Icom IC-F51, IC-F50 service manual 11-3 VR / Connector Boards VR Board

Page 36

11-3 VR / CONNECTOR BOARDS

VR BOARD

R601

 

 

TP76N97N-13F-10KA-2497

 

 

DUSE

4

 

AFOUT

 

3

From / to the J402

SIGNAL

2

at the FRONT UNIT

PWON

1

 

 

 

W601

 

 

 

CONNECTOR BOARD

 

 

 

 

 

 

 

 

 

 

 

 

VCC

 

EP701

 

 

 

 

 

 

 

 

 

 

AFO

 

 

 

 

 

 

 

 

 

 

 

 

 

EP702

VCC

 

 

 

 

 

 

 

 

OPTV

 

 

 

 

 

 

 

 

 

 

 

 

 

EP703

MICE

 

 

 

 

 

 

 

 

GND

 

 

 

 

 

 

 

 

 

 

 

 

1

AFO

C701

0.001

 

C702

0.001

 

C703

0.001

 

 

 

VCC

R701

 

 

 

 

 

 

 

 

 

 

2

OPTV

1 k

 

 

 

 

 

 

 

 

 

 

3

MICE

OPTV

 

 

 

 

 

 

 

 

To the FRONT UNIT

4

RESET

RESET

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RES

5

RXD

RXD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CLI

6

TXD

TXD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CLO

7

MIC

 

 

 

 

 

 

 

 

 

 

D701 M1005-AVR

C080MTABB

D702

M1005-AVR

C080MTABB

D703

M1005-AVR

C080MTABB

D704

M1005-AVR

C080MTABB

8

PTT

9

 

 

 

 

 

 

 

 

 

 

 

 

MP701

 

 

 

 

 

 

 

 

 

 

 

 

EP704

MIC

 

 

C704

0.001

 

 

 

 

 

MIC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

EP705

PTT

 

 

 

 

 

 

 

 

 

PTT

 

 

 

 

 

AVR-M1005

C080MTABB

 

 

 

 

 

 

 

 

 

D705

 

 

 

 

 

 

NOTES :

Voltage line

TX line

RX line

11 - 3

Image 36
Contents VHF Transceiver Introduction Ordering PartsRepair Notes Table of Contents Specifications ‘ General‘ Transmitter ‘ ReceiverInside Views Main UnitFront Unit Disassembly Instructions Removing the Chassis UnitRemoving the Front Unit Removing the Main UnitAntenna Switching Circuit Main Unit Receiver CircuitsRF Circuit Main Unit 3 1ST Mixer and 1ST if Circuits Main UnitTransmitter Circuits AF Amplifier Circuit Main and Front UnitsReceive Mute Circuits Main and Front Units Microphone Amplifier Circuit Front and Main UnitsDRIVE/POWER Amplifier Circuits PLL CircuitsModulation Circuit Main Unit APC Circuit Main UnitPower Supply Circuit VCO Circuit Main UnitMain Unit Voltage Line Front Unit Voltage LineOther Circuits Port AllocationsCompounder Circuit Main Unit Expander IC Front Unit IC410SEG1 SCKMdio Msck4 D/A Converter IC Main Unit IC6 Expander IC Main Unit IC12Preparation Adjustment Frequency List Frequency Adjustment ItemScreen Display Example CtcssConnection JIG CablePtte PTT MIC Mice SP+Software Adjustments Transmitting Software Adjustments Receiving ConvenientConnector Board VR BoardFront Unit Main Unit IC9Varicap HVC375BTRF Themistor Ertjoep 473J Ceramic ECJ0EC1H0R5B Mechanical Parts and Disassembly Unitmm inch SEMI-CONDUCTOR Information Transistor and FET’SDiodes Board Layouts Main UnitTOP View Bottom View Q23Front Unit J402MC401 VHF B6034B VR BoardConnector Board MP701Section Block Diagram CPUVoltage Diagram 2SC4116BLTC7W66FK 11-3 VR / Connector Boards VR Board Icom America Inc 32, Kamiminami, Hirano-ku, Osaka, 547-0003, Japan