Path: utzoo!censor!geac!torsqnt!news-server.csri.toronto.edu!cs.utexas.edu!know!sdd.hp.com!think.com!mintaka!nuhub!nic!chaos.cs.brandeis.edu!dan From: dan@chaos.cs.brandeis.edu (Dan Schwarz) Newsgroups: comp.sys.mac.hardware Subject: Re: Help: IIcx powers itself down Message-ID: <1990Dec17.180456.23785@chaos.cs.brandeis.edu> Date: 17 Dec 90 18:04:56 GMT References: <1192@dg.dg.com> <1990Dec8.010224.14756@cunixf.cc.columbia.edu> <110870@convex.convex.com> <111548@convex.convex.com> Organization: Brandeis University Lines: 62 In article <111548@convex.convex.com> woods@convex.com (Darrin Woods) writes: >> BTW - for those of you who didn't catch it.. The socket on the back is >> not a pass through - it draws its current from the mac itself just like >> the hard drive and floppy and moboard >> >>Huh? Passing wall otlet power though the CX power supply. No way! There >>might be a relay that the CX switches on when the machine is powered up >>and so feeds power to the monitor, but that power surely don't pass trouhg >>the CX power supply in any way. Check you facts. >> >> Tero Nieminen Tampere University of Technology > >(Opening Apple Technical Manuals - flipping pages) >OK, I checked - unless one of my friends from Apple corporate would like >to correct me, I state again. The power going out from the back of all >Mac II's is directly controlled by the Power Supply - IT IS NOT A PASS >THROUGH. The wattage that is stated on the back of the PS as being the >max includes any power going out through the power connector to the >monitor, HD or whatever. I guess you can always try it - Plug a hair >dryer into the back of a cx and see what happens. > >Blacksheep >Senior Systems Engineer >Darrin R. Woods woods@convex.com Unless the manual specifically states that the wattage on the back of the PS includes any power going out through the monitor connector, I seriously doubt that the monitor connector draws its power from the Apple power supply. Why? couple of reasons: 1) The power supply on machines such as the Mac IIsi is grossly inadequate anyway; it's a mere 47 watts whereas the Mac IIcx power supply is rated at over 100 watts (I think; I'm a IIsi owner so I don't know about the other machines.) Would Apple expect a user to plug a monitor into a 47 watt power supply which is also handling the power demands of the CPU, hard drive, etc? I think my monitor's power requirement is well over 47 watts! 2) The term "passthrough" may be used by Apple to denote a non-switched outlet, and when they say that the connector is non-passthrough, they mean that a relay in the power supply CONTROLS the socket. They don't mean that it SUPPLIES the socket. 3) Correct me if I'm wrong, but the Apple power supply is designed to supply DC current at varying voltages to power the CPU and related devices. The monitor socket on the back of the Mac is 120VAC. So what would the power supply be supplying to the monitor socket? _Dan -- | Same as it ever was | Dan Schwarz, MB 2926 Brandeis U. | RECYCLE YOUR JUNK| | Same as it ever was | I'NET dan@chaos.cs.brandeis.edu |------------------| | Same as it ever was |----------------------------------| tradetapes?mailme| | Same as it ever was..| NO BLOOD FOR OIL: NO GULF WAR | floydrushdead,etc|