Philips DVDR3320V Series, Service Manual, Page: 33 / 196

3-19
6. Tuner/IF CIRCUIT
(1) No Picture on the TV screen
No picture on the TV
screen
Does the Video signal
appear at TU701 Pin19.
YES
Is 33V applied to TU701
Pin17?
Is +5V applied to TU701
Pin4?
NO
Does the video signal at
the PMD02 Pin5?
NO
NO
NO
Does the Video signal at
the IC802 Pin 29.
Does the Video signal at
the IC901 Pin 23.
Check 33V line.
NO
NO
NO
Check 5V line.
Does the Clock signal
appear at TU701 Pin12? Check the llC Clock Signal
of µ-COM Pin18.
Does the data signal
appear at TU701 Pin13?
Replace Tuner.
Check the DVD Board
Video Path.
Replace the IC802.
Replace the IC901.
Does the video signal
appear at IC802 Pin28.
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
Check the Pattern between IC901
Pin23 with SC901 Pin19
Does the Video signal at
the IC802 Pin31.
Check the Pattern between
TU701 Pin19 and IC802 Pin28.
Replace the IC802.
NO
YES
Does the Video signal at
the IC301 Pin15.
Check the Pattern between
IC802 Pin31 and IC301 Pin15.
NO
YES
Does the Video signal at
the IC301 Pin29.
Replace the IC301.
Check the llC Data Signal
of µ-COM Pin17.
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