Icom IC-725 Instruction Manual page 28

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
888
88.88
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.