Acer P221W - Page 34

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3. Scalar
Are all the power and
ground pins at the correct
voltage level?
Are the correct RGB and
Hsync signal fed to
Scalar ?
Scalar failed
to output data
YES
YES
NO
NO
Capacitors of Crystal
have damaged
Check the remaining
circuits
Measure the signal pairs
on LVDS data output and
clock from Scalar
Is the correct Sinusoidal
wave appeared on Crystal
YES
Are the pixel output
correct?
Are the signals presented
on DSub connector?
Scalar failed
Power or the ground pins
has bad contacts
DSUB Connector
or PC failure
Bad wiring between
DSUB and Scalar
NO
NO
YES
YES
NO