Older Peavey PA Head XR600C. Problem with 400BH Boardthe B is like 0v unplug B and I have the voltages for the /- 16Volts. Plug in the B ( -52V) and nothing. Replaced all 4 6A2 diodes, caps test good, resistors test ok. 2 resisters fried, they were the 47 Ohm FP's. replaced those, tried new transformer. Disconnected the audio out board for isolation and the mixer section of the board. Need Help Thank you.
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