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

Page 76

10-3 VOLTAGE DIAGRAM

 

 

 

 

 

 

 

 

 

 

 

12.49 V

 

 

 

 

 

13.80 V

 

12.47 V

 

 

 

 

J1

R1 24

 

 

R5 10 k

 

 

8.01 V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7.98 V

7.20 V

 

 

 

 

 

 

 

 

W1

 

 

Q1

 

 

 

D2 1SS184

 

 

 

 

 

 

 

 

 

J2

R2 24

 

2SB1201 S

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CHARGE+

C1

 

 

R3

 

11.82 V

C3

C4

0.1

 

 

 

0.1

 

 

27

 

11.80 V

0.1

 

 

 

 

 

 

Q2

 

13.63 V

R6

 

 

 

 

 

RN2404

 

12.46 V

27

 

 

 

 

 

 

 

 

 

 

 

TEMP

 

DS1 TLG124A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R7

 

R8

 

 

 

 

 

C2

 

2 k

 

 

 

 

 

2 k

 

 

 

 

 

 

 

0.1

 

 

 

 

 

 

 

 

 

 

 

 

 

R4 10 k

 

 

 

 

 

 

GND

 

 

 

 

D1

 

0.23 V

 

 

 

 

 

 

1SS355

 

 

 

 

 

 

0.22 V

 

 

 

 

 

 

 

 

 

 

 

Q3

 

 

 

Q4

 

R9

 

 

R11

 

 

 

56 k

 

 

RN1409

 

 

2SC2712 GR

 

 

 

1 k

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.74 V

R10

 

 

 

 

 

 

 

10 k

 

0 V

 

 

 

 

 

0.73 V

 

 

13.77 V

D3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MA8056 M

 

 

 

 

 

 

 

 

 

5.62 V

 

 

 

 

 

 

 

 

0 V

 

 

 

 

 

10-4 BOARD LAYOUT

 

 

 

 

 

 

 

 

C1

C4 C3

D2

R1

 

R2

R3

 

 

Q2

 

R11

 

R4

D3

Q3

W1

R9

C2

 

R10

R7

Q4

D1

R8

 

 

R6

R5

Q1

10 - 2

Page 75 Page 77
Image 76
Page 75 Page 77
Contents VHF FM Transceivers Ordering Parts IntroductionRepair Notes Table of Contents Section Specifications EIA/TIAMain Unit TOP View Inside ViewsBottom View Disassembly and Option Instructions Disassembly InstructionRemoving the Chassis Panel Removing the Main UnitOptional Unit Installations Circuit Description Receiver CircuitsTransmitter Circuits Power Supply Circuits Voltage Line PLL CircuitPort Allocations Output Expander IC IC10Adjustment Procedures Preparation¥ JIG cable Top view PLL Adjustment Software Adjustment TXFSoftware Adjustment Parts List Main UnitVariable Thermistor NTCCM20124AG473J-T Tantalum ECST0JY106R Chassis Unit Accessories Mechanical Parts and DisassemblyChassis Parts IC-F3GS parts Transistor and FET’S SEMI-CONDUCTOR InformationDiodes Board Layouts General and EIA/TIA Versions Except W/N-TYPEMP6 Main Unit Bottom ViewIC1 ETS/CEPT VersionMP5 VHF FI1 Parts List Disassembly InformationBC-137 Optional Desktop Charger Informasion ConvenientVoltage Diagram Board LayoutBlock Diagram Option UnitVoltage Diagram BU4066BCFVBand of ETS/CEPT version N-type DTA144EU Section Voltage Diagram Avref Vtref Toned Tonem AvccPage 32, Kamiminami, Hirano-ku, Osaka, 547-0003, Japan UHF FM Transceivers IC-F4GTIC-F4GS Preparation PLL Adjustment Software Adjustment Power supply requirement APC IC3A NJM3403AV Disassembly and Option Instructions Optional Unit Installations 2ND if and Demodulator Circuits RF signal From PLL Driver PLL Circuit Power Supply Circuits Voltage Line Resistor R132PTT Adjustment Procedures Screen Display Example DC Power Cable Connections L405 L11 Powerlo BPF T1 NJM3403AV-TE1 IC4 Resistor ERJ2GE Thermistor NTCCM1608 4LH 223KC Ceramic ECUE1H470JCQ ECEV1CA470SP Other Ceramic ECJ0EB1E471K Band MHz band MHz and H-band IC-F4GS parts DTA144 EU DTC144 EE DTC144 EU DTC144 TU LOW Band DS1FI1 440-470 MHz Band Except W/N-TYPE Icom 470-500 MHz and High Bands B5542B C308 Q19 B5688B BC-137 Optional Desktop Charger Informasion Voltage Diagram Type Type of GEN Type of GEN and EIA/TIA version NJM3403AV M1-band of GEN and EIA/TIA version G W-type of GEN Type 2SC3585 R44 Q403 2SC5107 O Band of ETS/CEPT version N-type M1 440-470 MHz-band Page 13713IZ-C1U
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