Icom IC-F1721/D Service Manual page 2

INTRODUCTION
This service manual describes the latest service information
for the IC-F1721/D/F1710/F1821/D/F1810 VHF MOBILE
TRANSCEIVER at the time of publication.
6 versions of the IC-F1721 have been designed. This service
manual covers each version.
MODEL VERSION
IC-F1721D USA-02, USA-03
IC-F1721 USA-04
IC-F1710 EUR-02, GEN-02
USA-02, USA-03
IC-F1821D
IC-F1821 USA-04
IC-F1810 EUR-02, GEN-02
To upgrade quality, any electrical or mechanical parts and
internal circuits are subject to change without notice or
obligation.
IC-F1700 series
IC-F1800 series
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>
1110003490 S.IC TA31136FN
8820001210 Screw 2438 screw
Addresses are provided on the inside back cover for your
convenience.
Icom, Icom Inc. and
Germany, France, Spain, Russia and/or other countries.
10 KEY TX power
50 W
None
25 W
50 W
Yes
25 W
IC-F1721 MAIN UNIT 5 pieces
IC-F1721 Chassis 12 pieces
are registered trademarks of Icom Incorporated (Japan) in the United States, the United Kingdom,
DANGER
NEVER connect the transceiver to an AC outlet or to a DC
power supply that uses more than 16 V. This will ruin the
transceiver.
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 (100mW)
to the antenna connector. This could damage the trans-
ceiver's front end.
REPAIR NOTES
1. Make sure a problem is internal before disassembling the
transceiver.
2. DO NOT open the transceiver until the transceiver is dis-
connected 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 insulat-
ed turning tool MUST be used for all adjustments.
5. DO NOT keep power ON for a long time when the trans-
ceiver is defective.
6. DO NOT transmit power into a signal generator or a
sweep generator.
7. ALWAYS connect a 40 dB to 50 dB attenuator between
the transceiver and a deviation meter or spectrum ana-
lyzer when using such test equipment.
8. READ the instructions of test equipment thoroughly
before connecting equipment to the transceiver.