How to remove a HP PA-RISC 8600?

[Xaar]

Hello!

I got a fully functional HP Workstation b2600 yesterday. Now I wanted to take a look at the cpu (part number is 3AA1-1106). It seems, that this cpu is in a CLGA package, but how to remove it without destroying neither the cpu nor the mainboard? I only want to take a look on the bottom side of the cpu (and possibly find a way to test following cpus in the future ).

Here is a photo of the non-removed 3AA1-1106 (click to enlarge):


I have seen photographs of an SUN UltraSPARC (II or III) whose mounting looks similar to this one. Does anyone have an idea how to proceed?

Thanks a lot

[doccybrown]

It`s sitting tightly in the contacting socket
so you would to have pull strongly...
Sometimes the contacting pads get destroyed
by doing this so if you want to keep the B2600
running don`t do this!

[CPUShack]

Correct, they were not meant to be removed and then replaced without some work

[Xaar]

Ok, thank you for your help

By the way: Does anyone know, how many pads there are on the bottom of this cpu?

Best regards, Xaar.

[max3]

It should look similar to this, as of this one came out of hp system of same type.





All you can do is try to take plastic surrounding frame off and chip is not soldered on to the board. there is also a padded conductive layer between chip and pcb surface, which has to be correctly alligned in order to have proper pins contacting with proper pads.

p.s. feel free to count

[Xaar]

Thank you, max3

The "pin count" (or in this special case the "land count") is what I wanted to get out

But it's really simple for this cpu: I only have to multiply 33 by 33 and then subtract 1. So this cpu has 1088 lands

Best regards, Xaar.