Sharp PG-MB56X Service Manual page 38

PG-MB56X/PG-MB66X/XG-MB55X-L/XG-MB65X-L/XG-MB67X-L
S-VIDEO (INPUT 3)
check
Send S-Video signal (color
signal) from INPUT 3.
Select INPUT 3 using keys
on the main unit or the
remote control.
Is image displayed
normally?
NO
Is image displayed in black
and white?
NO
Is S-VIDEO signal (Y) sent
to R3306?
YES
Is 1.8 V applied to
TL3358?
YES
Is 3.3 V applied to
TL1792?
YES
Is 1.5 V applied to
TL1762?
YES
Check IC3351 and
peripheral circuits.
YES
End
Check S-VIDEO terminal
YES
and peripheral circuits of
Q3311.
Check S-VIDEO terminal
NO
and peripheral circuits of
Q3301.
End
Check VIDEO terminal and
peripheral circuits of
Q3321.
NO
Check IC3352 and
peripheral circuits.
NO
Check IC1792 and
peripheral circuits.
NO
Check IC1763 and
peripheral circuits.
5 – 9
VIDEO (INPUT 4) check
Send VIDEO signal from
INPUT 4. Use buttons on
the main unit or the remote
control to select INPUT 4.
YES Is image displayed
normally?
NO
NO
Is VIDEO signal sent to
C3326?
YES