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Thread ID: 29540	2003-01-23 21:47:00	werid psu problem, murphy is on the job ;-)	tweak'e (174)	Press F1

Post ID	Timestamp	Content	User
116219	2003-01-24 07:39:00	i don't think it has anything to do with the other rails as they are simply not used (after all the pc is off). the one rail (psu-on) that is giving problems is the only one they don't give a wattage rating for (or should that be milliwatts ;-) ).	tweak'e (174)
116220	2003-01-24 07:58:00	Hmmmm............ Thinking out loud about "unused rails," I wonder if it is a sensing problem other than over-current. Could it be an over-voltage sensor that is folding back the output? Again, I can't see how but an unloaded output could perhaps peak a bit too high. This needs a process of elimination tweak'e, do you have any suitable dummy loads around? Do you have any formal specs for the Enermax PSU? Cheers Billy 8-{) ?:|	Billy T (70)
116221	2003-01-24 08:08:00	Hi again tweak'e Found some enermax 300W psu specs. Three things come to mind on reading these: 1) Inrush current 2) Impedance of your power feed due to faulty power point/loose pin connections etc (could be causing voltage drop at switch on surge.) 3) The 3.3 volt overvoltage protection cutsin at just 400mV above nominal. Any bounce or surge on an unloaded output could shut it down. Specifications: Voltage rating: 90V~135V AC or 180V~265V AC (selected by slide switch). Iin=115/230Vac. 8A/5A. Frequency: 47Hz~63Hz. Inrush current: 40A max./115V; 80A max./230V (at cold start). O/P: 3.3V, 50mV, 4%, 0A / 28A; +5V, 50mV, 5%, 7.5A/30A; +12V, 120mV, 5%, 3.75A/15A ; -5V, 50mV, 10%, 0A/1A; -12V, 120mV, 10%, 0A/1A; +5Vsb, 50mV, 5%, 0A/2.2A. 3.3V & +5V, 170W. TOTAL O/P: 300W. Hold up time: 17ms min. at 230V AC full load. Over Power Protection: 105%~160% of max load. Over Voltage Protection: +5V: 5.6V~6.9V; +3.3V: 3.7V~4.5V. Efficiency: 70% min. at full load. Can you try the psu in another computer? Cheers Billy 8-{) ?:| ?:|	Billy T (70)
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