Sharp TU-GD10U-T Service Manual page 47

TROUBLE SHOOTING TABLE
The picture of digital
broadcasting is not sent to the
monitor/video output terminals.
Are V-SUB, SY-SUB and SC-SUB
output from P8901?
NO
Is the (Y, C) signal output to pins
(7) and (1) of IC8901?
NO
Is the (Y, C) signal output to pins
(5) and (3) of IC8901?
NO
Check IC8101, IC8102, IC8301-
IC8304 and their peripheral
circuits.
YES
YES
Do pins (4) and (13) of IC8902
become "L"?
NO
Check the peripheral circuits of
IC8902 and IC9752 (AV5V
voltage).
YES
Check the peripheral circuits of
IC8901 and IC9754 (AV9V
voltage).
47
(Continued)
Check the cable connection
between P8901 and P1105.
Go to troubleshooting of
DUNTKC258DE01 (AV circuit
PWB).
YES
Check Q8901, Q8902, IC8101
and their peripheral circuits.
TU-GD10U-T
TU-45GAD/T
LC-45GX6U/D/T