Old socket failure. Something to watch for.

Seek advice, give advice or tell others about your repair and restoration projects

Old socket failure. Something to watch for.

Postby tezza on Thu Oct 13, 2011 12:16 pm

Last night I diagnosed a System 80 that didn't work more times than it did. The problem? A faulty pin 4 hole in ROM socket 2.

This is the third machine of mine where a faulty socket has caused an issue. I've had similar problems with my Kaypro II and Commodore PET.

A common technique when faced with a newly acquired machine that doesn't go is to reseat all socketed chips. This is a good idea, but must be done really really carefully otherwise it can damage old sockets. Far from curing a problem it can actually be made worse. This probably happened on all three machines mentioned above, as they certainly went through a chip reseat.

Anyway, something to be aware of.
Tez (Terry Stewart) (Administrator)
Collection: http://www.classic-computers.org.nz/col ... /index.htm
Projects and Articles: http://www.classic-computers.org.nz/blog/index.htm
Twitter: @classiccomputNZ | YouTube: Terry Stewart
Trade Me: tezza5
tezza
Site Admin
 
Posts: 2292
Joined: Thu Jan 01, 1970 12:00 pm
Location: Palmerston North, New Zealand

Re: Old socket failure. Something to watch for.

Postby Gibsaw on Fri Oct 14, 2011 1:03 pm

tezza wrote:Far from curing a problem it can actually be made worse. This probably happened on all three machines mentioned above, as they certainly went through a chip reseat.

Anyway, something to be aware of.


Ah just what we need... more double edged swords in diagnostic technique.
"dsakey" on trademe. Apple II's are my thing.
Gibsaw
 
Posts: 709
Joined: Sun Dec 19, 2010 2:45 pm
Location: Auckland

Re: Old socket failure. Something to watch for.

Postby lizardb0y on Sun Oct 16, 2011 8:02 am

Gibsaw wrote:
tezza wrote:Far from curing a problem it can actually be made worse. This probably happened on all three machines mentioned above, as they certainly went through a chip reseat.

Anyway, something to be aware of.


Ah just what we need... more double edged swords in diagnostic technique.

Yeah. And it'll only get harder the older they get. I need to make my millions soon so I can retire young and restore them all!
lizardb0y / Andrew
Just another 8-bit hustler

blog: http://www.vintage8bit.com
twitter: @vintage8bit
google+: http://gplus.to/lizardb0y
trademe: andrew9 - over 500 positive trades.
lizardb0y
 
Posts: 549
Joined: Mon Oct 06, 2008 8:50 am
Location: Wellington


Return to Repair and Restoration

Who is online

Users browsing this forum: No registered users and 3 guests

cron