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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