Hi and big thanks to everyone who involving this.
Here is what i found so far:
Vertical mode CH2, Volts/div rightmost position, pulled out, red knob clicked left to clock four?
timebase .2 sec /div, coupling AC
Trace is definitely there because when i turn intensity to full, trace seems to be there but out of screen (top).
If i pull position knob CH2 it switches to bottom, but still out of screen.
Measurements done so far:
Both channels fed by same signal and for u102 and u202 pin 9 on both, signals are almost equivalent.
Other pins on that chip are not so equivalent. Pin 9 there is 1.5v difference.
Here is what i had done so far, but more tomorrow
-welpester