Sharp XV-C100U, Service Manual

Page: 25 / 73

XV-C100U
25
TROUBLE SHOOTING TABLE
Checking the video system
No picture
Is the lamp on?
No
Yes
No
No
Yes
Check IC801, IC804, Q801, Q802,
Q803 and their peripheral circuits.
No
Yes
Yes
Check DL401, IC401, Q401 and their
peripheral circuits.
No
Yes
Check the lamp.
Check the ballast unit circuit.
Is voltage applied at the EA
and EB connectors?
Check the power unit.
Is there signal at pins (21) and
(29) of IC801?
Check IC401, DL401 and their
peripheral circuits.
Is there signal at pins (1), (2) and (3)
of P803?
Go to "Checking the IC1501
interface circuit".
Is there chroma signal input at pin
(20) of IC801?
Check IC801, IC802, IC804 and its
peripheral circuits (X801 and C810 in
particular).
No color or poor tint with
NTSC signal