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Check 6
Start
Check input signal
Video 3 / Video 4 are abnormal.
Power lamp : Lighted green
(10 sec or more)
Can this unit select
only RGB mode ?
Install Video PCB
Unit faulty.
Yes
No
Is picture
displayed on screen
normal when new
Video PCB Unit
installed ?
Are brightness
and color difference
signals connected to
input terminals
correctly ?
Video PCB Unit
faulty.
Yes
Check connection
cable.
No
No
Is signal
input level
normal?
Signal processing
circuit faulty.
Replace Main/Digital
PCB Assy.
Yes
Yes
No
∗
SYNC signals are added to the Y signal.