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| Power supply for LC2 |
Posted by: chris on 2007-08-18 20:26:02
Is it possible to make a AT or ATX PSU work with a LC2? Mine is dead and I suspect the PSU, but I don't want to spend a lot of money on getting a replacement and find out it doesn't work.
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Posted by: LCGuy on 2007-08-18 22:15:26
http://www.computercraft.com/docs/mchk.shtml
Are you sure its the PSU? Tried a new PRAM batt?
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Posted by: Cory5412 on 2007-08-18 23:46:13
an LC II would not need to have the PizzaBox PowerToggle™ performed upon it, although it might be a good idea to try it.
The PizzaBox PowerToggle, as it is sometimes known, is the maneuver by which you turn the pizzabox mac on, then you very quickly turn it off and on again. It's mostly for LC475 and Q605 computers though, since those typically won't boot fully (with video, that is) unless they have a working PRAM battery.
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Posted by: ~tl on 2007-08-19 01:55:28
The LCII's power supply is relatively simple (no soft-power etc), so it shouldn't be hard to test it out. Take the PSU out of the machine, plug it in, switch it on and test the output pins with a multimeter. IIRC the voltage for each pin is written on the motherboard beside the connector (at least it was with my LCIII). That will let you know if it's working...
As for using a PC power supply with it... I can't see why it wouldn't work as long as the PSU has pins for +5,V +12V and -5V. However, you'd need to rig the soft-power so that the PSU turned on and off with the switch on the back (if it has one).
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Posted by: chris on 2007-08-19 05:02:21
Yeah, I tried a PRAM battery change, it doesn't do anything. Thanks all for responding, that's useful.
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Posted by: LCGuy on 2007-08-19 05:33:31
an LC II would not need to have the PizzaBox PowerToggle™ performed upon it, although it might be a good idea to try it.
The PizzaBox PowerToggle, as it is sometimes known, is the maneuver by which you turn the pizzabox mac on, then you very quickly turn it off and on again. It's mostly for LC475 and Q605 computers though, since those typically won't boot fully (with video, that is) unless they have a working PRAM battery. Actually, some LCIIs need it. Back in 1997, in our grade 7 classroom we had an LCII suddenly die on us. Basically, the PRAM battery went flat, but none of us knew that. So it sat for several days. Then one day one of my friends did a pizzabox powertoggle on it, and it came to life, just with its PRAM reset...that was the first time i'd ever heard of or seen the powertoggle in action. 🙂
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Posted by: Patrickool93 on 2007-08-19 09:41:17
My LC needs it done, and even my Performa 6116 needs it too. And of course my LC 475.
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Posted by: Charlieman on 2007-08-19 11:55:47
Is it possible to make a AT or ATX PSU work with a LC2? Mine is dead and I suspect the PSU, but I don't want to spend a lot of money on getting a replacement and find out it doesn't work. Rewiring an AT PSU will be easy. An ATX PSU will be more challenging because you will need to short two of the signals to switch it on. An original repacement is much easier to use, and if the seller owns an LC series pizza box, testing only takes ten minutes.
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Posted by: Mike Richardson on 2007-08-25 10:16:49
I have a spare LC power supply available. PM me if you are interested.
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Posted by: aftermac on 2007-08-25 10:31:06
I found this place online that has LC power supplies for $14.95 http://www.nexcomp.com/power.html. I have not purchased anything from them, so I'm not sure if they are reputable vendor or not.
I have an LC and a IIsi that both have dead power supplies. I need to use the power supply from my LC II to verify that the LC's is actually dead before I make a purchase (hopefully, in the next couple days). Unfortunately, I don't have a spare IIsi to do the same.
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Posted by: chris on 2007-08-26 14:09:45
Got it working without a PSU replacement. Turns out there was serious corrosion on the connectors, but some poking with wire solved it(don't do this. Very stupid.)
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Posted by: Maccess on 2007-09-11 23:02:41
the LC power supply is so simple. You can even use a hard drive power supply if you've wired it properly. There's no need to use an AT/ATX power supply. All the board needs is a regulated 5V rail, a 12V rail, and ground. There's no trickle current and soft power on those pizza boxes.
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