INTRODUCTION
This service manual describes the latest service information
for the
IC-91A
VHF/UHF FM TRANSCEIVER
, IC-91AD
VHF/UHF DIGITAL TRANSCEIVER
at the time of
publication.
ORDERING PARTS
Be sure to include the following four points when ordering
replacement parts:
1. 10-digit Icom parts number
2. Component name and informations
3. Equipment model name and unit name
4. Quantity required
<
SAMPLE ORDER
>
5030002880 LCD
HLM7972-010100 IC-91A
Main unit 5 pieces
8810009560 Screw PH BT M2
×
6 ZK
IC-91A
Chassis 10 pieces
Addresses are provided on the inside back cover for your
convenience.
REPAIR NOTES
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. 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
VERSION
SYMBOL
IC-91AD
U.S.A.
USA
Export
EXP
IC-91A
U.S.A.
USA-1
Taiwan
TPE
Korea
KOR
Australia
AUS
Export
EXP-1
EXP-2
Icom, Icom Inc. and logo are registered trademarks of Icom Incorporated (Japan) in the United States, the United
Kingdom, Germany, France, Spain, Russia and/or other countries.
NEVER
connect the transceiver to an AC outlet or to a DC
power supply 3.7 V. Such a connection could cause a fire or
electric hazard.
DO NOT
expose the transceiver to rain, snow or any liquids.
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.
CAUTION