Icom IC-725 Service Manual page 2

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.