25 Aug
2010
25 Aug
'10
6:46 p.m.
From: ard at p850ug1.demon.co.uk
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WHile cleaning the dirt off this PCB (HV attracts dust electrostatcally,
of couse), I noticed that the ground pin of this IC never made it through
the board. It's folded under the package, but has been effectively
surface-mount soldered to the pad when the board was wave-soldered. It
works, but I can't beeleive it's as good as a proper through-hole
connection, and it's certian;y not what was intended.
I could trivially desolder the IC, straighten the pin, and solder it back
properly. But should I? What would others do?
-tony
Hi
First, can you explain how it works as is?
Being one shots, such a fix might effect the timing. Is it adjustable?
At a place I once worked, we had a board where the +5 was missing from
a CMOS part. It was running from the inputs that luckily always had
at least one high.
Dwight