Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!network!ucsd!ucbvax!hplabs!hpfcdc!hpldola!ritchie From: ritchie@hpldola.HP.COM (Dave Ritchie) Newsgroups: comp.sys.ibm.pc Subject: Re: Desoldering Chips Message-ID: <11250088@hpldola.HP.COM> Date: 14 Aug 89 01:37:10 GMT References: <1846@uceng.UC.EDU> Organization: HP Elec. Design Div. -ColoSpgs Lines: 18 >A simpler solution is to destroy the board with a pair of dykes and clean >the legs off after the fact. The torch trick sounds a little radical for >heat sensitive devices (not to mention human breathing apparatus). >---------- A better way is to place the iron tip on the leads on the top side of the board and use an solder sucker (the blue plastic one from Radio Shack is good) to remove the solder from the holes on the bottom. By applying heat from the top and using the iron to bend the pins away from the sides of the holes, you can remove most any IC (the problem being that if you heat the hole on a pin hooked to a ground/power plane, it takes incredable amounts of heat to free the pin - heating the pin from the top, along with placing pressure on the pin to center it in the hole causes the solder to flow away from the *pin*, producting the desired result). This method caused little or no damage to the board or the IC. Dave Ritchie