Read Sharp XG-PH70X (serv.man4) Service Manual online
XG-PH70X/XG-PH70X-N
4 – 12
Checking the periphery of GA5
Select R, G and B separately in the pat-
tern menu of the process mode.
Are R, G and B of a picture sent prop-
erly?
YES
End of checking the periphery of
GA5.
GA5.
NO
Measure pins 31, 21 and 11of SC8004
with an oscilloscope.
These signals are MSB of B/G/R.
with an oscilloscope.
These signals are MSB of B/G/R.
Do the contents selected in the pattern
menu correspond with the measured
signals?
YES
The formatter PWB is defective.
NO
Is the clock applied to the pin 58 of
SC8004?
SC8004?
NO
Is the clock (65 MHz) applied to
FL8009?
FL8009?
YES
IC8032 is defective.
YES
NO
Is the clock (65 MHz) applied to
FL8006?
FL8006?
NO
X8004 is defective.
YES
Measure TL8047, 8048, and 8049 with
an oscilloscope.
an oscilloscope.
IC8025 is defective.
Do the contents selected in the pattern
menu correspond with the measured
signals?
NO
IC8025 is defective.
YES
IC8032 is defective.
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