Philips DVP520/00 Service Manual page 17

Abnormal color of video picture
Abnormal color of
video picture
Yes
Check
27MHz output signal is
Yes
Check whether the 3.3V
and 2.5V power supply
voltages on the decoder
board are normal.
Yes
Check whether the
video filter network
circuit is normal.
Yes
Check whether the signals are
normal from pin164 to Pin173 of U3
one by one
whether the
4-8
No
Check Y1,R50,R51,C80 and C81
No
Check relative power supply circuit
No
Fix connection
No
Replace U3 or U14 U15
Trouble shooting chart