HF TRANCEIVERiC-78

RECEIVER CIRCUITS

TRANSMITTER CIRCUITS

PLL CIRCUIT

POWER SUPPLY CIRCUITS

PREPARATION BEFORE SERVICING

PLL ADJUSTMENT

TRANSMITTER ADJUSTMENTS

RECEIVER ADJUSTMENTS

SET MODE ADJUSTMENT

front unit

logic board

main unit

pll unit

filter unit

logic unit

MAIN UNIT

PLL UNIT

LOGIC UNIT

SENSOR BOARD

FILTER UNIT

Icom IC-78 Service Manualvice Man

LOGIC CIRCUITS

preparation before servicing

PLL ADJUSTMENTS

PHONE BOARD

IC-78

Front panel

Function display

Rear panel

PANEL DESCRIPTION ................................... 2

Unpacking

Required connections

Power supply connections

Advanced connections

INSTALLATION AND CONNECTIONS ......... 8

Selecting a channel

Frequency indication

Basic voice receive and transmit

Functions for transmit

vox operation

Functions for receive

Filter selection

Filter setting

Functions for CW

electronic cw keyer

Functions for RTTY

Channel comment programming

General

Quick set mode items

Initial set mode items

Instruction

channel programming

Tone alarm operation

Opening the transceiver's case

CR-338 HIGH STABILITY CRYSTAL UNIT

Troubleshooting

Fuse replacement

CI-V remote control

Data cloning between transceivers

SPECIFICATIONS

explicit definitions

PANEL DESCRIPTION

n Function display

n Rear panel

d acc socket information

n Microphone (HM-36)

INSTALLATION AND CONNECTIONS

n Required connections

n Power supply connections

n Advanced connections

n External antenna tuners

OPERATION

n Frequency indication

n Basic voice receive and transmit

n Functions for transmit

n Functions for receive

meter peak hold

n Filter selection

n Filter setting

n Functions for CW

cw pitch control

n Functions for RTTY

n Channel comment programming

SET MODE

n Quick set mode items

n Initial set mode items

EXTRA FEATURES

n 2-Tone alarm operation

n Opening the transceiver's case

n Optional IF filters

MAINTENANCE

n Fuse replacement

REMOTE JACK INFORMATION

n Data cloning between transceivers

OPTIONS


Contents Table Of Contents RECEIVER CIRCUITS TRANSMITTER CIRCUITS PLL CIRCUIT POWER SUPPLY CIRCUITS PREPARATION BEFORE SERVICING PLL ADJUSTMENT TRANSMITTER ADJUSTMENTS RECEIVER ADJUSTMENTS SET MODE ADJUSTMENT front unit logic board main unit pll unit filter unit logic unit MAIN UNIT PLL UNIT LOGIC UNIT SENSOR BOARD FILTER UNIT filter unit pll unit	HF TRANCEIVERiC-78 Next / 56