Mac 128k 220V to 110V conversion

[mac512]

Hi folks,

I finally found a 128K here in Toronto. But the A/B is dead. As I have a spare board (known to be in very good condition) that I took with me from Chile, I was wandering if I can convert it to 110V. The board is very different from the 110V board as it is the International version. From what I understand, it can be converted to 110V by closing a circuit and replacing the fuse. I'm not sure, and that's why I'm asking for your help.

This is why I think it can be converted:

This is the fuse warning:

This is the circuit to close (W12):

Hope someone knows...

Thanks.

 

[uniserver]

looks like solder a wire there at w12, and you are AT 120v

 

[360alaska]

Wire on w12 and a 2.5a 250 volt fuse...

 

[mac512]

That's what I thought, but i don't know...

I have 3 boards so I will try with one and hope not to get sparks and other pyrotechnical stuff...

Will let you know how it goes.

 

[uniserver]

i wouldn't even change the fuse... 

there is no way that machine is going to pull 192 watts @ 120vac -- maybe for .5 seconds when you first flip it on.  Other wise pretty sure they only use about 80 watts on/idle.

View attachment 5569

 

[uniserver]

I'm going to hook my 128k and Plus up to my amp meter and see what these things draw, now i'm curious.

 

[360alaska]

i wouldn't even change the fuse... 

there is no way that machine is going to pull 192 watts @ 120vac -- maybe for .5 seconds when you first flip it on.  Other wise pretty sure they only use about 80 watts on/idle.

Screen Shot 2015-02-25 at 5.55.16 PM.png

I got those instructions out of a manual... If not changing the fuse works then go with it...

 

[uniserver]

no problem buddy, your good!

 

[mac512]

So Uni, were you able to check the amps?

 

[uniserver]

No, and i'm not going to... way to busy sorry.  I'm sure its fine.. worst case the fuse pops... no big deal at all... Get in there and do it already!   No place for a nervous person.