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Icom
IC-F50, IC-F51
service manual
VHF B6034B, VR Board
Models:
IC-F51
IC-F50
1
31
38
38
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38 pages
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Specs
Section Block Diagram
Connector Board
Disassembly Instructions
Adjustment Frequency List
DRIVE/POWER Amplifier Circuits
Page 31
Image 31
9-3
VR BOARD
•
TOP VIEW
R601
•
BOTTOM VIEW
VHF B6034B
9 - 5
Page 30
Page 32
Page 31
Image 31
Page 30
Page 32
Contents
VHF Transceiver
Ordering Parts
Introduction
Repair Notes
Table of Contents
‘ Receiver
Specifications
‘ General
‘ Transmitter
Main Unit
Inside Views
Front Unit
Removing the Main Unit
Disassembly Instructions
Removing the Chassis Unit
Removing the Front Unit
3 1ST Mixer and 1ST if Circuits Main Unit
Antenna Switching Circuit Main Unit
Receiver Circuits
RF Circuit Main Unit
Microphone Amplifier Circuit Front and Main Units
Transmitter Circuits
AF Amplifier Circuit Main and Front Units
Receive Mute Circuits Main and Front Units
APC Circuit Main Unit
DRIVE/POWER Amplifier Circuits
PLL Circuits
Modulation Circuit Main Unit
Front Unit Voltage Line
Power Supply Circuit
VCO Circuit Main Unit
Main Unit Voltage Line
Expander IC Front Unit IC410
Other Circuits
Port Allocations
Compounder Circuit Main Unit
Msck
SEG1
SCK
Mdio
Expander IC Main Unit IC12
4 D/A Converter IC Main Unit IC6
Preparation
Ctcss
Adjustment Frequency List
Frequency Adjustment Item
Screen Display Example
SP+
Connection
JIG Cable
Ptte PTT MIC Mice
Software Adjustments Transmitting
Convenient
Software Adjustments Receiving
VR Board
Connector Board
Front Unit
IC9
Main Unit
Varicap HVC375BTRF
Themistor Ertjoep 473J
Ceramic ECJ0EC1H0R5B
Mechanical Parts and Disassembly
Unitmm inch
Transistor and FET’S
SEMI-CONDUCTOR Information
Diodes
Main Unit
Board Layouts
TOP View
Q23
Bottom View
J402
Front Unit
MC401
VR Board
VHF B6034B
MP701
Connector Board
CPU
Section Block Diagram
2SC4116BL
Voltage Diagram
TC7W66FK
11-3 VR / Connector Boards VR Board
Icom America Inc
32, Kamiminami, Hirano-ku, Osaka, 547-0003, Japan
