On Thu, 22 Aug 2019 09:22:45 -0400 Max Dillon via Mercedes
<mercedes@okiebenz.com> wrote:
> Yeah, I'm going to order a few of each of the capacitors, start
> building up a "ready spare" reserve.
Good idea.
> I'm not skilled enough to ID a bad solder joint by visual inspection
> unless it is REALLY bad.
First, make sure there is not a conformal coating over the circuit board
-- if there is you must remove it from either each joint or the
entire circuit board
Then get a solder sucker if you don't have one.
Then go over each joint, removing the existing solder and adding new --
you will have to do that with the six capacitor joints, anyway.
This presumes you already have a soldering iron and non-acid flux-cored
solder.
Alternatively, for the non-capacitor joints, you could use some liquid
rosin flux and put a drop of it on each joint before you heat it to
re-do the joint.
NOTE: You must always use flux when you heat a joint, which is why you
must use flux-cored solder even for the initial forming of a joint.
NOTE: The flux for plumbing pipe is not appropriate for circuit boards
-- it contains substances which remain electrically conductive
after soldering.
Craig
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