resoldering circuit boards

[Bob & Bettina Groh]

As another point, resoldering joints, etc, is not just for Heathkits.  I
recently had a Panasonic TV set (all solid state but with plug in
boards) which was giving me fits with intermittent operation.  At first
you could restore operation by a judicious 'tap' on the top or side but
it just got worse and worse until I kept the back off it and would reach
around and push boards, etc to try to find out where the problem was.
Finally isolated it to one board (with a 50 pin plug in connection to
the motherboard).  Took a good long look at the board but couldn't see
any bad joints.  So I just took the soldering iron and resoldered each
pin connection.  Fixed!  Apparently a bad solder joint that was just not
apparent on visual inspection.  And way to complicated to try to figure
out the problem with scopes, meters, etc.

Bob Groh, WA2CKY

"Multi-Volti Devices (Murray)" wrote:
>
> Maybe I misunderstood someone's reaction, but it is NOT a stupid
> troubleshooting approach with a Heathkit - it may be with a commercial piece
> of equipment...some people call this a 'shotgun' approach, as you don't
> actually find the problem.
>
> It was actually an accepted method at Heath when necessary - troubleshooting
> Heath kits is a totally different animal - one never knows whether it was
> EVER working properly, so component by component inspection, verification
> and resoldering can actually save time - if components were installed in the
> wrong places, charts, and subdivision of the signal flow tells you
> something, but multiple errors and failures are not uncommon.
>
> Often enough one can tell from the nature of the email request for help that
> little troubleshooting has actually been done, but where someone has
> actually done some troubleshooting and thinking and is still stumped,  I
> still feel it is a useful tool.
>
> Murray
>
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