Sharp XG-MB67X, Service Manual

Page: 38 / 128

XG-MB67X
8 – 10
S-VIDEO (INPUT 3)
check VIDEO (INPUT 4)
check
Send S-Video signal
(color signal) from
INPUT 3. Select INPUT
3 using keys on the
main unit or the remote
control. Send VIDEO signal from
INPUT 4. Use buttons
on the main unit or the
remote control to select
INPUT 4.
Is image displayed nor-
mally? YES End Is image displayed nor-
mally? YES End
NO NO
Is image displayed in
black and white? YES Check S-VIDEO ter-
minal and peripheral
circuits of Q3311. Is VIDEO signal sent to
C3326? NO Check VIDEO termi-
nal and peripheral cir-
cuits of Q3321.
NO YES
Is S-VIDEO signal (Y)
sent to R3306? NO Check S-VIDEO ter-
minal and peripheral
circuits of Q3301. Is 1.8 V applied to
TL3358? NO Check IC3352 and
peripheral circuits.
YES YES
Is 1.8 V applied to
TL3358? NO Check IC3352 and
peripheral circuits. Is 3.3 V applied to
TL1792? NO Check IC1792 and
peripheral circuits.
YES YES
Is 3.3 V applied to
TL1792? NO Check IC1792 and
peripheral circuits. Is 1.5 V applied to
TL1762? NO Check IC1763 and
peripheral circuits.
YES YES
Is 1.5 V applied to
TL1762? NO Check IC1763 and
peripheral circuits. Check IC3351 and
peripheral circuits.
YES
Check IC3351 and
peripheral circuits.