Re: tool for extracting BIOS chip ?
- From: "Bill Schaible" <mr.correct@xxxxxxxxxxx>
- Date: Sat, 3 Dec 2005 02:25:16 -0800
Paul,
Thank you for the info and the time you spent writing. I just got back from
the used computer warehouse where I looked through a pile of old mainboards
to see the different physical kinds of BIOS chips. Also, I've been visiting
a website called Wim's BIOS to read about tinkering. I've been planning to
build a new PC and one of my requirements is that it have a socketed BIOS so
I can tinker with BIOS Savior. I don't find any Intel MOBOs with sockets.
I've decided on ASUS P4P800SE - I've built several PCs with ASUS boards in
the past. Another guy here, Ron, pointed out I can get the chip tool free
with BIOS Savior - which is something I'd forgot about.
What line of work did you have where you replaced hundreds of EPROMS ?
Bill S.
"Paul" <nospam@xxxxxxxxxx> wrote in message
news:nospam-0112050606580001@xxxxxxxxxxxxxxxx
> In article <MtSdneMgKLCdORPeRVn-jA@xxxxxxxxxxx>, "Bill Schaible"
> <mr.correct@xxxxxxxxxxx> wrote:
>
> > Where can I get tools for extracting and inserting PLCC type Intel 82802
> > BIOS chip in a MOBO socket?
>
> Extract with this tool. Pull up evenly so the chip leaves the
> socket on all sides, at the same instant.
>
> http://www.radioshack.com/product/index.jsp?productId=2062619&cp
>
> It is also possible to extract, with a sharp pointed instrument.
> You pry up on diagonal corners of the chip, and try to pull
> the chip out evenly. By not rocking the chip (pulling out
> crooked), you are avoiding bending of the socket contacts.
>
> Insertion is done with your thumb. You press evenly, so the chip
> goes in square. I have never seen a fancy tool for insertion.
>
> Before removing the device, make a diagram of the alignment marks
> on the top of the IC and the top of the socket. The socket may
> have a small triangle stamped in the plastic. The IC may have a
> circular indent, in the vicinity of the triangle on the socket.
> Reproduce that alignment when putting a chip back, and make
> sure the chip is face-up.
>
> The style of the Radio Shack tool above, is the cadillac of
> extractors. There is another extractor, which is a simple
> band of metal, with a vinyl plastic coating on the handle.
> The metal band is sort of horse shoe shaped.
>
> The business end of both tools, has metal lips that go
> underneath the corners of the chip. The lip is what allows
> the user to pull upwards and bring the chip out of the socket.
> When using a sharpened tool, like something shaped like an
> awl, you are scraping against the side of the chip, and
> not getting underneath. So, naturally, there will be more
> damage to the chip in a case like that. I've probably
> inserted and removed a couple hundred of these chips, using
> the sharpened pointed object, but the extractor does make
> it pretty easy. Here is a side view, of a proper extraction
> tool, with the lip on each side getting underneath the
> chip. That is why the diagonal corners of the chip socket,
> have two air gaps - to leave room for the tool to get
> underneath the chip.
>
> | +-------------------------+ |
> | | Flash EEPROM | |
> | +-------------------------+ |
> +------- -------+
>
> After a chip has been pulled and reinserted five times,
> the fit into the socket will be a lot easier.
>
> In ideal circumstances, you want the PCB to be supported
> mechanically, when pulling or pushing on the socket. The
> electronics I was working on, was not a motherboard, but
> a similar form factor. I would put the board on a workbench,
> and make sure the board would not get bent while working
> on the socket.
>
> HTH,
> Paul
.
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- From: Bill Schaible
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