Lewm,
From what my Tech showed me, I'd be firstly inclined to not worry about the values you are getting when you test some of the ICs.
He showed me three or four values in the Service Manual that he said bore no relationship to those he measured.....and the ICs he measured, actually worked perfectly once the solder joint problem was remedied.
As I surmised above....with the TT-101, firstly suspect a poor solder joint before thinking 'bad' IC or transistor.
From what my Tech showed me, I'd be firstly inclined to not worry about the values you are getting when you test some of the ICs.
He showed me three or four values in the Service Manual that he said bore no relationship to those he measured.....and the ICs he measured, actually worked perfectly once the solder joint problem was remedied.
As I surmised above....with the TT-101, firstly suspect a poor solder joint before thinking 'bad' IC or transistor.

