Replaced some caps on an MS-7207 / K8MGN2 Board

[Doward]

Video: http://www.youtube.com/watch?v=Y5XS0olm2ww

Gateway board, thought this might help someone out. Next up is an AsRock board with some bad capacitors

[ant3202]

Re: Replaced some caps on an MS-7207 / K8MGN2 Board

the desoldering stuff is cool

[mariushm]

Re: Replaced some caps on an MS-7207 / K8MGN2 Board

I can't say that it's a good job... it will work, but it's kinda lousy.

That desoldering tool is crapy, doesn't have the thermal mass to heat up the board quickly and suck that solder out, hence why you got solder in the holes.
Alternatively, heating up the back side with a hair dryer or something would have helped A LOT.

It makes more sense (and it's easier) to just add solder to the leads, heat both leads solder points and wiggle the capacitor out.
When you put the new capacitor in, you just heat up the solder and then take the solder out completely and use fresh solder. The way you did it is prone to damaging the vias when you put that needle in.

Not sure how much that dab of rosin flux helps with soldering probably it's pointless.
The iron should be so hot and touching BOTH the copper trace on the board and the lead that you should only have to put the solder wire between the lead and the iron tip to form a bridge then in 2-3 seconds you would just push the solder wire in and see it flow nicely. 3 seconds max everything, retreat solder wire, retreat solder iron tip... nice solder job.

The way you do it it's a bit risk that you get cold solder joins, because the copper back of the board sucks all the heat away, it looks like you have a hard time getting the solder to flow there.
Wiggling caps won't give you 100% check for cold solder joints... lead is thick enough and hole is thin enough theres enough friction a bit of solder will give you the feeling everything's right.

The WORST thing is the way you use that tool to cut the leads.. it's not supposed to be used like that. You can scratch the board, cut traces on the board, scrape off the solder resist with the tip of that thing... you use it flush on the board, horizontally...

[Koda]

Re: Replaced some caps on an MS-7207 / K8MGN2 Board

Definitely agree with mariushm. You need some basic soldering/desoldering skills buddy.