Zenith XBV243 Service Manual page 28

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