Schematic sent (336-14, chassis KCS100B, the only match I found in the index).
Which waveform is that last photo showing?
If you want to go beyond resistance testing, this thread from the "other forum" has an article describing how to test for ringing with an oscilloscope (haven't tried it myself).
http://antiqueradios.com/forums/view...er=asc&start=0
Phil Nelson