Sharp XG-C58X Service Manual page 38

XG-C58X
XG-C68X
TROUBLE SHOOTING TABLE (Continued)
Checking the video system
Is the lamp on ?
Yes
Is specified voltage EA
connectors?
Yes
Is the video signal inputted into the
pin (23) of P3102?
Yes
Is the signal outputted from the pin
(7) of IC4502?
Yes
Is the signal outputted from the pin
(5) of IC4505?
Yes
Is the signal inputted into pin (72)
of P8002?
Yes
Go to "Checking the PC I/F unit".
No
Go to "Lamp fails to light-up".
No
Check power circuit and its parts.
No
Check the video terminal and its
peripheral circuits.
No
Check IC4502 and its peripheral
circuits.
No
Check IC4505 and its peripheral
circuits.
No
Check Q4501 and its peripheral
circuits.
38