Sharp LC-13C3US, Service Manual

Page: 29 / 88

29
LC-13C3U-S
LC-15C3U-S
TROUBLE SHOOTING TABLE
(Continued)
Chec
k all the settings on the microprocessor
’s adjust process men
u.
No picture
No picture at all
Yes
No
Are inputs and outputs of IC801 as specified?
Does the LCD controller test patter
n
appear?
Does the video decoder test patter
n
appear?
Chec
k IC3401
and its per
ipher
al
par
ts
.
Chec
k
IC1201, its per
ipher
al
circuits and the LCD panel. Chec
k IC801
and its per
ipher
al
circuits
.
Yes
No No
No VIDEO 1 or 2 output
No
Are inputs and outputs of IC3401 as specified?
Chec
k
IC3401 and its per
ipher
al
par
ts
.
Yes
Chec
k pin (88)
of IC2001,or chec
k SSW
line
.
No
Is input at Pin (73) of IC801 as specified?
Chec
k IC801,
A
V1 line and
their per
ipher
al
par
ts
.
Yes
No S VIDEO output
No
Are inputs at Pins (71) and (72) of IC801 as specified?
Chec
k
SC3405, SY line
, SC line
and per
ipher
al
par
ts
.
No COMPONENT output
No
Is input at Pins (4), (5), (6) and (75) of IC801 as specified?
Chec
k J3410,
D
VD-Y line
,
PB line
, PR
line and per
ipher
al
par
ts
.
No TV output
Yes
No
Are v
o
ltages
at Pins (6), (7) and (9) of tuner as specified?
Chec
k the
po
w
er line
.
No
Is output at Pin (19) of tuner as specified?
No
Chec
k the
tuner and its per
ipher
al
par
ts
.
Chec
k
the
line in question.
Yes
Is input at pin (47) of IC3401 as specified?
Yes
Chec
k IC3401
and its per
ipher
al
par
ts
.