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5-6
Abnormal color of video picture
Yes
Abnormal color of
video picture
Check whether the 3.3V
and 1.8V power supply
voltages on the decoder
board are normal.
Check Y2, C34 and C68
Check the other of supply electric
circuit
Correct the connection
Check whether the
video filter network
circuit is normal.
Yes
Yes
No
No
No
Check whether the
27MHz output signal
is normal.
Trouble shooting chart
Replace U3
Yes
Summary of Contents for PET717
Page 33: ...Main Board Print Layout for PET717 93 Top Side 9 1 9 1 ...
Page 34: ...Main Board Print Layout for PET717 93 Bottom Side 9 2 9 2 ...
Page 35: ...TFT Board Print Layout for PET717 93 Top Side 9 3 9 3 ...
Page 36: ...TFT Board Print Layout for PET717 93 Bottom Side 9 4 9 4 ...
Page 37: ...Key Board Print Layout for PET717 93 Top Side 9 5 9 5 ...
Page 38: ...Key Board Print Layout for PET717 93 Bottom Side 9 6 9 6 ...
Page 39: ...IR Board Print Layout for PET717 93 Top Side 9 7 9 7 ...
Page 40: ...IR Board Print Layout for PET717 93 Bottom Side 9 8 9 8 ...