Icom HM-169 Service Manual page 2

INTRODUCTION
This service manual describes the latest service information
for the HM-169/HM-174 SPEAKER MICROPHONE and
HM-170GP/HM-175GPS GPS SPEAKER MICROPHONE
at the time of publication.
MODEL GPS
HM-169
N/A
HM-174
HM-170GP
Yes
HM-175GPS
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UNIT ABBREVIATIONS:
SW=SW UNIT
M=MAIN-A/B UNIT
(HM-175GPS)
ORDERING PARTS
Be sure to include the following four points when ordering
replacement parts:
1. 10-digit Icom parts numbers
2. Component name
3. Equipment model name and unit name
4. Quantity required
<ORDER EXAMPLE>
1110006490 S.IC LMV321IDCKR HM-175GPS MAIN-A UNIT 1 piece
Addresses are provided on the inside back cover for your
convenience.
To upgrade quality, any electrical or mechanical parts and
internal circuits are subject to change without notice or
obligation.
REPAIR NOTES
1. Make sure the problem is internal before disassembling
the speaker microphone.
2. DO NOT open the speaker microphone 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
speaker microphone is defective.
6. READ the instructions of test equipment throughly
before connecting a test equipment to the speaker
microphone.