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Brennan
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 Posted: Fri Sep 29, 2006 12:57 pm Post subject: How to Remove chips/processors from PCB? |
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From time to time I come across chips that I want to remove from NIC cards, mpotherboards, etc. Sometimes using a screndriver is successful but about halfd the time it destorys the chip so I figured there has got to be a good method for remvoing chips from PCB.
Any ideas would be much appreciated!! |
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CPUShack
Joined: 16 Jun 2003
Posts: 34259
Location: State of Jefferson, USA
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JAC
Joined: 24 Jul 2005
Posts: 3469
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| Posted: Fri Sep 29, 2006 1:22 pm Post subject: |
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a blow torch produces interesting results.
.. and fumes and flames .. interesting.  |
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chip68
Joined: 19 Oct 2004
Posts: 1024
Location: Central Pennsylvania
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| Posted: Fri Sep 29, 2006 1:40 pm Post subject: |
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I still say if you don't have 400 pins to desolder, a vacuum desoldering tool works best - even on PTH boards. Much less residual solder on the pins, and less chance of damaging the chip or the PCB.
- CMW |
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Root
Joined: 11 Mar 2006
Posts: 64
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| Posted: Fri Sep 29, 2006 3:33 pm Post subject: |
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I use heat gun 
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Guest
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| Posted: Fri Oct 06, 2006 11:41 am Post subject: |
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| CPUShack wrote: | yah a hot air gun works wonders
in a pinch a toaster oven works well too
-John |
So is the gial to heat the PCB to the point that the is mallible enough to pull the chip pins out without damaging the ship?
What is a heat gun/hot air gun? Where could I get one?
I work in an IT dept and we throw away alot of stuff and so Ive starting pulling the processors out of these items lioke phones, Cisco routers, etc.
Thanks for your help!! |
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Brennan
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| Posted: Fri Oct 06, 2006 11:42 am Post subject: |
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| CPUShack wrote: | yah a hot air gun works wonders
in a pinch a toaster oven works well too
-John |
So is the goal to heat the PCB to the point that the is mallible enough to pull the chip pins out without damaging the ship?
What is a heat gun/hot air gun? Where could I get one?
I work in an IT dept and we throw away alot of stuff and so Ive starting pulling the processors out of these items lioke phones, Cisco routers, etc.
Thanks for your help!! |
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JAC
Joined: 24 Jul 2005
Posts: 3469
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| Posted: Fri Oct 06, 2006 11:47 am Post subject: |
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yeah.. most 60/40 ( "standard" lead solder) melts around 180 degrees centigrade. .. you can probbaly use an oven sent to this temp or lower. bake it for a few minutes, then pull it out and tap the board and the components shoudl drop off/out. I havent done this, so maybe someon will come along and comment on it.
A hot air gun is probably best, as you can just get the bits off you want, and you dont need an oven. Faster too. |
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Cpuswe
Joined: 15 Mar 2005
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Location: Karlskrona, Sweden
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CPUShack
Joined: 16 Jun 2003
Posts: 34259
Location: State of Jefferson, USA
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| Posted: Fri Oct 06, 2006 12:35 pm Post subject: |
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| JAC wrote: | yeah.. most 60/40 ( "standard" lead solder) melts around 180 degrees centigrade. .. you can probbaly use an oven sent to this temp or lower. bake it for a few minutes, then pull it out and tap the board and the components shoudl drop off/out. I havent done this, so maybe someon will come along and comment on it.
A hot air gun is probably best, as you can just get the bits off you want, and you dont need an oven. Faster too. |
oven method works pretty good
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JAC
Joined: 24 Jul 2005
Posts: 3469
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| Posted: Fri Oct 06, 2006 12:38 pm Post subject: |
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| CPUShack wrote: | | JAC wrote: | yeah.. most 60/40 ( "standard" lead solder) melts around 180 degrees centigrade. .. you can probbaly use an oven sent to this temp or lower. bake it for a few minutes, then pull it out and tap the board and the components shoudl drop off/out. I havent done this, so maybe someon will come along and comment on it.
A hot air gun is probably best, as you can just get the bits off you want, and you dont need an oven. Faster too. |
oven method works pretty good |
I still like the blow torch.. the portable type plumbers use.  |
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chip68
Joined: 19 Oct 2004
Posts: 1024
Location: Central Pennsylvania
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| Posted: Fri Oct 06, 2006 12:43 pm Post subject: |
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| Anonymous wrote: | | So is the gial to heat the PCB to the point that the is mallible enough to pull the chip pins out without damaging the ship? |
Ideally the goal is to remove the solder from all the pins before attempting to pull the chip. Heat guns are great for surface mount parts, but a little brutish for through-hole extraction. They are, however, fairly inexpensive and more readily available.
- CMW |
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chip68
Joined: 19 Oct 2004
Posts: 1024
Location: Central Pennsylvania
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| Posted: Fri Oct 06, 2006 12:44 pm Post subject: |
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| JAC wrote: | | I still like the blow torch.. the portable type plumbers use. |
Why am I not surprised? 
- CMW |
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chip68
Joined: 19 Oct 2004
Posts: 1024
Location: Central Pennsylvania
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| Posted: Fri Oct 06, 2006 12:46 pm Post subject: |
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| CPUShack wrote: | | oven method works pretty good |
Gives the phrase "would you like chips with that?" a whole new meaning. 
- CMW |
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JAC
Joined: 24 Jul 2005
Posts: 3469
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| Posted: Fri Oct 06, 2006 12:46 pm Post subject: |
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| Bake it in the oven, pul it out.. tap the board on the back with a piece of wood on the back.. the stuff shoudl fly off.. maybe do it outside on the grass.. saves needing a soft landing that ius heatresistant. also the fumes shoudl disperse easily.... set up an old oven in the back yard. Use a thick pair of gardening gloves to handle the board. |
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