IT LIVES
NewWorld Power Macs 9 posts « Forum Index
#1 Fri Mar 26, 2010 12:35 pm IT LIVES
A few months ago I got an iMac G5 w/ box and everything for $20 at a yardsale. It had a Dead PSU. I spent a few hours last night and until about 1:00 this afternoon trying to get it to work with a hacked atx. Finally i had sucess!!! it is now working fine w/ a fresh instal of leopard, and i will be updating the software for a little while. i have a feeling that i will see a major diffrence between this 2ghz iMac and my 1.25ghz emac and dual 1.25ghz MDD. Very Happy
#2 Fri Mar 26, 2010 12:40 pm
Oh! Smile Congrats with ATX conversion. Can you show pins conversion scheme and general electric requirements for pins like voltage and ampers?
To Be Continued...
#3 Fri Mar 26, 2010 1:45 pm
For the pins conversion scheme I used these:
http://www.subedartech.net/docs/pc/connector_atx_pinout.GIF
http://www.xlr8yourmac.com/images/imacg5_power_supply_pinout.gif

The only confusing thing about the iMac diagram is that the "blue" wire is really gray, and the real blue wire is -12VDC, and not used.

The +24VDC is not needed on the 17" iMac G5s, and I have not figured out what it is supposed to do.


I think the general electric requirements are listed in the above links.
#4 Fri Mar 26, 2010 2:09 pm
+24VDC Actually used for Apple Cinema Displays in Tower Macs. And for FireWire.
To Be Continued...
#5 Fri Mar 26, 2010 3:03 pm
#6 Fri Mar 26, 2010 5:15 pm
Hmmm... I wonder, for what this +24V if ADC doesn't present on iMacs...
To Be Continued...
#7 Sat Mar 27, 2010 4:50 pm
24v is for bus power for FireWire devices. FireWire may appear to work without 24v, but I'll bet that drives that don't have their own power supplies won't work.

Peace,
Drew
Power to the PowerPC!
#8 Sat Mar 27, 2010 8:14 pm
OK, that explains it, I was using an eMac in Target Disk Mode
#9 Sun Mar 28, 2010 10:01 am
This is a great resource! Congrats on the conversion process. Do you have any pictures available yet to show of the converted iMac G5?

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MacTrove

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