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- Newsgroups: comp.sys.mac.hardware
- Path: sparky!uunet!panther!mothost!lmpsbbs!quest.comm.mot.com!butler
- From: butler@quest.comm.mot.com (Jim Butler)
- Subject: Re: Desoldering for Mac IIsi upgrade
- Reply-To: butler@quest.comm.mot.com (Jim Butler)
- Organization: Land Mobile Products Sector, Motorola, Inc.
- Distribution: usa
- Date: Thu, 21 Jan 1993 23:41:01 GMT
- Message-ID: <1993Jan21.234101.672@lmpsbbs.comm.mot.com>
- References: <4235@master.CNA.TEK.COM>
- Sender: news@lmpsbbs.comm.mot.com (Net News)
- Nntp-Posting-Host: 145.1.80.31
- Lines: 56
-
- In article <4235@master.CNA.TEK.COM>, florianb@chip.tek.com (4516) writes:
-
- >=>
- >There have been several tips offered on desoldering the stock crystal
- >in the IIsi. This may help others.
-
-
- >I took over and used my old trusty soldering iron
- >(which any self-respecting EE would guffaw at) and some desoldering
- >wick. I had the crystal out in 5 minutes.
- >
- >Desoldering wick is a braided copper tape which you press against
- >existing solder with an iron. When the solder liquefies, it is
- >immediately wicked up and away from the board. In my hands at least,
- >it makes desoldering easy and I prefer it 100 X over anything else.
- >I haven't checked, but you can probably get it in your favorite local
- >electronics retail shop.
- >
- >I think the biggest challenge is to keep from slipping with the iron.
- >It takes quite a lot of force to get the old xtal out.
- >
-
-
- In my experience solder wick leaves a lot of residue behind. I
- personally do not want that on my board, nor do I want to have to
- clean it off.
-
- If it took "quite a lot of force to get the old xtal out" then I
- would re-think my attack. I've had problems ruining the solder pads on
- PC boards that I forced things out of, and I would suggest that force
- not be used, if possible.
-
- I've seen some talk on the net about the irons available from
- Radio Shack with the built-in de-soldering bulbs. These sound like the
- best approach to me.
-
- I generally use a 'solder sucker' to de-solder; almost all of the solder
- gets sucked out, which allows the part to be removed without much force
- (note: if a small amount of solder remains in the hole, wiggle the
- protruding lead and break the connection...the part will then easily pull out).
-
- However, solder suckers have the downside that they impart a recoil to the
- PC board when the are "triggered" (i.e., when they "suck"). Also, they
- compete with the iron tip for space. For these reasons, the Radio Shack
- irons, with their bulbs, sound like a good idea to me.
-
- For what it's worth,
-
- Jim
-
- ---------------------------------------------------------------------------
- Jim Butler | Internet: butler@comm.mot.com
- Motorola, Inc. |
- Shared Systems Division | Phone: 708-576-5962
- Schaumburg, Illinois USA |
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