Help: Extracting Agnus!
Petros Michalis
chips but none of them was square...I don't have a chip puller for
square chips so I was wondering if someone has 1. a part number for
a square chip puller (Radio Shack) or/and 2. suggestions how to do
thesame job with a regular chip puller or/and 3. does the square
protective plastic shield around Agnus needs to be removed as well?
Thank you in advance for any comments/suggestions,
Petros
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Petros Michalis // email:
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Bernd Stieler
PM> From: mich...@panix.com (Petros Michalis)
PM> I'd apreciate if someone can help me with this. I've extracted many
PM> chips but none of them was square...I don't have a chip puller for
PM> square chips so I was wondering if someone has 1. a part number for a
PM> square chip puller (Radio Shack) or/and 2. suggestions how to do thesame
PM> job with a regular chip puller or/and 3. does the square protective
PM> plastic shield around Agnus needs to be removed as well?
PM> Thank you in advance for any comments/suggestions,
To 1: I only could give you an address in Germany, where you can order such a
PLCC-Chippuller. If you need this, contact me again. To 2: I think, it's not
possible.
To 3: If you possess the special PLCC-Chippuller, it is not necessary to remove
the plastic shield.
Alternatively you can try the following: Take two small screwdrivers and form
the ends to an about 60 degree-angle. Then put these ends into the small holes
on two corners of the chip. Try very carefully to lift up the chip. If you want
to replace the agnus and don't need the agnus any more, you'll get it out in
that way.
Cu, Bernd
Captain Slug
motherboard and the chip socket (don't remove the socket BTW).
Presumably, you could remove the motherborad entirely and push the chip
out by poking two narrow objects through these holes ?
Then there's the old trick of gluing a nut ont the top of the chip and,
after it has dried on there, inserting the screw and using same as a
handle.....
I personally used a screwdriver and pried mine out (after being explicitly
warned not to) and it worked mostly OK, and didn't totally destroy the
socket.
A/B Roll is also known as g3...@jupiter.sun.csd.unb.ca
If at first you don't succeed, try again. Then give up. No sense in
being a fool about it.
Shad Valley Calgary 1991: The same but different....
Stephen D. Holland
-Steve
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Maxwell Daymon
screwdriver. Look for an extractor.
------------------
Maxwell Daymon
mda...@rmii.com
------------------
Russell Shaw
These work well because the needles get right under the chip to give good
leverage.
If you lever from the corners with less pins, alternating from one side
of the chip to the other, the chip soon pops out, and the pins don't get
bent at all.
Prying from both corners at the same time might work even better!
George Ivy
puller. It is a standard in stock item, and sells for about 10 bucks.
It looks like a metal jaw, with a plastic cover. Works great.
Robert Byrne
In article <3ncecc$o...@central.co.nz> ru...@central.co.nz
(Russell Shaw) writes:
I don't know about other models but the A500 had a hole in the circuit
board directly beneath the Agnus so you could push from the other side.
-- Bob
: Robert (Bob) Byrne : rby...@3dform.edex.edu.au :
: Amiga A3000/25 : Ballina, NSW Australia :
John Marchant
In article <3ncecc$o...@central.co.nz> ru...@central.co.nz (Russell Shaw)
writes (re extracting Agnus chip):
> I've seen a pair of dividers from a compass set used before. These work
> well because the needles get right under the chip to give good leverage.
When the Wang engineer came to me to extract my 4000 buster chip (Rev.9) he
used a dental pick. He said someone had nicked his proper tool, and it took him
about 10 seconds to extract the buster - about the same size & shape as an
Agnus.
John
-------------------------------------------------------------------
John Marchant ('Gnome'). Bedford UK. CBM Amiga 4000/40
gn...@martinac.demon.co.uk (Fidonet 2:2500/167.15)
By the time I think I've got the answer I've forgotten the question
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Jim Harvey
In a previous article, gn...@martinac.demon.co.uk (John Marchant) says:
> In article <3ncecc$o...@central.co.nz> ru...@central.co.nz (Russell Shaw)
> writes (re extracting Agnus chip):
>
> > I've seen a pair of dividers from a compass set used before. These work
> > well because the needles get right under the chip to give good leverage.
