Advice on Desoldering an IC

[John H. Reinhardt]

I bought a Hakko FR301-03 in mid 2020 and, while I haven't used it for a lot, I can attest it has worked very well for what I have done.  I have used it to replace the RIFA caps on the boards of 3 H7864 power supplies and the pico fuses on several KDJ11-B 11/73/83 CPU boards.  In each case the solder was removed quickly and the parts literally dropped off the boards.  I have also used it to rework some badly soldered (by me) sockets on a QBone card I was assembling.  While it was relatively expensive (to me) it has been worth the cost.

John H. Reinhardt



On 4/15/2022 4:32 PM, Rob Jarratt via cctalk wrote:
> I do have some diagonal cutters, but although small they seem to be still too bulky to reach the pins. I will have to try to find some finer ones. These seem to look OK: https://uk.farnell.com/klein-tools/d275-5/wire-cutter-diagonal-127mm/dp/2839543
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> Also, I have seen the recommendations regarding a Hakko 808. It looks like the modern successor is the FR301 https://www.hakko.co.uk/product/fr-301-portable-desoldering-gun/. I think what may be better about this is the wider choice of nozzles.
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> Regards
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> Rob
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> From: Chris Zach <cz at alembic.crystel.com>
> Sent: 15 April 2022 18:51
> To: rob at jarratt.me.uk; Rob Jarratt <robert.jarratt at ntlworld.com>; General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org>; Rob Jarratt via cctalk <cctalk at classiccmp.org>
> Subject: Re: Advice on Desoldering an IC
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> Cut the pins with a very sharp set of dykes then remove them one at a time. Then use flux and detailer braid to remove the solder
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> On April 15, 2022 1:49:33 PM EDT, Rob Jarratt via cctalk <cctalk at classiccmp.org <mailto:cctalk at classiccmp.org> > wrote:
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> 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.
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> 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.
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> Are there any tips for removing ICs?
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> Thanks
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> Rob