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Date: 12/27/01 at 6:37 AM
Posted by: Prabha
E-mail: velu@pn3.vsnl.net.in

I manufacture a digital panel meter circuit to measure AC voltage upto 500 volts. In this circuit, when I interchange the input terminals - phase to nuetral - the LED display is not stable. I found the reason is, due to residual no-clean flux near the display driver IC on the PCB. This does not improve with cleaning in Iso-propyl alcohal. With RMA flux and cleaning with IPA, I could elliminate this problem. But I can not keep interchanging between no-clean and RMA flux in the wave soldering machine. Can some one help me how I can thoroughly clean the residues of no clean flux.
Prabha

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  Re: Flux Cleaning danilo   Posted at: 01/31/02 (0)

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