This service manual describes the latest service information
for the
IC-M304
VHF MARINE TRANSCEIVER at the time
of publication.
NEVER
connect the transceiver to an AC outlet or to a DC
power supply that uses more than 15 V. This will ruin the
transceiver.
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.
To upgrade quality, any electrical or mechanical parts and
internal circuits are subject to change without notice or
obligation.
MODEL
VERSION
SYMBOL
COLOR
IC-M304
U.S.A.
[USA]
Black
[USA-01]
Super White
[USA-02]
Gray
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>
1110003491 S.IC
TA31136FNG IC-M304
MAIN UNIT
5 pieces
8820001210 Screw 2438 screw
IC-M304
CHASSIS
10 pieces
Addresses are provided on the inside back cover for your
convenience.
Icom, Icom Inc. and
logo are registered trademarks of Icom Incorporated (Japan) in the United States, the United
Kingdom, Germany, France, Spain, Russia and/or other countries.
ORDERING PARTS
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 to 60 dB attenuator between
the transceiver and a deviation meter or spectrum
analyzer when using such test equipment.
8.
READ
the instructions of test equipment thoroughly
before connecting equipment to the transceiver.
REPAIR NOTES
INTRODUCTION
CAUTION
