Philips DVDR630VR Service Manual page 34

VCR ELECTRICAL TROUBLESHOOTING GUIDE
(B) No Sound
No Sound.
Check the Vcc of IC701 Pins1, 11, 19,
22, 33.
Check the Tuner SiF signal at IC751
Pin2.
Check the oscillator of IC751 Pins5, 6.
Check the Audio of IC751 Pins30, 31.
Check the Audio of IC801 Pins2, 3.
Check the Audio of IC801 Pins16, 17.
Check the Audio of IC804 Pins3, 5.
Check the Signal flow from IC804 pin3, 5
Sc901 Pins1, 3.
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
Check the Tuner SIF of TU701 Pin16.
NO
NO
Check the IIC Clock and Data at IC751
Pins12, 13.
NO
Check the signal flow from IC751
Pins30, 31 to IC801 Pins2, 3.
NO
Check the IIC Clock and Data at IC801
Pins42, 43.
NO
Check the DVD Board Audio Path.
3-20
Check 5.2V Line.
Replace X751