Re: Star Wars Power Supply

----- Original Message -----
From: <jwelser@ccwf.cc.utexas.edu>
To: <vectorlist@lists.cc.utexas.edu>
Sent: Monday, August 16, 1999 7:30 PM
Subject: Star Wars Power Supply

>
> Hey all,
>
> Here's one from the Twilight Zone.....
> That Symptom: No +5V. The continuity of all fuses (and
> fuse holders) is good. Tracing back uncovers wierdness with the
> +10.6 VDC unreg. With the connector unplugged from the RA/II board, the
> +10.6 VDC unreg will SLOWLY climb to around +10.6 VDC. When I say SLOWLY,
> I mean over the period of time of about a minute or two. It climbs more
> or less linearly from 0. When I plug the RA/II board in, the +10.6 VDC
> unreg line doesn't get above a volt or so.

> So, has anyone run across a "weak" bridge rectifier before? It
> seems to be an odd failure mode. Usually these things either open up or
> short out, but I guess every once in a while they could do something in
> between....

It may well be the diodes-I work in Tv/Vcr repair. There are times when I
run
across a bad diode that passes no voltage in circuit, but checks ok with a
tester; it does happen!

--
Aaron Howald
ahowald@w-link.net
>
> Joe
>
>