28 Dec
2001
28 Dec
'01
10:27 p.m.
How high of a temperature is your water???!!!!!
The normal *operating* range, let alone the *storage* temperature range for
just about all electronic components is much higher than what a human being
can take a bath with.
As far as the 68000 goes, I was personally involved with the construction
of a board which used an old 68000 series processor, and we washed those
boards in a commercial Hobart dishwasher.
.... using city water....
Oh well. I will continue to use the dishwasher. I've done it on very
expensive boards, including ones with 10MHz TCXO's. I even calibrated
TCXO's after boardwashing using hot water. No problems ever observed - I
personally calibrated a few hundred of them.
Don't forget - these components also went through wave
soldering.... sometimes the peak temperature after wave soldering was
higher than the washing afterwards.
- Matt
At 08:42 PM 12/28/2001 -0500, you wrote:
Tried it.
It toasted an EPROM, and a 68000N-10 in a plcc package.
The heat is simply too high.
Also, older boards often use TTL devices in the grey package that is not
properly passivated. These often go bad without running them through
a dish washer.
For every person on the list who can look at a given board and decide
what components may withstand this treatment, there is another who will
not know a TCXO from any other oscillator, or some other component that
will not stand this abuse (many won't, and only some of them are listed
below),
and dammage something.
Matthew Sell wrote:
Matthew Sell
Programmer
On Time Support, Inc.
www.ontimesupport.com
(281) 296-6066
Join the Metrology Software discussion group METLIST!
http://www.ontimesupport.com/cgi-bin/mojo/mojo.cgi
"One World, One Web, One Program" - Microsoft Promotional Ad
"Ein Volk, Ein Reich, Ein Fuhrer" - Adolf Hitler
Many thanks for this tagline to a fellow RGVAC'er...
For those who don't believe that it's
okay - prove it to yourself.
Here's how:
>
> 1) Pick a dirty, filthy board that somehow seems to work, and is worth very
> little to you
> 2) Make sure it doesn't have:
>
> a) relays
> b) large capacitors
> c) transformers
> d) iron-core inductors
> e) fragile labels or core memory
>
> 3) put it in your dishwasher by itself, with no detergent (just for
> testing), and turn off the plate warmer and dryer
> 4) wash it!
> 5) shake off excess water after cycle finishes
> 6) clean - isn't it?
> 6) hang up to dry indoors for several days
> 7) plug it in. Works, doesn't it?!! And clean, too !!!!!
>
> Don't take our words for it. Try it!!!! You'll be amazed at how clean the
> boards get, with so little effort on your part.
>
> - Matt
>
> At 11:22 AM 12/28/2001 -0600, you wrote:
> >On Fri, 28 Dec 2001, Bob Shannon wrote:
> >
> > > Never run boards through a dishwasher!
> >
> >Oh no, not this thread again :)
>
> Matthew Sell
> Programmer
> On Time Support, Inc.
> www.ontimesupport.com
> (281) 296-6066
>
> Join the Metrology Software discussion group METLIST!
> http://www.ontimesupport.com/cgi-bin/mojo/mojo.cgi
>
> "One World, One Web, One Program" - Microsoft Promotional Ad
> "Ein Volk, Ein Reich, Ein Fuhrer" - Adolf Hitler
>
> Many thanks for this tagline to a fellow RGVAC'er...