You can straighten pins with a credit card or three, whatever fits in the spaces between the pins, then go at 90 degrees to the bent pin. After getting all 4 sides, the pin should be straight.
On Mon, Nov 2, 2009 at 4:07 AM, Gregg Eshelman <[email protected]> wrote: > > --- On Sun, 11/1/09, Gorka L Martinez Mezo <[email protected]> wrote: > > > I have a Performa 631 with the standard 68LC40 processor > > (no heatsink). The > > CPU is socketed but I have never tried to extract it. > > > > Could the 68LC40 be replaced straight away with a full > > 68040 as fitted to > > the Quadra 630? Do I need any special tools to remove the > > original CPU? > > Yes, you can replace the CPU with the full 040. > > The ideal method of removing the CPU is with a puller. It's a two part tool > with an outer "U" shaped piece with the ends covered to protect the board > and an inner, spring steel "U" with the ends bent in to catch two edges of > the chip. A screw is used to pull up on the inner part to pull the chip. > > Those might not be easy to find these days since PGA style chips and > sockets aren't very common. > > I never used one back in the days before ZIF sockets. I just used a small, > flat blade screwdriver and carefully pried up a little at a time on each > edge until the chip was out. > > DayStar sent a puller with any of their CPU upgrades and adapters that > required pulling chips. (Except for the IIcx, you had to verify the CPU was > socketed before they'd send the puller - after they had some people destroy > their boards trying to pull soldered CPUs.) > > If you bend a pin, here's the perfect tool for straightening them. Find a > syringe needle that will just slip over the pin and grind the point off so > its straight. Use a sharp and pointy knife to deburr the inside of the > needle after grinding it. A metal file should work, just slower than a > Dremel or bench grinder. > > The needle lets you get to any pin without touching the ones around it. > Look sideways across the chip from all directions, the slightest bend in a > pin will show easily. > > > > > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are a member of the Vintage Macs group. The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/vintage-macs Support for older Macs: http://lowendmac.com/services/ -~----------~----~----~----~------~----~------~--~---
