Sharp XV-Z9000U Service Manual page 38

XV-Z9000U/E
Checking the RGB signal
Is the type of signal set at
RGB?
NO
Call the process mode.
Select R, G and B
separately on the pattern
menu.
Go to "Checking the GA4
peripheral circuits".
Set the signal generator to
the gradation signal mode
in order to check the input
signal.
Measure the gradation
signals at TL8073, T8074,
T8075 and T8080.
Are there specified signals
at TL8073, TL8074,
TL8075 and TL8080?
YES
IC8025 or its peripheral
circuit defective.
YES
Set to the RGB signal.
NO
Are there input signals at
C8069 and C8061?
YES
IC8004 or its peripheral
circuit defective.
38
NO
Input PWB defective.