46
XG-C55X
TROUBLE SHOOTING TABLE for PC I/F UNIT (Continued)
No
Yes
Yes
Yes
Checking of R, G and B Signals
Is the signal type set to RGB?
Set the signal type to RGB.
No
No
Set the process mode.
Select R, G and B individually on
the pattern menu.
Go to "Checking of GA4 and Its
Periphery".
For checking the input signal, set
the signal generator to gradation
signal.
Measure the signals at TL8169,
TL8170 and TL8180 on the
oscilloscope. (MSB bit after A/D
conversion)
Are there the specified signals at
TL8169, TL8170 and TL8180?
Does the signal come to C8062,
C8070 and C8078?
Go to "Confirmation of Video Input".
IC8013 or its periphery is defective.
IC8025 or its periphery is defective.
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