XG-P25XE (serv.man12). Troubleshooting table - Sharp Projector Service Manual (repair manual). Page 13

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XG-P25X
48
TROUBLE SHOOTING TABLE FOR PC I/F UNIT 
(Continued)
Make the RGB signal settings.
Call the process mode.
Select R, G and B 
individually from the pattern 
menu.
Set the signal generator for 
the gray-scale signal in order 
to check the input signal.
Measure the gray-scale 
signals at TP8001, TP8002 
and TP8003 on the 
oscilloscope screen.
Checking the RGB signals
Is the signal type selected 
for RGB?
Go to "Checking the GA4 
and its peripheral parts".
Are the gray-scale signals at 
TP8001, TP8002 and 
TP8003 as specified?
Are there the input signals at 
C8068 and C8061?
Input PWB defective.
IC8004 or its peripheral 
parts defective.
IC8025 or its peripheral parts 
defective.
NO
NO
NO
YES
YES
YES
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