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B&K 1077B no video - problem solved
#8

I'm going to get back into it tonight. but I disconnected the 2 main resistors off this supply going to different parts of the unit. I'm thinking maybe a diode failed?? It checks ok on my Fluke ... but maybe breaking down when higher voltage is applied?? I have a solid 220 A/C off the PT on that side, yet only around 100v or so with no load. That's with all the caps out of the circuit. BTW, I did change all the electrolytics back with my 1st revamp, so I'll change that diode tonight and clip a fresh e cap on and see that happens. It's actually about the same setup and voltages as the B+ except it's the - supply. I'll try to get a schemo posted which I have with the ICs. It's actually 2 ICs but shown as 4 on the diagram. It's really kinda weird yet ingenious how this works!

If I could find the place called "Somewhere", I could find "Anything" Icon_confused

Tim

Jesus cried out and said, "Whoever believes in me , believes not in me but in him who sent me" John 12:44


Messages In This Thread
B&K 1077B no video - problem solved - by TV MAN - 02-11-2025, 01:26 PM
RE: B&K 1077B no video - by TV MAN - 02-11-2025, 02:03 PM
RE: B&K 1077B no video - by radiorich - 02-11-2025, 09:01 PM
RE: B&K 1077B no video - by TV MAN - 02-11-2025, 09:11 PM
RE: B&K 1077B no video - by radiorich - 02-11-2025, 11:07 PM
RE: B&K 1077B no video - by TV MAN - 02-12-2025, 12:41 AM
RE: B&K 1077B no video - by radiorich - 02-12-2025, 01:55 AM
RE: B&K 1077B no video - by TV MAN - 02-13-2025, 04:04 PM
RE: B&K 1077B no video - by radiorich - 02-13-2025, 10:59 PM
RE: B&K 1077B no video - by TV MAN - 02-15-2025, 12:40 AM



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