Zenith XBR411 - Page 24

3-16
VCR ELECTRICAL TROUBLESHOOTING GUIDE
(B) No Sound
No Sound.
Check the Vcc of IC801 Pins15, 32, 36,
46.
YES
Check 5.2V Line.
NO
Check the Tuner SiF signal at IC801
Pin57.
YES
Check the oscillator of IC801 Pin51.
YES
YES
Check the Audio of IC801 Pins78, 80.
Check the Tuner SIF of TU701 Pin22.
NO
Replace X301
NO
Check the IIC Clock and Data at IC801
Pins37, 38.
NO