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blueberry Imac down converter question. mod help.

Hi guys I was looking for info on my G3 imac mod I am working on and I found this forum seems to still be alive and have some useful info but I cant seem to find the information I am looking for. I have this G3 Imac that I have been trying to replace the crt with an lcd. With the extra space I plan on putting the guts of a intel laptop (broken screen), and/or some sort of older video game system along with a kvm. we will see how much I can stuff in there. I already got rid of the crt some years back but I pitched the analog video board along with it. The power goes though this board and I am trying to figure out how to re wire it so I can still use the stock downconverter/power brick.  I found plenty of sites showing how to convert it to atx, but using the stock power supply would save space and probably be simpler. I found this french translated, website on the wayback machine that shows pinouts for all connectors:  

https://web.archive.org/web/20090303235521/http://www.hardmac.com:80/articles/39/page3

from testing around with a multimeter it does look like these pinouts are probably accurate.  

My question is this: The pinout states that the downconverter needs 24 volts ac, now is this really 24 volts, or 240 volts as wall voltage may very well be wherever this page originates?
 

46422845_10157019151477792_4739995147033378816_n.jpg

 
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240VAC from the wall would result in fireworks. 24VAC sounds about right, other Macs used this voltage for ADC Monitor Power. In any case, the page is highly likely right, although it might not be required in an ATX conversion.

 
Thank you. My plan is to test the downconverter board hooked up to a transfromer to get 24 volts ac and then measure the voltages coming out. If this ends up being wrong for some reason and ruining the downconverter board I can still put an atx power supply in there. If it is right then I can mount the transformer in the imac case and wire 24 volts ac to the proper pins on the audio connector. Im probably not going to do this for awhile though as I have other things I need to be focusing on

 
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