Re: Tek 465 no display
That's a LOT of progress Russ!toggle quoted messageShow quoted text
With some more experience you might have thought already of a shorted C1549 after posts by Harvey and Fabio IIRC. One was that as good as zero output is a significant observation. The other that most tantalum caps have a series resistor so just one failing will not fully pull down the rail to zero. C1549 might be the only one *without* series resistor (I didn't check that).
That -6.4 V at the -8V rail could be due to a heavy load but more likely I think a bad big cap C1562. I would start there. Note that both sides of C1562 might show ripple w.r.t. ground when -8V is out of regulation. Try to measure the difference, so the ripple (and DC) across C1562. If OK then proceed with testing for current limiter activity as explained already in some posts.
On Fri, Jun 29, 2018 at 10:57 am, musicamex wrote: