The best way I've got of fixing a Dallas RTC/NVRAM was discovered by trial
and error.
Both batt contacts are on one side. Tap out each side and ignore the
batteries in the middle. One of the sides holds flatwire contacts that
run to the internal cells. They are tiny so be careful with that drill.
This process worked on the Dallas RTC/NVRAM chip I have in my Sparcstation
4/330. I have the 'real' part now but the fixed one is just as good if a
little messier in appearance.
When you have exposed the contacts, Cut them (if they haven't been
allready by the Dremel ;-0) and solder an external battery pack (3volt to
4.5volt). Works like a charm and since the new batts are likely 1.5volt
'AA' types, the clock will operate forever. Well, for an awefully long
time.
Whatever you do, don't go through the bother of trying to replace the
internal batts that way. It will take forever, and very likely you will
destroy the chip trying it.
--
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Jeffrey S. Worley
President
Complete Computer Services, Inc.
30 Greenwood Rd.
Asheville, NC 28803
828-277-5959
Visit our website at HTTP://www.Real-Techs.com
THETechnoid_at_home.com
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Received on Fri Mar 16 2001 - 07:42:00 GMT