REPAIR NOTES
1. Make sure a problem is internal before disassembling
the transceiver.
2. DO NOT open the transceiver until the transceiver is
disconnected from its power source.
3. DO NOT force any of the variable components. Turn
them slowly and smoothly.
4. DO NOT short any circuits or electronic parts. An
insulated tuning tool MUST be used for all adjustments.
5. DO NOT keep power ON for a long time when the
transceiver is defective.
6. DO NOT transmit power into a signal generator or a
sweep generator.
7. ALWAYS connect a 50 dB or 60 dB attenuator between
the transceiver and a deviation meter or spectrum
analyser when using such test equipment.
8. READ the instructions of test equipment thoroughly
before connecting equipment to the transceiver.
To upgrade quality, all electrical or mechanical parts
and internal circuits are subject to change without
notice or obligation.
DANGER
NEVER
connect the transceiver to an AC outlet or to a DC
power supply that uses more than 16 V. This will ruin the
transceiver.
DO NOT
expose the transceiver to rain, snow or any liq-
uids.
DO NOT
reverse the polarities of the power supply when
connecting the transceiver.
DO NOT
apply an RF signal of more than 20 dBm (100
mW) to the antenna connector. This could damage the
transceiver’s front end.
ORDERING PARTS
Be sure to include the following four points when ordering
replacement parts:
1. 10-digit order numbers
2. Component part number and name
3. Equipment model name and unit name
4. Quantity required
<SAMPLE ORDER>
1110004080 S.IC
µ
PC2709T
IC-78 MAIN UNIT 1 piece
8810009130 Screw PH B0 M3
×
12 NI-ZU IC-78 CHASSIS
6 pieces
Addresses are provided on the inside back cover for your
convenience.
INTRODUCTION
This service manual describes the latest service information
for the IC-78 HF TRANSCEIVER at the time of publication.
Commercial
Commercial (w/alarm)
Marine
Marine (w/alarm)
OTH
OTH-1
OTH-2
OTH-3
#01
#02
#03
#04
SYMBOL
VERSION
VERSION NO.
