Icom IC-R8500 Service Manual page 2

INTRODUCTION
DANGER
This service
manual
describes the
latest
service information
for
the
IOR8500
COMMUNICATIONS RECEIVER
at
the time of
pubiication.
VERSION
NO.
VERSION
SYMBOL
#02
U.S.A.
USA
#03 Europe
EUR
#05 France
FRA
To
upgrade
quality,
any
electrical
or
mechanical
parts
and
internal circuits
are subject
to
change
without notice or
obligation.
NEVER
connect
the receiver to
an
AC
outlet
or
to
a
DC
power
supply
that
uses
more
than 16
V.
This
will ruin
the receiver.
DO NOT
expose
the receiver
to rain,
snow
or
any
liquids.
DO NOT
reverse the
polarities of
the
power
supply
when
connecting the
receiver.
DO NOT
apply an
RF
signal
of
more
than
20
dBm
(100
mW)
to
the
antenna
connector. This could
damage
the receiver's
front
end.
ORDERING PARTS
REPAIR
NOTES
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
cSAMPLE ORDER>
1130007700
S.iC
BU4094BCF
IC-R8500 PLL UNIT
5[>ieces
8810009030 Screw
OHM3x8ZK
IC-R8500 Topcover
lOpieces
Addresses are provided on the
inside
back cover
for
your
convenience.
1
.
Make
sure a problem
is
internal
before disassembling the
receiver.
2.
DO NOT
open
the receiver
until
the receiver
is
disconnected from
its
power
source.
3.
DO NOT
force
any
of
the variable
components.
T
urn
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 receiver
is
defective.
6.
READ
the instructions of test
equipment
thoroughly before
connecting
equipment
to
the
receiver.