it is on one of the edges. here is a pic of the foil side from page 18 of the SM:
View attachment 1339969
R and L channel in should be 0v.
Capacitors block DC voltage and pass AC signal.
What source do you have selected? If it was FM/AM then the coupling caps are leaking.(Cg72&73) Select AUX and remeasure.I don't have the bottom off so pin 1 was obscured. Following the trace R1 has 6.3V and R2 has 9.6.
That's bad.
I'm going to stare at the schematic and diagram some more to self-smarten.
This is about the only logical source for the stray voltages. But the input selector switch would need to be the conduit. ie. really fouled internally or shorted at the solder connections.If it was FM/AM then the coupling caps are leaking.(Cg72&73)
if you are planning to order new caps, I'd suggest posting what you plan to get. guys like hopjohn might have some recommendations.
for example, i'd probably use 505-MKS4B041002CJF00 for the 1/50v Cg72,Cg73. just need to verify lead spacing.
Well that escalated quickly..
I pulled the blocking caps and they measured good, both traces popped in the process (I've never had a trace pop up like that) and in an unconnected event the power/speaker select switch will only work on both channels with some decent windage applied.
Tossing it to Barter Town to see if anybody needs parts, I've got other projects to move on to.
I do have exactly the same issue with mine
Have
you figured it out?