Advice on Desoldering an IC

[W2HX]

I would not attempt any desoldering without my hakko 808. I never leave home with out it. While you are sucking and heating the pin, wiggle the pin and it work great. I've desoldered 40 pin chips without trouble, they drop right out of the board. I desoldered this 40 pin chip from a working device just to try it in another device I was repairing. Then I put it back. I had no concern about damaging the chip. I used to use the wick/sucker approach from childhood until about 20 years old. I always hated the results. Hakko is a game changer for me.

73 Eugene W2HX
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-----Original Message-----
From: cctalk <cctalk-bounces at classiccmp.org> On Behalf Of Rob Jarratt via cctalk
Sent: Friday, April 15, 2022 1:50 PM
To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org>
Subject: Advice on Desoldering an IC

I am trying to remove an IC from my PDP 11/24 CPU, a DS8641. I am really struggling to desolder it. I am using the technique of applying fresh solder and then removing it. But after multiple cycles of this I think I am starting to damage the PCB.

 

I am using a fairly cheap desoldering station (this one https://cpc.farnell.com/duratool/d00672/desoldering-station-uk-eu-plug/dp/SD
01384?st=duratool%20desoldering). Its spec in terms of vacuum pressure is equivalent to that of the professional Hakko ones though. I am also trying a hand desoldering pump. None of these are able to clear many of the holes of solder, although some are doing better than others. Nevertheless, the IC remains stubbornly unmoving.

 

Are there any tips for removing ICs?

 

Thanks

 

Rob