Icom IC-F3GS Disassembly and Option Instructions, Disassembly Instruction, Removing the Main Unit

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SECTION 3 DISASSEMBLY AND OPTION INSTRUCTIONS

3-1 DISASSEMBLY INSTRUCTION

• REMOVING THE CHASSIS PANEL

1Unscrew 1 nut A, and remove 1 knob B.

2 Unscrew 2 screws C.

3 Take off the chassis in the direction of the arrow. 4 Unplug J6 to separate front panel and chassis.

C (nickel,2mm) x 2

Chassis

B

J6 (Speaker connector)

A

Front panel

REMOVING THE MAIN UNIT

1 Remove the searing rubber.

2 Unsolder 3 points D, and unscrew 1 nut E.

3 Unscrew 4 screws F and 5 screws G (silver, 2mm) to separate the chassis and the MAIN unit. 4 Take off the MAIN unit in the direction of the arrow.

F(black,2mm) x 2

 

G (silver,2mm) x 6

 

 

Shield cover

F

D

 

 

 

 

D

G

 

 

 

 

MAIN unit

D

 

 

E

 

Guide holes

 

 

Sealing rubber

 

 

 

Chassis

 

3 - 1

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Contents VHF FM Transceivers Introduction Ordering PartsRepair Notes Table of Contents ‘ Transmitter Section Specifications‘ General ‘ ReceiverInside Views Main Unit TOP ViewBottom View Removing the Chassis Panel Disassembly and Option InstructionsDisassembly Instruction Removing the Main UnitOptional Unit Installations SpongeCircuit Description Receiver CircuitsTransmitter Circuits VCC Power Supply Circuits Voltage LinePLL Circuit OPTPort Allocations Output Expander IC IC10Adjustment Procedures PreparationSPE GNDClone Software Adjustment DC Power Supply PLL AdjustmentMain PLL AdjustmentPLL Lock VoltageSoftware Adjustment Level SensitivitySquelch SQLParts List Main UnitVariable Ceramic JB 1C Chassis Parts Mechanical Parts and DisassemblyAccessories EP1 EP2 MP1 MP2IC-F3GS parts SEMI-CONDUCTOR Information Transistor and FET’SDiodes Board Layouts Main UnitIC5 FI2IC8 CirqBlLOCK Diagram Voltage Diagram IC3CIC1 DTA144EU Section Voltage Diagram Avref Vtref Toned Tonem Avcc16, Kamihigashi, Hirano-ku, Osaka 547-0002, Japan 16, Kamihigashi, Hirano-ku, Osaka, 547-0002, Japan
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