Anyone have data as to what can happen if you remove (should actually say ATTEMPT to remove) rosin flux residues with DI water? Long story short, we buy a transformer that the mfr told me is soldered with rosin, medium activity flux. Their cleaning process is "scrape flux residues with a knife"....enough said about that... We solder with organic high activity and clean with DI water. Guess what - return from field with fire on the pcb...burned out a trace through the PCB under the power pin of the transformer. Since learning of the above info, I am inclined to think maybe the rosin residue could have trapped water or OR flux / flux residues and created a nice little corrosion spot. Anyone have opinions or experience on what can happen if you try to clean the "no clean" with just water? --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------