer5-2 PLL ADJUSTMENT ADJUSTMENTADJUSTMENT CONDITIONS ADJUSTMENT5-3 SOFTWARE ADJUSTMENT ADJUSTMENTADJUSTMENT CONDITION MEASUREMENTSOFTWARE ADJUSTMENT - continued ADJUSTMENTADJUSTMENT CONDITION MEASUREMENTSECTION 6 PARTS LIST MAIN UNITMAIN UNIT ORDERMAIN UNIT MAIN UNITORDER DESCRIPTIONMAIN UNIT MAIN UNITORDER DESCRIPTIONMAIN UNIT MAIN UNITORDER DESCRIPTIONMAIN UNIT MAIN UNITORDER DESCRIPTIONORDER MAIN UNITDESCRIPTION SECTION 7 MECHANICAL PARTS AND DISASSEMBLY ACCESSORIESCHASSIS PARTS MAIN UNITIC-F4GS parts EP2 M MAIN unitTRANSISTOR AND FET’S SECTION 8 SEMI-CONDUCTOR INFORMATIONDIODES 9-1 LOW BAND SECTION 9 BOARD LAYOUTSU H F MAIN UNIT TOP VIEWR143 U H F 9-2 440-470 MHz BAND EXCEPT W/N-TYPEMAIN UNIT TOP VIEW ICOM 9-3 470-500 MHz AND HIGH BANDS MAIN UNIT TOP VIEWJ5 to the OPTIONAL unit9-4 W/N-TYPE MAIN UNIT TOP VIEWR143 10-1 PARTS LIST 10-2 DISASSEMBLY INFORMATIONSECTION 10 BC-137 OPTIONAL DESKTOP CHARGER INFORMASION MAIN UNIT10-3 VOLTAGE DIAGRAM 10-4 BOARD LAYOUTSECTION 11 BLOCK DIAGRAM W/N-typeW-type of GEN N-typeVOLTAGE DIAGRAM SECTIONTx 2.19 Tx 4.8447 P 47 P OTHER VOLTAGE DIAGRAM SECTIONCPU5 DTMF MTONE CPU5 BDET PTT CTCIN CPU5Page S-13713IZ-C1U 1-1-32, Kamiminami, Hirano-ku, Osaka, 547-0003, Japan2000 Icom Inc