Icom IC-F50, IC-F51 service manual Table of Contents

Page 3

 

 

TABLE OF CONTENTS

 

SECTION

1

SPECIFICATIONS

 

SECTION

2

INSIDE VIEWS

 

SECTION

3

DISASSEMBLY INSTRUCTIONS

 

SECTION

4

CIRCUIT DESCRIPITON

 

 

4-1

RECEIVER CIRCUITS

4-1

 

4-2

TRANSMITER CIRCUITS

4-2

 

4-3

PLL CIRCUITS

4-2

 

4-4

POWER SUPPLY CIRCUITS

4-4

 

4-5

OTHER CIRCUITS

4-5

 

4-6

PORT ALLOCATIONS

4-5

SECTION

5

ADJUSTMENT PROCEDURES

 

 

5-1

PREPARATION

5-1

 

5-2

SOFTWARE ADJUSTMENTS

5-4

SECTION

6

PARTS LIST

 

SECTION

7

MECHANICAL PARTS AND DISASSEMBLY

 

SECTION

8

SEMI-CONDUCTOR INFORMATION

 

SECTION

9

BOARD LAYOUTS

 

 

9-1

MAIN UNIT

9-1

 

9-2

FRONT UNIT

9-3

 

9-3

VR BOARD

9-5

 

9-4

CONNECTOR BOARD

9-6

SECTION 10 BLOCK DIAGRAM

SECTION 11 VOLTAGE DIAGRAM

11-1 MAIN UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1

11-2 RF UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-2

11-3 VR / CONNECTOR BOARDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-3

Icom, Icom Inc. and are registered trademarks of Icom Incorporated (Japan) in the United States, the United Kingdom, Germany, France, Spain, ussia and/or other countries.

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Contents
VHF Transceiver Introduction Ordering PartsRepair Notes Table of Contents ‘ Receiver Specifications‘ General ‘ TransmitterInside Views Main UnitFront Unit Removing the Main Unit Disassembly InstructionsRemoving the Chassis Unit Removing the Front Unit3 1ST Mixer and 1ST if Circuits Main Unit Antenna Switching Circuit Main UnitReceiver Circuits RF Circuit Main UnitMicrophone Amplifier Circuit Front and Main Units Transmitter CircuitsAF Amplifier Circuit Main and Front Units Receive Mute Circuits Main and Front UnitsAPC Circuit Main Unit DRIVE/POWER Amplifier CircuitsPLL Circuits Modulation Circuit Main UnitFront Unit Voltage Line Power Supply CircuitVCO Circuit Main Unit Main Unit Voltage LineExpander IC Front Unit IC410 Other CircuitsPort Allocations Compounder Circuit Main UnitMsck SEG1SCK MdioExpander IC Main Unit IC12 4 D/A Converter IC Main Unit IC6Preparation Ctcss Adjustment Frequency ListFrequency Adjustment Item Screen Display ExampleSP+ ConnectionJIG Cable Ptte PTT MIC MiceSoftware Adjustments Transmitting Convenient Software Adjustments ReceivingConnector Board VR BoardFront Unit IC9 Main UnitVaricap HVC375BTRF Themistor Ertjoep 473J Ceramic ECJ0EC1H0R5B Mechanical Parts and Disassembly Unitmm inch SEMI-CONDUCTOR Information Transistor and FET’SDiodes Board Layouts Main UnitTOP View Q23 Bottom ViewJ402 Front UnitMC401 VR Board VHF B6034BMP701 Connector BoardCPU Section Block Diagram2SC4116BL Voltage DiagramTC7W66FK 11-3 VR / Connector Boards VR Board Icom America Inc 32, Kamiminami, Hirano-ku, Osaka, 547-0003, Japan
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