ViewSonic PJ452 - LCD XGA Projector-4.9LBS Service Manual page 17

ViewSonic Corporation
Picture is not displayed only
when the RGB signal is input
Check at operating mode
Are
voltage input
at pins(1)(3)(5)(7) of
E800 on the PWB
assembly
MAIN?
YES
PWB assembly MAIN
Picture is not displayed only when the
VIDEO, S-VIDEO signal is input
Check at operating mode
Are
voltage input at
pins(1)(3)(5)(7) of E800
on the PWB assembly
MAIN?
YES
PWB assembly MAIN
NO
Power unit
(1):+13.2V
(3):+17V
(5):+6.6V
(7):+4.1V
LCD PRISM
assembly
NO
(1): +13.2V
(3): +17V Power unit (circuit)
(5): +6.6V
(7): +4.1V
LCD PRISM
assembly
14
(circuit)
Confidential - Do Not Copy
PJ452