>
>When the Wang engineer came to me to extract my 4000 buster chip (Rev.9) he
>used a dental pick. He said someone had nicked his proper tool, and it took him
>about 10 seconds to extract the buster - about the same size & shape as an
>Agnus.
>
>
a sheet metal tweezers sort of thing that required some filing to actually
enter the recesses on the chip corners. It worked, barely. You can buy
pullers like this for only a couple of $US.
I have heard, though I don't recall verifying, that there is a hole in the
motherboard under Agnes. You can remove the entire motherboard (not a
trivial task), put it on your lap and push the chip out. Make sure you
are grounded, and connected to the Motherboard
ground for static reasons!
--
Jim Harvey - WB8NBS - 18538 Inkster - Redford, Mich. 48240 Amiga Person
ac...@detroit.freenet.org | James.B...@x400gw.ameritech.com
Ian Moor
> In article <3ncecc$o...@central.co.nz> ru...@central.co.nz (Russell Shaw)
> writes (re extracting Agnus chip):
>
>When the Wang engineer came to me to extract my 4000 buster chip (Rev.9) he
>used a dental pick. He said someone had nicked his proper tool, and it took him
>about 10 seconds to extract the buster - about the same size & shape as an
>Agnus.
Anything like that pushes down and out on the socket and sockets are
not made to take any force. I tried very carefully with a small screwdriver,
almost immediately a small crack appeared. I quit and went to find a
proper tool and after pulling out the agnus used a drop of superglue to
fix the crack. I worked out it was less time and effort to find the tool
than replace the socket; who wants to solder a new one on their precious
motherboad.
--
Ian Moor
i.m...@doc.ic.ac.uk
Rick Bowers
Moor) wrote:
> In article <3nte2s$j...@detroit.freenet.org> ac...@detroit.freenet.org
(Jim Harvey) writes:
>
> > In article <3ncecc$o...@central.co.nz> ru...@central.co.nz (Russell Shaw)
> > writes (re extracting Agnus chip):
> >
> >When the Wang engineer came to me to extract my 4000 buster chip (Rev.9) he
> >used a dental pick. He said someone had nicked his proper tool, and it
took him
> >about 10 seconds to extract the buster - about the same size & shape as an
> >Agnus.
>
As always, it's always best to use the proper tool so as not to cause damage.
Since both the Buster and Agnes chips are PLCC chips, the proper tools is
a PLCC chip puller. It's about $10-$15 ($US) for even a cheap one, but
that's a small price to pay as oposed to the cost which _could_ be
incurred by damage to a chip socket and/or motherboard.
-Rick
Jaco Schoonen
> I have heard, though I don't recall verifying, that there is a hole in the
> motherboard under Agnes. You can remove the entire motherboard (not a
> trivial task), put it on your lap and push the chip out. Make sure you
> are grounded, and connected to the Motherboard
> ground for static reasons!
I can confirm that there are two holes under Agnus. At least in my old A2000
rev 4.4. Does anyone know whether there are such holes under the Buster-chip
in the A4000? I don't feel like removing the motherboard just to find out
that there aren't such holes...
--
Jaco Schoonen
(ja...@stack.urc.tue.nl)
Frank J. Beckmann
:
: > I have heard, though I don't recall verifying, that there is a hole in the
Did you hear about a tool called "plcc puller"? It's nice!
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Have a nice day Frank
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Timothy Cochran
w/o destroying the chip AND w/o spending a penny...Jeopardy theme music. ;)
And the question is......
>< |\/| |2 -------
urba...@ct.picker.com
>Subject: Re: Help: Extracting Agnus!
>From: x...@vlogic.cybernetics.net (Timothy Cochran)
>Date: Sun, 14 May 95 07:10:23 EDT
>Is there a way to get the Agnus (A500) out w/o pulling out the motherboard and
>w/o destroying the chip AND w/o spending a penny...Jeopardy theme music. ;)
No, But for 5.00 you can get an extractor from OK Industries
part number ex-5
Fax 914-969-6650
(Much less expensive than a gnarled chip holder/motherboard.
al
C. Deforrest Smith
>Is there a way to get the Agnus (A500) out w/o pulling out the motherboard and
>w/o destroying the chip AND w/o spending a penny...Jeopardy theme music. ;)
>
"Alex, what is, borrow a PLCC puller from someone cool?"
