Philips DVDR3320V/01 Service Manual page 31

VCR ELECTRICAL TROUBLESHOOTING GUIDE
3. Y/C CIRCUIT
(2) Hi-Fi Playback
PB mode
YES
No Sound.
YES
Check the Vcc of IC801
(Pins34, 40)
YES
Check the Hi-Fi Selection switch.
(IC801 Pin41) and the Tape quality.
YES
Is the RF Envelope at
IC801 Pin44 over 2Vp-p?
YES
Check IC801 Pin42(Data),
Pin43(Clock)
YES
Do Audio Signals appear at
IC801 Pin16(L-CH), 17(R-CH)?
YES
Do Audio Signals appear at
IC802 Pin25(L-CH), 21(R-CH)?
YES
Do Audio Signals appear at
JK901, SC901?
NO
Check Power 5.0V, 12V.
NO
Check IC501 Pin26
(A.H/SW)
NO
NO
Check the parts of µ-COM
(IC501 Pins17, 18)
NO
Check the Connection at
P3D01 Pins7, 9.
NO
Check the Audio PMD02
Pin23, 25.
Check the IC802 Pins6, 12
NO
Check the Jack(JK901,
SC901)
3-17
NO
YES
Check the DVD Board
Audio Path