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| Thread ID: 28373 | 2002-12-17 20:56:00 | Power Supply Excitement | B.M. (505) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 107017 | 2002-12-19 20:44:00 | Ahhhhhhhh! Graham, Just when I thought I had my head around this, we need a pulse on the 5v Standby Line . What’s got me licked is where does this pulse come from if there’s no power until its arrival? Talk about confused . Someone must have spent a lifetime making a power supply so complicated! : |
B.M. (505) | ||
| 107018 | 2002-12-19 20:48:00 | Actually BM, Graham did tell you . >the 5VSB (standby) line is the only active supply until you pulse >the "power switch" line . The 5vSB line supplies the power for the pulse . . . . . Momentary connection of the power on line to this will power it up . |
godfather (25) | ||
| 107019 | 2002-12-20 02:29:00 | Ahem, I've had a look at my book by Scott Mueller (caught you GF :D), and noted a few things down for you . The 5VSB is on pin 9 (purple wire) . That should be on whenever the power is connected . PS_On, on pin 14, with a green wire, is grounded to turn on the main supply . If it is at "5V", the supply is "off", except for the 5VSB . This is done by the motherboard logic , on the basis of pulses (in up or down directions) provided by "wake-on" devices, and the "Power Switch" . . . all of which use the SB supply . You can turn on the supply by keeping pin 14 at ground . pins 15,16,17 (with black wires) are ground . 19 and 20, with red wires are 5V . |
Graham L (2) | ||
| 107020 | 2002-12-20 02:33:00 | Ok, so I was ONLY 180 degrees out? close? It is a few years since I repaired one, admittedly. Its just not worth it commercially. Its Xmas, so I beg forgiveness...I am only getting a lump of coal anyway :( |
godfather (25) | ||
| 107021 | 2002-12-20 08:10:00 | Isn’t it spooky how coincidences fall sometimes? Whilst we are dealing with the peculiarities of these ATX power supplies a mate calls in with two flat boat batteries. No problem, pull out the old 30amp Battery Charger, hook everything up and nothing! The rectifier bridge is shot. (Probably stuffed by the last person who borrowed it). So, off to DSE and an hour later and $10 poorer all is repaired and the batteries on charge. Talk about a contrast in designs. Wondering if there’ll be a third and what sort it will turn out to be. Anyway, thanks for the help with these beastly little ATX supplies. |
B.M. (505) | ||
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