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PG-M20X
» PC I/F Unit-7/12
Checking of GA4 and Its Periphery
Select R, G and B individually on
the pattern menu in process mode.
Is picture outputted appropriately
in R, G and B?
Yes
Checking of GA4 and its periphery
ends.
No
Check pins (72), (52) and (32) of
SC8001 by oscilloscope.
These signals are MSB of B/G/R.
Do the signals selected on the
pattern menu match with those
checked by oscilloscope?
Yes
The DLP PWB is defective.
No
Does the clock signal come to pin
(78) of SC8001?
No
Is there the clock (32.5 MHz)
signal at TL8114?
Yes
Yes
No
IC8029 is defective.
Is there the clock (32.5 MHz)
signal at TL8110?
No
Yes
X8005 is defective.
Check TL8106, TL8107, TL8108,
TL8109, TL81010 and TL81011
by oscilloscope.
Do the signals selected on the
pattern menu match with those
checked by oscilloscope?
IC8025 is defective.
No
IC8025 is defective.
Yes
IC8029 is defective.
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