Read Sharp XG-NV7XE (serv.man3) Service Manual online
30
XG-NV7XE
XG-NV7XM
TROUBLE SHOOTING TABLE
(Continued)
Checking the video system
Yes
No
Go to "Lamp fails to light-up".
Yes
No
Are specified voltage fed to PA and
PB connectors?
PB connectors?
Check the power circuit and its parts.
Yes
No
Are there signal inputs at pins (12),
(13) and (17) of SC302?
(13) and (17) of SC302?
Is there signal at pin (4) of IC6001?
Are there signal outputs at pins (7) of
IC6006 and (5) of IC6009?
IC6006 and (5) of IC6009?
Yes
Check the video unit circuit
(IC4501 and IC4001 and its
peripheral circuits).
(IC4501 and IC4001 and its
peripheral circuits).
No
Check the oscillation circuit
of IC6001, and their
peripheral circuits.
of IC6001, and their
peripheral circuits.
Yes
Go to "Checking IC801
(RGB signal output circuit)".
(RGB signal output circuit)".
No
Check IC6008, IC6006,
IC6009 and their peripheral
circuits as well as switching
circuit.
IC6009 and their peripheral
circuits as well as switching
circuit.
Is the lamp on?
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