1F1CP1CP2CP3CP4CP5CP6J4CHGOUTCHGOUTDET2BATT–DET1BATT+SWCONTTHD19to TANSHI BOARD J1J1THDCONT5VBATT+DET1BATT–DET2CHGOUTCHGOUT91to BC-156MAIN UNIT J412 - 312-4 BC-156 BOARD LAYOUTS• MAIN UNIT (TOP VIEW)• TANSHI BOARD (TOP VIEW)

service manual

specifications

bottom view

logic unit

disassembly instructions

receiver circuits

pll circuits

other circuits

power supply circuits

software adjustments

main unit

explanatory notes

disassembly information

bc-156 voltage diagram

bc-156 board layouts

Icom IC-R20 Service Manual

IC-R20

dualwatch operation

supplied accessories

quick reference guide

charging the battery

I Front, top and side panels

panel description

I Function display

I Battery installation

I Caution

I Mode selection

I Operating band selection

I Setting a tuning step

I Receive mode selection

I Receiving

I Squelch level setting

I Attenuator function

I Duplex operation

I AFC function

I Band scope

I [DIAL] function assignment

I Setting audio volume

I Main band selection

I General description

I Memory bank setting

I Memory bank selection

I Programming memory/bank name

I Selecting memory/bank name indication

I Copying memory contents

I Memory clearing

I Erasing/transferring bank contents

I Scan types

I Full/band/programmed scan

I Scan edges programming

I Memory/bank/all bank scan

I Auto-memory write scan

I Skip channel/frequency setting

I Scan resume condition

scan operation

I Priority watch types

I Priority watch operation

I Tone/DTCS squelch operation

ting

I DTCS polarity setting

tone scan

set mode

I Set mode items

I Antenna selection

I Weather channel operation

i data cloning

I Auto power-off function

other functions

I Partial reset

I General

I TV channels

frequency table

I Weather channels

other communications in the usa

I Other communications— other countries

MAINTENANCE

SPECIFICATIONS

frequency range

belt clip

basic operation

programmed scan operation

Front, top and side panels

Function display

Battery installation

Caution

Mode selection

Operating band selection

Setting a tuning step

frequency and channel setting

Receive mode selection

Setting audio volume

Squelch level setting

Attenuator function

Duplex operation

AFC function

Band scope

DIAL] function assignment

Band exchange

Memory channel programming

Memory bank setting

Memory bank selection

Programming memory/bank name

Selecting memory/bank name indication

Copying memory contents

Memory clearing

Erasing/transferring bank contents

Scan types

Full/band/programmed scan

Scan edges programming

Memory/bank/all bank scan

Auto-memory write scan

Skip channel/frequency setting

Scan resume condition

Priority watch types

Priority watch operation

priority watch

Tone/DTCS squelch operation

dtcs polarity setting

General

Set mode items

Antenna selection

Weather channel operation

Data cloning

Partial reset

Data format

control command

VHF marine channels

Other communications in the USA

troubleshooting

OPTIONS

driver installation

POCKET GUIDE

parts list

PARTS LIST

BOARD LAYOUTS

VOLTAGE DIAGRAM

UNIT LAYOUTS


Contents service manual Table Of Contents specifications bottom view logic unit disassembly instructions receiver circuits pll circuits other circuits power supply circuits software adjustments main unit explanatory notes disassembly information bc-156 voltage diagram bc-156 board layouts	1F1CP1CP2CP3CP4CP5CP6J4CHGOUTCHGOUTDET2BATT–DET1BATT+SWCONTTHD19to TANSHI BOARD J1J1THDCONT5VBATT+DET1BATT–DET2CHGOUTCHGOUT91to BC-156MAIN UNIT J412 - 312-4 BC-156 BOARD LAYOUTS• MAIN UNIT (TOP VIEW)• TANSHI BOARD (TOP VIEW) Previous Next / 70