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Sim085 · 20 July 2018, 21:11

Thanks Allen1, from what I can see in the schematic (if I understand it correctly), E331 comes after C334 and the output of C334 is already at 11v which seem to indicate the problem is before this.

I did some more readings:

C332 - 8.52V
C331 - 0V

Both the above are with no sound playing. With sound playing there is some voltage on C331 which sometimes goes negative. I can see voltage changing on the various caps when sound is playing but not the C334 which seem to be stuck at around 10V.

20 July 2018, 21:11	#15
Sim085 Registered User Join Date: Apr 2009 Location: N/A Posts: 962	Thanks Allen1, from what I can see in the schematic (if I understand it correctly), E331 comes after C334 and the output of C334 is already at 11v which seem to indicate the problem is before this. I did some more readings: C332 - 8.52V C331 - 0V Both the above are with no sound playing. With sound playing there is some voltage on C331 which sometimes goes negative. I can see voltage changing on the various caps when sound is playing but not the C334 which seem to be stuck at around 10V.