XG-NV33XE (serv.man2). Service Manual text - Page 1-55 - Sharp Projector Service Manual (repair manual). Page 43

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43
XG-NV33XE/XM
XG-NV330XA
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-7
Checking the OSD circuit and its peripheral circuits
Yes
No
Are there signals at pins (7), (8), (37) 
and (38) of TC3 connector?
LCP circuitry faulty.
Yes
No
Are there signals at pins (1) and (2) of 
IC8037?
IC8025, IC8055 or their peripheral 
circuits faulty.
Yes
No
Are there signals at pins (71), (74) 
thru (79) of IC8025?
IC8037 or its peripheral circuit faulty.
IC8036 or its peripheral circuit faulty.
Checking the remote control
Yes
No
Run the remote control. Are there 
signals at pins (9) and (39) of TC3 
connector?
LCD circuitry faulty.
IC8001 or its peripheral circuit faulty.
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