Icom IC-M23 Service Manual page 2

INTRODUCTION
This service manual describes the latest technical
information for the IC-M23 and IC-M24 VHF MARINE
TRANSCEIVER, at the time of publication.
MODEL VERSION
USA
IC-M24
EXP
CHN
EUR-1
EUR
IC-M23 UK
FRG
HOL
AUS
To upgrade quality, any electrical or mechanical parts
and internal circuits are subject to change without notice
or obligation.
CAUTION
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.
ORDERING PARTS
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
8820001210 Screw 2438 screw
Addresses are provided on the inside back cover for your
convenience.
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.
TRANSMIT SUPPLIED
POWER CHARGER
5 W BC-199SA
5 W
5 W
BC-199SE
5 W
5 W
5 W –
5 W (1 W)
BC-199SE
5 W
5 W BC-199SV
MAIN UNIT 5 pieces
IC-M24 Top cover 10 pieces
REPAIR NOTES
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 shor t any circuits or electronic par ts. 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.
(IC-M24)