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echo: apple
to: comp.sys.apple2
from: James Littlejohn
date: 2009-02-14 21:17:06
subject: Re: Flakey ZipChip 8000

On Feb 14, 8:53=A0pm, Steven Hirsch  wrote:
> I have an 8Mhz. ZipChip that's been out of service for a while due to gen=
eral
> silliness and I decided to give it another shot today. =A0This is one of =
the
> units with cheap, thin tin-plate pins that bend if you look at them too h=
ard.
> =A0 After a heart-stopping experience bending two of them on the way into=
 the
> motherboard, I decided to put it more or less permanently into a socket o=
f its
> own for protection.
>
> About 15 minutes of aggravation, I realized that no amount of care in the
> world was going to get all 40 leads into a machine-pin socket :-(. =A0I f=
inally
> was able to seat it into a conventional tin-contact socket and plug that =
into
> the motherboard.
>
> The problem is that this thing won't start unless I press lightly with my
> thumb on the front right corner. =A0At that point, it comes up and runs m=
ore or
> less reliably (although it does not reset from OA-Ctrl-Reset, I have to p=
ower
> cycle with my thumb on the chip).
>
> This thing may not even have one more round of insertion left before pins
> start breaking off, so I'm looking for advice on solving the intermittant
> problem and mounting it permanently in... something. =A0What have folks d=
one
> with these things to get around contact problems? =A0Is there life after =
broken
> pins?
>
> I can almost imagine a circuit board with a pair of 20-pin headers and 40
> holes offset a bit so I can solder the ZipChip on permanently.

I had foreseen this on my Zip chips and on Accelerators for the GS. I
desoldered the CPU socket and installed a ZIF socket on both my IIe
and IIgs motherboards.
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