> -----Original Message----- > From: Maciej W. Rozycki [mailto:ma...@linux-mips.org] > Sent: 28 October 2017 18:48 > To: r...@jarratt.me.uk > Cc: 'General Discussion: On-Topic and Off-Topic Posts' > <cctalk@classiccmp.org>; 'dwight' <dkel...@hotmail.com> > Subject: RE: Cleaning and Restoring a Badly Corroded PSU > > On Sat, 28 Oct 2017, Maciej W. Rozycki wrote: > > > > Did you manage to remove this part without destroying it and without > > > damaging the board? > > > > Yes, in all cases. I didn't recall any issues with unsoldering this > > part really, using a simple 40W iron and desoldering wick only, and > > extra flux from a pen. > > On second thoughts if solder has corroded, which may well be the case given > the overall state of your PSU, then you will have troubles melting it, because, > obviously, oxides and other compounds which would have formed won't usually > melt as easily as metal. In that case I suggest trying mechanical means to > remove the contamination and then applying extra solder to increase its mass > in the joint before trying to undo it. >
Yes, I did the extra solder thing too, the problem there was getting it to flow properly, even with extra flux from a pen. I couldn't get much new solder into the joint. I never thought to remove the contamination though, which is probably part of the reason why the extra solder would not flow, one to remember next time. > I do remember having problems with handling corroded joints next to leaked > capacitors in my H7874 PSUs, even though those specific joints didn't have any > way to lose heat easily. > > HTH, > > Maciej