Article View: comp.sys.mac
Article #31445Re: Mac II power up problem.
From: J. Chris Cooley
Date: Mon, 22 Aug 1988 14:13
Date: Mon, 22 Aug 1988 14:13
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In article <76000276@p.cs.uiuc.edu>, gillies@p.cs.uiuc.edu writes:
>
> I believe the Mac II has circuitry to keep you from powering it
> up/down quickly. So if your machine ran for a few hours, you
> may have to wait a few moments until it cools off, before you can
> power it back up.
>
Actually, it has nothing to do with heat, but with letting all the
silicon components "discharge" (for lack of a better word). Apparently,
there can be damage if an IC which has some arbitrary voltage across
it (from the power-down) gets its regular voltage from the power-up
applied to it.
This is nothing new. I was told of this back when my Radio Shack
Model 1 was a big contender in the computer ring. I've personally
seen that computers sometimes don't power up if not let to sit a few
seconds after power-down.
> Don Gillies, Dept. of Computer Science, University of Illinois
> 1304 W. Springfield, Urbana, Ill 61801
> ARPA: gillies@cs.uiuc.edu UUCP: {uunet,ihnp4,harvard}!uiucdcs!gillies
--chris
Disclaimer: I'm not pretending to be anyone significantly skilled in
electronics.
--
J. Chris Cooley | husc6! -\
Computation. Center (COM 1) | im4u! -->-cs.utexas.edu!ut-emx!jcc
Univ. of Texas at Austin | uunet! -/
Austin, TX 78712 |
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!water!watmath!clyde!att!rutgers!mailrus!tut.cis.ohio-state.edu!cs.utexas.edu!ut-emx!jcc From: jcc@ut-emx.UUCP (J. Chris Cooley) Newsgroups: comp.sys.mac Subject: Re: Mac II power up problem. Message-ID: <5282@ut-emx.UUCP> Date: 22 Aug 88 14:13:28 GMT References: <6839@well.UUCP> <76000276@p.cs.uiuc.edu> Organization: The University of Texas at Austin, Austin, Texas Lines: 33