Article View: comp.sys.dec
Article #140711/750 power supply help
From: Dan Lanciani
Date: Fri, 21 Aug 1992 05:17
Date: Fri, 21 Aug 1992 05:17
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1220 bytes
I have an 11/750 power supply problem. Within minutes of power-on, the "reg fail" light comes on. The "+5 fail" and "+2.5 fail" lights are off, and, indeed, those voltages are present and correct. In fact, the only voltage that looks odd is the -15 feed. It starts out around -15.1 and drifts to -14.5 at which point the "reg fail" appears. Thereafter it continues to about -14.2 and stays there. Removing the +-15 load does not change the voltage, so the problem probably really is the regulator. Does anyone have a spare +-15 regulator module they'd like to part with? (I'm hoping the +-15 plug-in board is at fault, but maybe the whole +5/+-15 unit would be easier, if heavier.) Alternately, print sets could be useful... Thanks, Dan Lanciani ddl@harvard.*
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arc1-ca.pugleaf.net!sparky!uunet!zaphod.mps.ohio-state.edu!rpi!uwm.edu!ogicse!das-news.harvard.edu!husc-news.harvard.edu!burrhus!ddlShow Full Headers
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Path: arc1-ca.pugleaf.net!sparky!uunet!zaphod.mps.ohio-state.edu!rpi!uwm.edu!ogicse!das-news.harvard.edu!husc-news.harvard.edu!burrhus!ddl From: ddl@burrhus.harvard.edu (Dan Lanciani) Newsgroups: comp.sys.dec Subject: 11/750 power supply help Message-ID: <1992Aug21.051718.20788@burrhus.harvard.edu> Date: 21 Aug 92 05:17:18 GMT Article-I.D.: burrhus.1992Aug21.051718.20788 Organization: Harvard University, Cambridge, MA Lines: 16