PG-C20XE (serv.man6). Section 3 - Troubleshooting - Sharp Projector Service Manual (repair manual). Page 11

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41
PG-C20XU
PG-C20XE
AN-Z7T
Checking the digital signal 
processing circuit
Is there 40MHz or so clock 
signal at FL8024?
Is there 38kHz or so pulse 
(sync) signal at FL8026?
Is there 60Hz or so pulse 
(sync) signal at FL8025?
NO
NO
End
YES
YES
NO
YES
IC8022, IC8021 or their 
peripheral circuit defective.
Go to "Checking the PLL 
circuit".
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