Abnormal color of video picture
Trouble shooting chart
Abnormal color of
video picture
Yes
Check whether the 27MHz output signal
Yes
Check whether the 3.3V and 1.8V power supply voltages on the decoder board are normal.
Yes
Check whether the video filter network circuit is normal.
Yes
Check if the video signals on Pin 58,60,61,63 of U1 are normal.
No
No
No
No
Check Y2, R28, C31 and C33
Check other of power supply electric circuit
Correct the connection
change U2
