Zenith XBV243 series Service Manual page 28

TROUBLESHOOTING (CONTINUED)
(B) No Sound
No Sound.
Check the Vcc of IC751 Pins1,
11, 19, 22, 33.
Check the Tuner SiF signal at
IC751Pin2.
Check the oscillator of IC751 Pins 5, 6.
Check the Audio of IC751 Pins30, 31.
Check the Audio of IC801 Pins 2, 3.
Check the Audio of IC801 Pins 16, 17.
Check the Audio of IC802 Pins 22, 26.
Check the Signal flow from IC802 Pins22,
26, JK801 Audio out(L), (R)
VR168 - 923-03485
ELECTRICAL
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
Check the Tuner SIF of TU701 Pin22.
NO
NO
Check the IIC Clock and Data at IC751
N O
N O
Check the IIC Clock and Data at IC801
N O
Check the signal flow from IC801
Pins16, 17 to IC802 Pins 10, 16.
3-16
Check 5.2V Line.
Replace X751
Pins 12, 13.
Check the signal flow from IC751
Pins30, 31 to IC801 Pins 2, 3.
Pins42, 43.
D35E COMBO - ELECTRICAL