Or take two screwdrivers and carefully pry the corners, but don't cry to me
when/if you nuke it.
Cheap PLCC pullers are $15-ish, and if you do this a lot, it's worth having,
but of course I've seen $50 PLCC pullers too...
I don't know, it just wasn't a big deal, I just popped my Agnes right out.
*shrug*
Be careful out there..
cds
--
Sic gorgiamus allos subjectatos nunc.
gn...@martinac.demon.co.uk
In a message of 14 May 95 Timothy Cochran wrote:
TC> Is there a way to get the Agnus (A500) out w/o pulling out the
TC> motherboard and w/o destroying the chip AND w/o spending a
TC> penny...Jeopardy theme music. ;)
Yes. Despite all the various suggestions (like get a proper extractor tool),
and dire warnings about damaging the socket, I've never had any problem
extracting an Agnus.
Get a small instrument screwdriver, or a draughtsman's divider or compass with
sharp point, and slowly prize up the two corners where there's a slot, a
millimetre or so at a time. Then do the other corner. Keep changing corner,
trying to keep the chip as level as possible. Ignore creaking sounds but stop
instantly if the socket actually begins to crack (it never did for me). Mind
you, it doesn't do the spike much good so don't use an expensive drawing
instrument: a cheap schoolkid's compass is fine.
Better still, use two spikes & lever the corners together, SLOWLY.
If you do it slowly & carefully, the chip will suddenly pop out. And if you
_do_ break the socket, don't blame me. It's entirely your choice if you do it
this way & I accept no blame.
I saw a qualified Wang service engineer do it with a dental pick in about 10
seconds, but I consider this too quickly for safety!
Sherwood Stockwell
off nicely, and a drop of superglue. Be
carefull to place this dead center on
the Agnus, so when you lift up it
doesnt come out skewed.
Can you beat that for cheap?
Sherwood Stockwell
COMPUTERSMITH Customer Service
: (Russell Shaw) writes:
:
: > I've seen a pair of dividers from a compass set used before.
: > These work well because the needles get right under the chip to give good
: > leverage.
: > If you lever from the corners with less pins, alternating from one side
: > bent at all.
: >
: > Prying from both corners at the same time might work even better!
BE CAREFUL! The Agnus socket on newer Amiga's holds this IC MUCH tighter,
and will let you get away with MUCH less when not using the correct tool.
BTW, I bought the correct tool in Toronto (Canada) years ago for under
$20.00 .
Allen Smith
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J.J. Evers
case and on the bottom there are to holes below the agnus.. Just use a
flat head screw driver (I use a torx) to gently push the agnus out!
make sure you alternate between the holes so it comes
out even..
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Brent B. McCrackin
In article <3q1nqb$5...@muss.CIS.McMaster.CA> u940...@muss.cis.McMaster.CA (J.J. Evers) writes:
> The best way to remove an agnus is to unscrew the motherboard from the
> case and on the bottom there are to holes below the agnus.. Just use a
> flat head screw driver (I use a torx) to gently push the agnus out!
> make sure you alternate between the holes so it comes
> out even..
However, on an A2000, the underside of the motherboard is covered by a metal
shield, which requires the removal of the bolts for ALL the I/O connectors to
get off.
The method I used to get my Agnus out, and it took a while, was to 'creep' it
out with a knife. I just went around the edges of the chip with the knife until
it eventually popped out of the socket. Don't use too much pressure or try to
go too fast or you'll shatter the socket (I heard mine snapping a bit at first,
but managed to avoid breaking it).
The absolute best method is to get a PLCC Chip puller, though. Much faster, and
much easier.
--
Brent Bryan McCrackin
St. Catharines, Ontario
bmcc...@chardonnay.niagara.com
Just because the world is ruined by MicroSoft, doesn't mean I have to be.
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