Sharp XV-Z1A Service Manual page 29

TROUBLE SHOOTING TABLE TROUBLE SHOOTING TABLE
Checking the PWB performance
RGB input in trouble
Feed test pattern signal from PC.
Is specified cable connected between
PC and projector?
Yes
Is supply voltage as specified?
Yes
Does image appear?
Yes
Is the image proper?
Yes
Check control circuit (IC5001, IC5002,
IC5003 and IC5010).
Does G picture appear?
Yes
Does R picture appear?
Yes
Are D/A outputs of IC1007, IC1008
and IC1030 as specified?
Yes
Go to "Checking the B signal line of
output PWB".
Through-output in trouble
Go to "Checking the through-output
circuit".
No
Use specified cable.
No
Power circuit in trouble.
No
No
Are D/A outputs of IC1003, IC1004
and IC1028 as specified?
Yes
Go to "Checking the G signal line of
output PWB".
No
Are D/A outputs of IC1005, IC1006
and IC1029 as specified?
Yes
Go to "Checking the R signal line of
output PWB".
No
Go to "Checking the B signal line of
signal PWB".
29
(Continued)
Remote control in trouble
Go to "Checking the remote control
circuit".
No
Go to "Checking the G signal line of
signal PWB".
No
Go to "Checking the R signal line of
signal PWB".
XV-Z1E/A