Table of Contents
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INTRODUCTION
This service manual describes the latest technical
information for the IC-F4001/IC-F4002/IC-F4003/IC-F4006/
IC-F4008 UHF TRANSCEIVERS at the time of publication.
MODEL
VERSION
USA-11
USA-12
IC-F4001
USA-13
EUR-21
EUR-22
EUR-23
IC-F4002
UK-01
UK-02
UK-03
EXP-11
EXP-12
EXP-13
EXP-21
EXP-22
EXP-23
IC-F4003
EXP-01
EXP-03
EXP-31
AUS-21
AUS-22
AUS-23
RUS-21
IC-F4006
RUS-22
RUS-23
IC-F4008
CHN-31
To upgrade quality, any electrical or mechanical parts
and internal circuits are subject to change without notice
or obligation.
ORDERING PARTS
Be sure to include the following four points when ordering
replacement parts:
1. 10-digit Icom part number
2. Component name
3. Equipment model name and unit name
4. Quantity required
<ORDER EXAMPLE>
1110003491 S.IC
TA31136FNG IC-F4001
8820001210 Screw 2438 screw
Addresses are provided on the inside back cover for your
convenience.
Icom, Icom Inc. and the Icom logo are registered trademarks of Icom Incorporated (Japan) in Japan, the United States, the
United Kingdom, Germany, France, Spain, Russia and/or other countries.
CHANNEL
FREQUENCY
SPACING
RANGE
(kHz)
(MHz)
12.5/25.0
12.5/20.0/25.0
400–470
12.5/25.0
MAIN UNIT
5 pieces
IC-F4003
Top cover
10 pieces
CAUTION
NEVER connect the transceiver to an AC outlet or to a DC
power supply that uses more than the specified voltage.
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 (100 mW) to
the antenna connector. This could damage the transceiver's
front-end.
REPAIR NOTES
1. Make sure that 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.
insulated tuning 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 Standard Signal
Generator or a Sweep Generator.
7. ALWAYS connect a 50 dB to 60 dB attenuator between
the transceiver and a Deviation Meter or Spectrum
Analyzer when using such test equipment.
8. READ the instructions of the test equipment throughly
before connecting it to the transceiver.
(IC-F4001)
An
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Table of Contents
Need help?
Do you have a question about the IC-F4001 and is the answer not in the manual?
Questions and answers
ptt pressed but not tx
The Icom IC-F4001 may not be transmitting when the PTT is pressed due to several possible reasons:
1. Transmit Inhibit Function – Transmission is restricted if:
- The channel is muted (PMR operation only).
- The channel is busy.
- A signal with an unmatched (or matched) CTCSS or DTCS tone is received.
- The selected channel is a "receive only" channel.
2. Time-Out Timer – If the transceiver has been transmitting continuously beyond the pre-programmed time limit, the time-out timer activates and stops further transmission.
3. Penalty Timer – After the time-out timer activates, the penalty timer may further inhibit transmission for a set period.
4. Power Supply Issues – If the transceiver is connected to a power supply with incorrect voltage or reversed polarity, it may not function properly.
5. Antenna Damage – If an RF signal stronger than 20 dBm (100 mW) was applied to the antenna connector, the transceiver’s front-end could be damaged, affecting transmission.
Checking these factors can help identify and resolve the issue.
This answer is automatically generated
Q73 trasistor does not work when PTT pressed but software is ok