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Abnormal color of video picture
Abnormal color of
video picture
Yes
Check
27MHz output signal is
Yes
Check whether the 3.3V
and 1.8V power supply
voltages on the decoder
board are normal.
Check whether the
video filter network
circuit is normal.
Check if the video signals on Pin 182
183,185 187 of U1 are normal
whether
the
Yes
Yes
5-8
No
Check Y1, R32, R47, C40,C41
No
Check other of power supply electric
circuit
No
Correct the connection
No
change U1
Trouble shooting chart
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