merlynski
Curmudgeon Electronicist
Thank you all. Stk's pulled and 1K's put in their place. Q20 is back to what I tested as a good 2sc536a. Still no relay click, but I am retaking readings.
Q20
B = -18.2v
C = -54.1v
E = -26.6v
More to follow.
Q20 is off hard because the B-E junction is reverse biased. The only source of current to pull Q20B negative (to -40vdc) like it should be is through Q24. I suspect an open trace or a blown Q24. You indicated trace damage in that area from the past?
What are the CBE voltages on Q22? If it is blown or installed wrong it could pull Q20B positive.
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