Slicing open the top of a 48T02 Sun Sparc chip to replace b

From: jpero_at_sympatico.ca <(jpero_at_sympatico.ca)>
Date: Sat May 19 16:37:44 2001

> Date: Sat, 19 May 2001 18:27:03 -0700
> To: classiccmp_at_classiccmp.org
> From: Geoff Reed <geoffr_at_zipcon.net>
> Subject: Re: Slicing open the top of a 48T02 Sun Sparc chip to replace
> battery is that thing hollow or filled with epoxy?
> Reply-to: classiccmp_at_classiccmp.org

> I downloaded the datasheet for the 48t02's, i think i may have a handful of
> 32.768 xtals here so I'm looking ar chopping the tops off the bad chips I
> have and taking protoboard and refitting them with a new xtal and
> batteryholder package that can take a replacable lithium cell. :) I
> sacrificed one yesterday to the great dremel in the sky to see how the top
> was put together...

X-ray will work too and far better. I haven't. If anybody did, post
those scans online pretty please? Especially DS12887 series.

Your method on total desruction on both crystal and battery is far
easier than nibbling away carefully bit by bit without eating
important lead or two. :-) The stuff to fill with is
nasty and eats up cutting bits and blunt saws fast. I discovered
that when I punched a hole on corner of a delegged 486SX SMD (black
package style w/ bumpers on all 4 corners) with a titanium drill bit
making into keychain tag. I think it's made of special epoxy and
glass powder.

Grab $1 quartz watch, these uses this 32.768KHz crystals. Far
accurate than those on junky peecee motherboards.

Cheers,

Wizard

>
> At 02:48 PM 5/19/01 -0700, you wrote:
>
>
> >On Fri, 18 May 2001, Richard Erlacher wrote:
> >
 
Received on Sat May 19 2001 - 16:37:44 BST