Read Sharp LC-15L1E (serv.man8) Service Manual online
20
LC-15L1E
TROUBLE SHOOTING TABLE
(Continued)
No picture (1/2)
No picture at all
No picture f
or
TV
No picture f
or
Video 1
No picture f
or
Video 2
Chec
k that micr
ocomputer adjustment pr
ocess men
u
is set correctl
y
.
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
No SCAR
T R/G/B
NO
NO
YES
YES
YES
YES
YES
No picture f
or
Video 3
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
No picture (2/2)
Chec
k that micr
ocomputer adjustment pr
ocess men
u is set correctl
y
.
NO
NO
No colour
No colour f
or
TV
No colour f
or
Video 2
No colour f
or
Video 3
No colour f
or
Video 1
No colour f
or
Video 4
Chec
k that micr
ocomputer adjustment pr
ocess men
u
is set correctl
y
.
NO
No picture f
or
TV
, Video
1,
Video 2 and
Video 3
No picture
Is IC801
I/O
nor
mal?
Is IC1201
I/O
nor
mal?
Chec
k LCD panel
voltage and w
a
ve
fo
rm
.
Chec
k
IC801 and
per
ipher
y.
Are inputs
at pins (2),
(3) and (4)
of IC5408
normal?
Are inputs
at pins (1),
(2), (3) and
(79) of
IC5401
nor
mal?
Chec
k outputs
at pins (40),
(39), (38), (37),
(34), (33), (32)
and (31)
of IC5401.
Chec
k
IC5408 and
per
ipher
y.
Is IC5402
I/O
normal?
Is input at
pin (73) of
IC5401
nor
mal?
Chec
k
IC5402 and
per
ipher
y.
Chec
k
po
w
er line
.
Chec
k
rele
v
ant
line
.
Chec
k
rele
v
ant
line
.
Is input at
pin (7) of
IC5402
nor
mal?
Chec
k
rele
v
ant
line
.
Is input at
pin (12) of
IC5402
nor
mal?
Are inputs
at pins (72)
and (73) of
IC801
nor
mal?
Chec
k SY
line
, SC line
and
per
ipher
ies
.
Chec
k
IC5402 and
per
ipher
y.
Is IC5402
output
nor
mal?
Chec
k
IC5402 and
per
ipher
y.
Is IC5402
output
nor
mal?
Chec
k
IC5402 and
per
ipher
y.
Is IC5402
output
nor
mal?
Chec
k
tuner and
per
ipher
y.
Is input at
pin (9) of
IC5402
nor
mal?
Chec
k
rele
v
ant
line
.
No
Video 1 output
fr
om SCAR
T1
Is output at pin (5)
of IC5202 nor
mal?
Chec
k IC5202 and
its per
ipher
y.
Is output at pin (4)
of IC5202 nor
mal?
Chec
k IC5202 and
its per
ipher
y.
NO
Is output at pin (19)
of SCAR
T nor
mal?
Chec
k rele
v
ant line
.
NO
Is output at pin (40)
of SCAR
T nor
mal?
Chec
k rele
v
ant line
.
No
Video 2 output
fr
om SCAR
T2
Chec
k
IC5402 and
per
ipher
y.
Are v
oltages
at pins (1),
(13) and (15)
of tuner
nor
mal?
Is output at
pin (23) of
tuner nor
mal?
Is IC5402
output
nor
mal?
Check
relevant line.
Is input at
pin (47) of
IC5402
nor
mal?
Chec
k
rele
v
ant
line
.
Chec
k
IC5401 and
per
ipher
y.
Chec
k
IC1201 and
per
ipher
y.
Is IC801 input nor
mal?
Chec
k IC801 and per
ipher
y.
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