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1) We use a burn-off no clean. We found that the only "safe" way to
use it when repairing was to run the panel through the in-line water
wash. We could not guarantee flash off of the flux.
P.S. The no clean we use is water soluble. Some are not.
2) Why clean an RMA. Leaving it on is safer than a poor cleaning job.
And all bench cleaning (with a brush...etc) is a poor cleaning job.
______________________________ Reply Separator _________________________________
Subject: Subj: No-clean Repair
Author: [log in to unmask] at internet
Date: 11/6/96 1:37 PM
I have a question concerning repair of a CCAs soldered with
no-clean flux (hand soldered and/or wave soldered).
If you need to repair/rework the CCA, do you use an RMA flux
for the repair/rework or no-clean flux? If you use a
no-clean flux, how do you know if you have flashed off all
the flux that was applied? Wave soldering pretty much
covers the entire bottom side flashing off the no-clean
flux, however, a soldering iron may not do that.
If you use an RMA and clean then it would seem you are
defeating the purpose of the no-clean. Will that cause a
problem since the rest of the CCA was soldered using
no-clean?
I have heard of cleanable no-cleans, but, what if you are
not using a cleanable no-clean. Could someone straighten me
out on this issue? Thanks!
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