6 Feb
2011
6 Feb
'11
1:04 a.m.
-----Original Message-----
From: cctalk-bounces at classiccmp.org [mailto:cctalk-
bounces at classiccmp.org] On Behalf Of dwight elvey
Sent: 06 February 2011 01:40
To: General Discussion: On-Topic and Off-Topic Posts
Subject: RE: PSU for MicroVAX 3400 Not Faulty But Not Working
Hi
With the correct equipment, the method I spoke of works quite well. I've
never failed to locate the short and within
5 minutes. No damage to the board or components that could occur by
unsoldering parts until the shorted one is found.
Dwight
=
I have to say I didn't really understand the described method .
Unfortunately I don't have a bench power supply of any description and can't
really justify the cost at the moment, so I will just have to go round
de-soldering components until I find the bad one. Still, it would be useful
to understand the method. Would you be able to elaborate?
Regards
Rob
From: ard at p850ug1.demon.co.uk
---snip---
Is there a simple way to find shorted caps
in-circuit? Would an
absolutely 0 ohm resistance while in-circuit indicate a shorted cap
for the reason I suggest above?
There's no simple way, it's easier just ot desolder at least one end
and test them effectively out-of-circuit.
The fact that you've found something that's shorted that shouldn't be
is a clue I think. What does that capacitor connect to (it may be
easier to trace this o nthe good PCB where the 2 ends don't test as
being shorted together).
-tony