Icom IC-725

3
MAINTENANCE
AND
ADJUSTMENT
8-2
FUSE
REPLACEMENT
If
the
fuse
blows or the transceiver
stops functioning,
find
the
source
of the problem if
possible,
and replace the
damaged fuse
with
a
new, rated fuse.
CAUTION:
Disconnect the
DC power
cable from
the
DC POWER
SOCKET on
the rear
panel
when changing
the fuse.
DC power cable fuses
20A
Circuitry fuse
F.G.M.B.
125 V,
4
A
•
DC
LINE
FUSE REPLACEMENT
•CIRCUITRY
FUSE
REPLACEMENT
The fuse
is installed in
the PA
UNIT.
12 V
of
DC
power
are applied
to the
circuitry in
the
IC-725
through
the DC line fuse
and
the PA
circuit.
See
p.
24 before removing
the
IC-725 covers.
8-3
CPU RESETTING
The
FREQUENCY
DISPLAY
may
occasionally
display
erroneous
information,
e.g.,
when
first
applying power.
This may be
caused externally
by
static
electricity or
other
factors.
If this problem
occurs, turn
the
[POWER]
switch OFF.
Wait
a
few
seconds,
and then turn
ON power
again. If the
problem continues,
perform
the following
procedure:
NOTE:
CPU
resetting
clears all
memory
information.
1
)
Turn the [POWER]
switch OFF.
2)
Push
and hold
the
[FUNC] and [MW]
switches,
and
push the [POWER]
switch
IN.
•
All information
is displayed
for
a couple
seconds then
14.1000
MHz
is displayed.
[scan]
LSBUSBCW-NAMFM
UIUIrjncJ
MEMO
TUNE
ITHRUI
88888.88
Ml 38
3)
Release switches.
The CPU
is now reset.
8-4
CPU BACKUP BATTERY
The
IC-725 has
a
lithium
backup
battery for retaining
memory
information.
The usual life of the
backup battery
is approximately five
years.
When
the battery
is exhausted, the transceiver
transmits and
receives normally but
the transceiver cannot
retain
memory
information.
NOTE:
Backup battery
replacement should
be done by
an
authorized
Icom Dealer or Service Center.
8-5
CLEANING
If the
transceiver
becomes dusty or dirty, wipe
it
clean with
a
dry,
soft cloth.
Avoid the use of
strong
cleaning agents
such
as
benzine
or
alcohol
as
they
may
damage the surfaces
of
the transceiver.