Reseating chips

From: Dwight K. Elvey <dwightk.elvey_at_amd.com>
Date: Thu Aug 22 12:22:00 2002

>From: "Bob Lafleur" <bob_lafleur_at_technologist.com>
>>
>How many of you remember the problem of chips coming unseated in older
>computers (like the PET) and having to push all the chips down as the
>equipment ages?
>
>I've now got this problem with my Kurzweil MIDIBOARD (a 6502-based MIDI
>keyboard controller). A few months ago I had to open it and reseat all
>the chips. Now I have to do it again.
>
>Does anyone know any tricks to keep this problem from occuring? I fear
>I'm going to have to do this a lot now, especially with the vibrations
>of playing the keys.
>
>Thanks for any tips.
>
> - Bob
>
>

Hi Bob
 Two things. First, straighten the pins so they don't
bow outwards. This is the most important step. For some
reason that I've never figured out, the tension on the
pins causes then to want to be out of the sockets, even
though, you'd think it would tend to hold them in.
 The second thing will help for good contact and that
is to use a silicon grease, like Dow Corning #4, on the
pin leads. I've been told the Permatex dielectric grease
is the same thing and I've used a product call Silglyde.
Although, it is called a grease, it has poor lubrication
properties but it will cause parts the come out with
spring tension to come out easier, I've not seen problems
with the leads straightened and the part weight being the
only factor.
Dwight
Received on Thu Aug 22 2002 - 12:22:00 BST