[image: 20250715_185728.jpg]

This is part of a 500-piece order that we're trouble-shooting -- 10 pieces,
or 2%.

We usually do QC functions using a test fixture, and these are the units
that didn't pass our tests.

We've made our own test fixtures, which is how we caught that these units
needed work.  We can usually take that 2% down to 0.5% pretty quickly just
be looking at the board itself with some magnification.

It'll be something like someone mishandled the board and broke a cap, maybe
a LED was installed backwards.  Sometimes it's something as dumb as a
dented corner from the board being dropped -- in other words, the
inconsistencies introduced by humans.

We're good at diagnostics and repair.  It's not the best use of our time,
but doing it keeps us sharp.  CMs usually call this "the bone pile."

Regards,
Thomas Pownall

CADX Services, Inc.

Tel: 585-624-1491 X101
Fax: 585-582-1101
E-Mail: tpownall@cadxservices.com
Web: http://www.cadxservices.com

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