Icom IC-24AT Service Manual page 2

INTRODUCTION
This service
manual
describes Ihe
latest
service information
for
the
lC-24ATyET
DUAL
BAND FM TRANSCEIVER
at
the time
of publication.
VERSION
NUMBER
VERSION
MODEL
FREQUENCY RANGE
VHF
UHF
#02
U.K.
UK
1
44-'
146
MHz
#03
Europe
EUR
144"146
MHz
430-440 MHz
#04
Jtafy ITA
144'14B
MHz
430-440 MHz
#05
U,S.A
USA 144-148
MHz
440-450
MHz
#07
Australia
AUS
144-148
MHz
430-440 MHz
#09
I
Asia
SEA
144-148
MHz
430-440
MHz
DANGER
NEVER
connect the transceiver
to
an
AC
outlet
or
to
a
DC
power
supply
that
uses
more than 16V, 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.
ORDERING PARTS
Be
sure
to
include the following four points
when
ordering replacement
parts:
1
.
1
0-d
ig
it
order
n
umbers
2.
Component
part
number
and
name
3.
Equipment model
name
and
unit
name
4.
Quantity required
<SAMPLE
ORDER>
11S0000550
1C
RH5VA37CA-T1 I024AT LOGIC
UNIT
5
pieces
881
D005720 Screw PH
BO
MS
X
20
2K I024AT
Rear panel 10 pieces
Addresses
are provided
on
the inside
back cover
for
your convenience.
REPAIR
NOTE
1
.
Make
sure a problem
is
interral
before disassembling the
transceiver.
2
.
DO NOT
open
the transceiver
untN 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.
An
Insulated tuning tool
MUST
be used
for
all
adjustments.
6.
DO NOT
keep power
ON
for
a
long
tirne
when
the transceiver
is
detective.
6.
DO NOT
transmit
power
into
a
signal
generator
or
sweep
generator.
7.
ALWAYS
connect
a
30 dB^40 dB
attenuator
between
the transceiver and
a deviation
meter
or
spectrum
anafyier
when
using
such
test
equipment,
5.
READ
the instructions
of test
equipment
thoroughly before connecting the
equipment
to
the transceiver.