INTRODUCTION
DANGER
This
service manual
describes the latest service informa-
tion
for
the IC-725
HF ALL
BAND
TRANSCEIVER at the
time
of going to press.
If
you require
assistance or
further
information
regarding
the operation
and capabilities of the IC-725,
contact
your
nearest
authorized
loom
Dealer or Icom
Service
Center.
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
wrhen connecting the
transceiver.
DO NOT
apply an RF signal
of more than 20 dBm
(100
mV\/) to the
antenna
connector. This could
damage the
transceiver’s front
end.
ORDERING PARTS
REPAIR
NOTE
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>
1110001310
1C
^PC577HA IC-725 MAIN UNIT Spieces
8810005510 Screw
PHM3x6ZKBS
10725 Top cover
10
pieces
Addresses are provided on
the
inside back cover for your
convenience.
1. Make sure a
problem is internal
before disassembling
the transceiver.
2. DO NOT open
the transceiver until the
transceiver
is disconnected
from a 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
transceiver is defective.
6.
DO
NOT transmit power
into
a
signal generator
or
a sweep
generator.
7
ALWAYS
connect
a
40 dB~50 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.
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