What kind of flux are you using ? Boards may be oxidized. Try a more
aggressive flux.
                                                                 
                                                                 
                                                                 

Brs, Johannes



I have a serious problem on some of the board that stucked in the store.
All of them is at least 2 years.
When I  wave-soldered the bare board, it has a lot of blow-holes, solder
balls, pin-holes.

Anyway, I try to purge all of them, but there are 6000 pieces in the Store.

I try to bake at at 100 deg. C for 4 hours. Too bad, it doesn't work.

I try to bake for any 4 hours just before wave-soldering. The result is
terrible. Not even a slight Help !!!

Can anybody give me some advises what should I do ???

Thanks in Advance

Poh ..







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