Icom IC-M412 Service Manual page 2

INTRODUCTION
This service manual describes the latest service information
for the IC-M412 VHF MARINE TRANSCEVER at the time of
publication.
MODEL VERSION
USA
IC-M412
USA-01
UNIT ABBREVIATIONS:
F R = F RO N T- A U N I T, L G - A = L O G I C - A U N I T,
MA-A= MAIN-A UNIT
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-M412
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.
COLOR MICROPHONE
Black HM-164B
White HM-164SW
MAIN-A UNIT 5 pieces
IC-M412 Top cover
NEVER connect the transceiver to an AC outlet or to a DC
power supply that uses more than specifed. 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.
1. Make sure the 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.
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
10 pieces
Generator or a Sweep Generator.
7. ALWAYS connect a 40 dB to 50 dB attenuator between
the transceiver and a Deviation Meter or Spectrum
Analyzer when using such test equipment.
8. READ the instructions of test equipment throughly
before connecting a test equipment to the transceiver.
CAUTION
(IC-M412) [USA-01]
REPAIR NOTES
An