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3.
Find out the
short-circuit
parts on
the AC. input.
a.
Disconnect
the
lead
wire
of
the
power transformer
which
is soldered
at
the
position
of
BR3
and BL3
on
the
noise
filter
board.
(Fig.22l.
lf
it
shows
oO,
replace
the
power
transformer
with
a
new one.
lf
the
power
transformer
is
working correctly,
check
the
resistance
between
BLl
and
BR2 on
the
noise
filter
board.
lf
the indicator
shows
-C),
replace
the
noise
filter
board
with
a
new
one.
lf
the
noise
filter
board
is
working correctly,
check
the
resistance
between
BRl
and
BLl.
As
for
AC100V, AC115V
and
AC127V input
specifications, check the
resistance
between
the pin
of
the AC. inlet and
BR1.
lf
the
indicator
show
-O,
when
turning
on
and
off
the
power switch,
replace
the
power
switch
with
a
new
one.
5.
The
pilot
lamp
does
not
light
and
the
buzzer does
not
make
a
sound
but the
ready lamp is
lit.
There
are
no defects on the AC.
input
except
the
output
orange
cords
of the connector
S9
of the
power
transformer.
Check
the
voltage
between
the two
orange
cords
of
the
connector
Sg.
(Fig.
18).
lf
the
voltage
is AC.
12.6V
t
1Oo/o,
there
are
no
defects
on the
power
transformer
but
some
defects on
the
power
supply
board.
Replace
the
power
supply
board
with
a
new
one.
lf
not
12.6V
!
1oo/o,
there
are some
defects on
the
power
transformer.
Replace
the
power
transformer
with
a
new
one.
3-5. Checking
the fuse (F601).
The fuse
(F601)
is installed on the
noise
filter
board
which
is
in the lower
side
plate (R)
assembly.
The
capacity
of
the
fuse
is
different
according
to
the
rated voltage.
Replace
the
fuse
by
referring
to
the indication
on
the
noise
filter
board.
100V-
115V
inputspec. . . .
.
. . .lAFuse.
127Vinputspec. . . . .
.
.
.0.8A
Fuse.
22OV
-
240V
inputspec. .
.
. .
.
.
.0.5A
Fuse.
After
replacing
the
fuse,
find
and repair
the
cause
of
the
defects.
Then,
turn
on
the
power
switch.
lf
the
fault
is
still
present
the
fuse
will
be
broken
again.
b.
A1
ta
afa
*o
ca
A1
ta
IG
aa
,c
ta
A1
AE
ta
,a
ta
ta
4A
ta
,a
*o
ta
ffi
AA
gt
a
ca
ta
*a
ta
IG
,a
*a
,a
la
3A
ta
ca
la
BA
&
ta
9A
,fi
m
ta
,a
ta
&
ta
ta
ta
AA
4A
ta
qa
ta
ta
9A
la
8A
4A
aa
4.
b.
Set
the
tester
to
the
S/
x
1 range.
Check
the
resistance
between
both
lead
wires
lf it
shows
0O,
there
is
a
short-circuit
on
transformer.
Replace
the
power
transformer
with
a
new one.
lf
it
shows
10Q, the
power
transformer
is
working correctly.
c.
Check
the
resistance
between
the
soldered face
of
BR3 and BL3.
The indicator
shows
-C2.
lf it
shows
0O,
take
off
the
fuse
(F601)
and check
the
resistance between
them
again.
lf
the indicator
shows
-Sl,
the
noise
filter
board
is
working correctly.
lf
it
shows
0O,
replace
the
noise
filter
board
with
a
new
one.
.
lf
the
noise
filter
board
is
working correctly,
check
the
lead
wire
of
the
AC.
input
and power
switch.
Locate
the
disconnected parts on
the AC. input.
a.
Set
the
tester
to
the
S2
x
1 range.
Check
the
resistance
between BR3 and
BL3
on
the
noise
filter
board.
The
lead wires
of
the
power transformer are
soldered
to
BR3 and
BL3.
lf
the
indicator
of
the
tester shows 10O,
the
power transformer
is
working
correctly.
Fig.22
of
the
power transformer.
the winding
of
the
power
-14-
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