Zenith XBR413 - Page 25

3-18
VCR ELECTRICAL TROUBLESHOOTING GUIDE
3. Y/C CIRCUIT
(2) Hi-Fi Playback
YES
YES
YES
YES
PB mode
No Sound.
Check the Vcc of IC801
(Pins34, 40)
Check the Hi-Fi Selection switch.
(IC801 Pin41) and the Tape quality.
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
JK601?
Check Power 5.2V, 12V.
NO
Check IC501 Pin19
(A.H/SW)
NO
NO
Check the parts of µ-COM
(IC501 Pins71, 72)
NO
Check the Connection at
P3D01 Pins7, 9.
NO
Check the Jack(JK601)
NO