Path: utzoo!utgpu!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!ames!amdahl!greg
From: greg@amdahl.uts.amdahl.com (Greg Bullough)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Exploding clock cards
Message-ID: 
Date: 7 Dec 88 16:43:22 GMT
References: <16800395@clio>
Reply-To: greg@amdahl.uts.amdahl.com (Greg Bullough)
Organization: Amdahl Corporation, Sunnyvale CA
Lines: 16

In article <16800395@clio> berger@clio.las.uiuc.edu writes:
>
>There should have been a diode preventing the voltage from being
>applied to the battery.  Was the diode shorted, or missing alto-
>gether?
>
Well, there's more to the story, now. The card was replaced by a
very concerned dealer. I plugged in the new card, pulled the battery,
put a VOM across the clip, and turned on the computer. VOILA!
+5 VOLTS! Great design, huh? I cannot find a blocking diode, so I
assume it was left out of the design.

Can anybody correct me if I'm wrong. It IS a no-no to put a positive
over-voltage across a lithium battery, isn't it??

Greg