Have an International 630-0108 Analog board that someone wants to convert to 120v

Nov 27, 2022
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Hey there,
So recently someone asked me to racap a couple macs for him. No problem there but he also asked me to figure out why his one Mac Plus wouldn't turn on properly.
As soon as he brought it over it was easy to see the issue, on the back of the unit in clear text was written 220-240V well seeing as how we're in Canada this is clearly no good. I pulled out the analog board and confirmed it's the International 630-0108 model I also noted that the text at the bottom stating that W12 must be in place for 120V operation.

So my question is what do I need to do to convert this unit to 120V? Is it just adding a jumper wire at this point (hence the W in W12) or is it a Resistor? a capacitor? I'm searching for guides online but haven't come across anything yet that helps. So if anyone can refer me to something I would really appreciate it. Wire seems to make sense but I want to make sure I'm not unaware of something important.

Thanks!
 
Last edited:
Nov 27, 2022
95
45
18
Just in case anyone else has the same question I did; yes all you need to do is add a wire jumper to W12 and the analog board will run at 120V instead of 240V. I finally just added the wire and tested the voltage. Mac boots up fine now.
 
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