Here are some pics of the board and the amp. I have not removed the board to test each component, instead I have a function generator board level, and a hand held oscilloscope. I am not sure what the maximum input voltage for the scope is, documentation is sketchy and the web site is in chinese..
Can you tell me assuming I can use this scope, what points on the board I should look at the for the signal?
My own ideas were
j7, v1 pin2, v1 pin 1, c2, v2 pin2, v2 pin 1 and 8, c8 and c10 r20 and r22, j2 and j1
If that is incorrect can you point me in the right direction..
Thanks