Icom ic-775 Service Manual page 9

•
AC VOLTAGE SELECTION
i
A
WARNING:
DISCONNECT
the
AC
power
P
cable
from the transceiver
and
wait
a few minutes
^
before seiecting
an
AC
power
voltage.
The
regulator unit
in
the
IC-775/DSP can be switched
to
1
20
or
230
V
AC.
®
Remove
the
REG
unit
as described on
p.
2-1
.
(2)
Remove
the
16 screws
to
remove
the
internal
shield
cover
of
the regulator
unit.
(D
Unplug
the cable
as
shown
in
the
diagram
below, then
connect
it
to
the desired voltage
position.
@
Change
the
AC
fuse
to
an
appropriate one.
©
Replace
the
internal
shield
cover and
plug
in
the 3
power
connectors.
Replace
the regulator
unit,
then
check the
movement
of
the
[POWER]
switch.
Replace
the remaining
units,
covers
and
screws.
A
WARNING:
DO NOT
forget
to
change
the
AC
fuse
when you change
the
AC
input voltage.
An
incorrect fuse
may
pose a
fire
hazard.
-
12
A
FGMB
fuse
for
100-120
V
versions
-
5
A
high breaking capacity fuse
for
220-240
V
versions
•
BACKUP BATTERY REPLACEMENT
The
transceiver has a
lithium
backup
battery
on
the inside
of
the
front
panel
(MAIN
unit) for retaining
operating
conditions.
The
usual
life
of the
backup
battery
is
approxi-
mately
5
years.
When
the
backup
battery
is
exhausted, the transceiver
transmits
and
receives normally but
cannot
retain
oper-
ating
conditions
except
for
memory
channels.
P
CAUTION:
If
the lithium battery
is
incorrectly re-
P
placed,
it
could explode. Replace with a
CR-2032
or
p
equivalent type.
®
Remove
the top
and bottom covers as
described
on
p.
2-1.
®
Remove
8 screws from
the front
panel
as shown
in
figure
1
at right.
@
Remove
the
front
panel.
®
Replace
the
backup
battery
as
shown
in
figure
2
at
right.
®
Reassemble
the
front panel.
-
Check
that
the
[POWER]
switch
works smoothly.
®
Replace
the top
and bottom
covers.
P
CAUTION:
After replacing the lithium battery, turn
P power
ON
and OFF,
otherwise, the lithium battery
will
p
become
exhausted
rapidly.
Topside
:©
Bottom
side
:
©
(© terminal
is
visible after installation.)
(Fig.
2)
2-5