Sharp LC-13S2US, Service Manual

Page: 44 / 94

LC-15S2U-S
44
TROUBLE SHOOTING TABLE
(Continued)
Check all the settings on the microprocessor
s adjust process menu.
No picture
No picture at all
Yes
No
Check IC1201 its peripheral circuits and the LCD panel. Check IC801 and its peripheral circuits.
Yes
No No
No VIDEO 1 or 2 output
Yes
No
Are input and output of IC3401, IC3402 as specified?
Check IC3401, IC3402 and its peripheral parts.
No
Are inputs at Pin (1
18) of
IC801
Check IC801 V1_V line and their peripheral parts.
Yes
Check IC802 and its peripheral parts.
No
Are inputs and outputs of IC802 as specified?
No
Check pins (48), (47) and (54) of IC2001.
No S VIDEO 1 or 2 output
Yes
Yes Yes
Yes
Are input and output of IC3402 and IC3401 as specified?
No
No No
Check SC341
1,
SC3412 SY line, SC line and peripheral parts.
No COMPONENT output
No
Are inputs at pins (108), (1
16) and (1
18)
of IC801 as specified?
Check J3404, Y
-I, Pb-I, Pr-I
and peripheral parts.
No TV output
Yes
No
Are voltages at Pins (6), (7) and (9) of tuner as specified?
Check the power line.
Yes
No
Is output at Pin (19) of tuner as specified?
Check the tuner and its peripheral
No
Is input at Pin (5) of
IC3402
as specified?
Check the line in question.
No Yes
No
Is Pin (4) of IC3402
a
t
H?
Is Pin (48) IC2001 at
H ?
Yes
Check the line in question.
Check pins (51), (88) of IC2001 or the SSW
,
SSW2 line.
Are inputs and outputs of IC801 as specified?
Does the LCD controller test pattern appear?
Does the video decoder test pattern appear?
No
Are inputs at Pins (131), (132) and (133) of IC1201 as specified?
No No
Check P1201 YP
line, Pb-P
,
Pr-P
line and
peripheral parts.
Check C815
Check J3404,
Y
-P
, Pb-P
, Pr-P
and peripheral parts. Check QCNW
-
B535WJZZ
Is input at Pin (6) of IC804 as specified?
Is an error message displayed? Is the progressive input coming?
Out-of-support message "Y
es"
Check IC3402 and its peripheral parts.
Check IC3402 and its peripheral parts.
Are inputs at Pins (1
16) and
(1
18) of IC801
as specified?