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On Thu, Aug 12, 2021 at 02:12 AM, Ozan wrote:

TP93 should be a clipped sine wave clamped at top by CR4111 (~100V) and
clamped at the bottom by CR4112 (~ 15V to 95V depending on intensity setting).
What do you observe on a scope?

Also, compare the waveshape and voltages at point 91 (TP4217) with the waveform as shown in the diagram. Horizontal settings as under "AC Waveforms" above the image of point 91.

Raymond