This service manual describes the latest technical
information for the IC-M23 and IC-M24 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 the specified voltage.
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
TRANSMIT
POWER
SUPPLIED
CHARGER
IC-M24
USA 5 W BC-199SA
EXP 5 W
BC-199SE
IC-M23
CHN 5 W
EUR-1 5 W
EUR 5 W
UK 5 W –
FRG 5 W (1 W)
BC-199SE
HOL 5 W
AUS 5 W BC-199SV
Be sure to include the following four points when ordering
replacement parts:
1. 10-digit Icom part number
2. Component name
3. Equipment model name and unit name
4. Quantity required
<ORDER EXAMPLE>
1110003491 S.IC TA31136FNG IC-M23 MAIN UNIT 5 pieces
8820001210 Screw 2438 screw IC-M24 Top cover 10 pieces
Addresses are provided on the inside back cover for your
convenience.
ORDERING PARTS
1. Make sure that the problem is internal before dis-
assembling 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 Standard Signal Generator
or a Sweep Generator.
7. ALWAYS connect a 30 dB to 40 dB attenuator between
the transceiver and a Deviation Meter or Spectrum
Analyzer, when using such test equipment.
8. READ the instructions of the test equipment throughly
before connecting it to the transceiver.
REPAIR NOTES
INTRODUCTION
CAUTION
(IC-M24)
Icom, Icom Inc. and the Icom logo are registered trademarks of Icom Incorporated (Japan) in Japan, the United States, the
United Kingdom, Germany, France, Spain, Russia and/or other countries.
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