Philips SDV434/19, Service Manual

Page: 18 / 44

4-8
Abnormal color of video picture
Yes
Abnormal color of
video picture
Check whether the 3.3V
and 2.5V power supply
voltages on the decoder
board are normal.
Check Y1, R56, R56, C39 and C40
Check other of power 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
Trouble shooting chart
change U3 or U14
、
U15
Yes
No
Check if the Y1 to Y6 signals on Pin164
to Pin 173 of U3 are normal