Electronics Forum | Wed May 30 18:28:13 EDT 2007 | russ
you are sure that noone has brought in any alcohol based no clean flux? R
Electronics Forum | Tue Feb 01 03:28:49 EST 2000 | Guo Yingchun
Hi, I want to use ultrasonic machine to remove solder paste from PCB. Can I use water as the solvent? Will it do harm to the PCB? Thanks in advance.
Electronics Forum | Thu May 24 16:59:49 EDT 2007 | pjc
Is wash temp the same in the new washer? I'm thinking that may be a clue. Are you sure nothing else changed, like water supply at all- conditioner? Do you have a supply of DI water?
Electronics Forum | Thu May 24 17:11:22 EDT 2007 | colormaker
Everthing is the same. I did not check water temp or wash cycle time. No DI just straight from water supply. How do I do the DI ? Jerry
Electronics Forum | Thu May 24 23:07:55 EDT 2007 | colormaker
Our filter removes all contaminates authou it takes forever to evaporate 20 gallons it work quite well. I will check with local water supply for mineral analysis. Will a water softener remove the minerals that may be causing the problem ?
Electronics Forum | Fri May 25 13:32:26 EDT 2007 | colormaker
We have 4 diffrent boards that have the problem. The boards have two diffrent suppliers. I dont think this is the case. I more leaning toward not enough rinse cycles in the washer. Jerry
Electronics Forum | Thu May 24 14:44:42 EDT 2007 | colormaker
We use a washer soluable solder flux for our solder wave. We then wash the boards in a dishwasher. We have done it this way for years without problems. We just got a new dishwasher and now we get residue on the solder (white marks) Anyone know of wh
Electronics Forum | Fri May 25 12:27:32 EDT 2007 | bschreiber
You should also check the quality of your compressed air. If the proper filters and desiccants are not in place, you could be recontaminating your washed boards with condensed water and oil residues from the compressed air used for drying. Bill Sch
Electronics Forum | Thu May 24 22:33:07 EDT 2007 | slthomas
By purchasing or leasing a DI system and supplying it for your final rinse, at least. You'll avoid some troublesome ionics on your boards that way. Kind of off topic, but are you filtering or boiling off your washer's waste water or are you sending
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