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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: darkcoder on October 01, 2010, 06:40:54 PM

Title: mount and dismount a PGA FPU
Post by: darkcoder on October 01, 2010, 06:40:54 PM

hello

 I have bought (from a nice user of this forum) a 68882 PGA for my Blizzard 1230 mk IV.

The board has (as normal) a socket for the chip. Considering that I am not very good in electronics and, in general, with manual activities, would you suggest searching for a more experinced person to mount the chip in the socket? Is it a difficult operation?

Also, I may decide, possibly, to dismount the FPU in the future. Is it difficult to do it?

Title: Re: mount and dismount a PGA FPU
Post by: tone007 on October 01, 2010, 07:08:51 PM

I've done it with a flathead screwdriver and some gentle, even prying around the chip.  There's probably a proper PGA extractor tool around somewhere, though.

It really isn't very hard, though.

Title: Re: mount and dismount a PGA FPU
Post by: jsixis on October 01, 2010, 07:41:01 PM

get the proper tool to remove the old chip, most likely less then 12 bucks.
Super easy, insert the tool, squeeze the handle.

You should follow good grounding practices

Title: Re: mount and dismount a PGA FPU
Post by: Xanxi on October 01, 2010, 08:27:45 PM

Do not worry, i am not good at manual activities either and however i can mount or dismount a PGA cpu with ease. Juste use a small screwdriver to remove it by pulling gently on all sides. To mount it, just ensure all pins are straight with the pinholes and push firmly.
Can't be easier :-)

Title: Re: mount and dismount a PGA FPU
Post by: gertsy on October 02, 2010, 12:13:18 PM

Mounting the chip is fairly simple.  No need of a flathead screwdriver or an extraction tool, in that case.

1.  Make sure you are statically earthed
2.  Remove the card from your A1200 and place it on a flat firm insulated surface. (EG: Upsidedown mouse mat on a level table)
3.  Note the proper orentation of the FPU, check all the pins are straight (look it up in the Amiga Hardware DB if not sure http://amiga.resource.cx/exp/blizzard1230mk4)
4.  Place the FPU carefully over the socket in the correct orentation (Remember, get it right, dont bend any pins)
5.  Provide level, equal, firm & constant pressure to seat the chip into the socket.  (You will feel a distinct drop as it locks into place.

As far as taking it out again.. Why??  It's found a home and should live there forever now.

@Xanxi, you have too many computers...