Icom IC-F2721 Service Manual page 2

INTRODUCTION
This service manual describes the latest service information
for the IC-F2721/D/F2710/F2821/D/F2810 UHF MOBILE
TRANSCEIVER at the time of publication.
6 versions of the IC-F2721 have been designed. This
service manual covers each version.
MODEL VERSION
IC-F2721D USA-02, USA-03, USA-04, USA-05
IC-F2721 USA-06, USA-07
IC-F2710 EUR-02, EUR-03, GEN-02, GEN-03
IC-F2821D USA-02, USA-03, USA-04, USA-05
IC-F2821 USA-06, USA-07
IC-F2810 EUR-02, EUR-03, GEN-02, GEN-03
To upgrade quality, any electrical or mechanical parts and
internal circuits are subject to change without notice or
obligation.
IC-F2700 Series
IC-F2800 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>
1130011600 S.IC TA31136FN IC-F2721D MAIN UNIT
8820001210 Screw 2438 screw IC-F2721 Chassis
Addresses are provided on the inside back cover for your
convenience.
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.
10 KEY TX power DO NOT reverse the polarities of the power supply when
connecting the transceiver.
45 W
None
DO NOT apply an RF signal of more than 20 dBm (100mW)
25 W
to the antenna connector. This could damage the trans-
ceiver's front end.
45 W
Yes
25 W
1. Make sure a problem is internal before disassembling
2. DO NOT open the transceiver until the transceiver is
3. DO NOT force any of the variable components. Turn
4. DO NOT short any circuits or electronic parts. An
5. DO NOT keep power ON for a long time when the
5 pieces 6. DO NOT transmit power into a signal generator or a
12 pieces
7. ALWAYS connect a 40 dB to 50 dB attenuator between
8. READ the instructions of test equipment thoroughly
DANGER
REPAIR NOTES
the transceiver.
disconnected from its power source.
them slowly and smoothly.
insulated turning tool MUST be used for all adjustments.
transceiver is defective.
sweep generator.
the transceiver and a deviation meter or spectrum
analyzer when using such test equipment.
before connecting equipment to the transceiver.