Dry joints - an old friend returns to bite the unwary.

Elitist · 04-13-2006, 01:38 AM

A reminder that bad PSU s aren't always down to bad caps! Have a "Winpower" PFC VV-350 here that was showing all the signs, viz. intermittent operation (or not), sudden shutdown, etc, and, occasionally, no problem at all! Clean as a whistle inside - no bulging caps, no burnt tracks, thermal cutout not even fitted (!). Just a dry joint on an emitter diode - I think, ie unless the problem returns.....

Rainbow · 04-13-2006, 04:21 AM

Once I was doing something with one of my machines and then it wouldn't power on again - so I replaced the PSU. Then found dry joint on +5V output capacitor in the swapped one - Codegen (EuroCase) AT.

04-13-2006, 01:38 AM	#1
Elitist Senior Member Join Date: Apr 2006 City & State: GB Posts: 111	Dry joints - an old friend returns to bite the unwary. A reminder that bad PSU s aren't always down to bad caps! Have a "Winpower" PFC VV-350 here that was showing all the signs, viz. intermittent operation (or not), sudden shutdown, etc, and, occasionally, no problem at all! Clean as a whistle inside - no bulging caps, no burnt tracks, thermal cutout not even fitted (!). Just a dry joint on an emitter diode - I think, ie unless the problem returns.....

04-13-2006, 04:21 AM	#2
Rainbow Badcaps Veteran Join Date: Aug 2005 City & State: Slovakia Posts: 1,080	Re: Dry joints - an old friend returns to bite the unwary. Once I was doing something with one of my machines and then it wouldn't power on again - so I replaced the PSU. Then found dry joint on +5V output capacitor in the swapped one - Codegen (EuroCase) AT.

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