Article View: comp.sys.amiga.tech
Article #12363Grounding problem??
From: Yen Yuanchi Hsieh
Date: Tue, 25 Apr 1989 20:44
Date: Tue, 25 Apr 1989 20:44
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1433 bytes
Hi all you netters -- got a question for y'all, My machine has been acting VERY flakey recently, this include symptoms like; external disk spins, but cannot validate disk; printer is missing certain bits when transmitting (are = ara); external memory does not work, or worse -- machine refuses to boot (green, purple, yellow, red, black + static screens -- sometimes some random noise, drive clicking -- very interesting really). I noticed that the ground shield on the A500's supply was ~2 Volts at a real high frequency waveform. Is this normal -- is this normal ground signal from the outlet -- all of the other outputs were nice and steady. Could this be causing the problems? (I've switched my 8520's -- exact same problem with printer) Help, please. I'm getting tired of calling people, and sending it down to get serviced, etc. -Dave
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arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!agate!web-2c.berkeley.edu!c60c-1eaReferences:
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!agate!web-2c.berkeley.edu!c60c-1ea From: c60c-1ea@web-2c.berkeley.edu (Yen Yuanchi Hsieh) Newsgroups: comp.sys.amiga.tech Subject: Grounding problem?? Summary: Machine flakey -- shield ground has voltage waveform Keywords: Shield Ground, flakey 500, HELP Message-ID: <23582@agate.BERKELEY.EDU> Date: 25 Apr 89 20:44:33 GMT References: <358@nadia.UUCP> <21526@santra.UUCP> Sender: usenet@agate.BERKELEY.EDU Organization: University of California, Berkeley Lines: 20