XG-P20XE (serv.man5). Service Manual Part 2 - Troubleshooting, Block and overall diagrams - p36-87 - Sharp Projector Service Manual (repair manual). Page 4

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39
XG-P20XU
XG-P20XE
XG-P20XD
TROUBLE SHOOTING TABLE 
(Continued)
No or unusual Y signal
Yes
No
Check IC4502 and its peripheral 
circuits.
No
Check IC4501 and its peripheral 
circuits.
Yes
No
Check IC4311 and its peripheral 
circuits.
Yes
Check SC4303 and its peripheral 
circuits.
Is there Y signal output at pin (5) of 
IC4311?
Is there Y signal output at pin (7) of 
IC4501?
Is there Y signal input at pin (84) of 
IC4502?
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