T-348 Power Supply - Circuit?

[Harvey]

I've had a large and heavy Tait T348 plonked on my desk which looks like its worth trying to fix, its a big linear 15A 13.8V hunk.

There's a few resistors that have fried inside and it seems the overvoltage trip has been triggered, but fortunately the pass transistors all appear to measure intact.

Has anyone got a circuit for one of these ? Its a fairly straight forward looking design inside, I just don't fancy spending hours working it out

[Pentium4]

Re: T-348 Power Supply - Circuit?

Are the resistors actually fried and tested bad or do they just look like they got really hot? Resistors can take a surprising amount of heat and punishment. It's linear so it shouldn't be too hard to troubleshoot. Can we see some pictures?

[CapLeaker]

Re: T-348 Power Supply - Circuit?

we need to see pictures of everything and a exact description on what the PSU does or doesn't do. Is it blowing fuses, or are the fuses good and like 0.1V DC or something like 20V on the output terminal? How much amps is it drawing when powered up?