Icom IC-M422 Service Manual - page 2
INTRODUCTION
REPAIR NOTES
This service manual describes the latest service information
for the IC-M422 VHF MARINE TRANSCEIVERat the time
of publication.
DANGER
NEVER connect the transceiver to an AC outlet or to a DC
power supply that uses more than 16 V. Such a connection
could cause a fire or electric hazard.
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 trans-
ceiver'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>
5030002790 LCD
A0286
IC-M422
Main unit 5 pieces
8810009510 Screw BO 2x4 NIxZU (BT) IC-M422
Chassis 10 pieces
Addresses are provided on the inside back cover for your
convenience.
1. Make sure 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 turning 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 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 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.
MODEL
COLORS
SYMBOL
IC-M422
BLACK
[BLK]
SUPER WHITE
[SW]
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