Zenith D35 Service Manual page 30

(2)
PB Mode.
No sound
Is 5.1V power supplied at IC301 Pin96?
Do CLOCK,DATA Signal appear at
IC301 Pins62, 63?
Does Sound Signal appear at IC301
Pin11 ?
Check IC801 Pin22 Circuit
YES
YES
YES
YES
YES
NO
Check 5.1V Power Part.
NO
Check CLOCK,DATA of µ-COM.
NO
Does Sound signal appear at IC301
Pin100?
Check and replace connection at P3D02
Pin6 connect.
3-18
YES