Hi guys
I have to change a QFP128 chip for a repair I am doing. I've replaced 48 pin QFP chips (such as AS-15) before a few times but never a QFP128
With the AS-15 I basically add some 60/40 solder to the pins all around to reduce the melting point, apply flux and use the hot air station to unsolder.
I then use drag soldering with 60/40 and use flux plus desolder braid to clean up the shorts between pins and a jewellers loop for close examination of the work
I was thinking maybe of trying the same technique on the QFP128 but maybe to use something like Quick Chip low melt solder
Just to make things more complex this is a double sided PCB with a lot of SMDs on the other side underneath where the qfp128 is
Any suggestions?
Rich
I have to change a QFP128 chip for a repair I am doing. I've replaced 48 pin QFP chips (such as AS-15) before a few times but never a QFP128
With the AS-15 I basically add some 60/40 solder to the pins all around to reduce the melting point, apply flux and use the hot air station to unsolder.
I then use drag soldering with 60/40 and use flux plus desolder braid to clean up the shorts between pins and a jewellers loop for close examination of the work
I was thinking maybe of trying the same technique on the QFP128 but maybe to use something like Quick Chip low melt solder
Just to make things more complex this is a double sided PCB with a lot of SMDs on the other side underneath where the qfp128 is
Any suggestions?
Rich
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