Modern Power Supply for Macintosh II/x/fx

[chrisrueckert]

What solutions are out there for the Macintosh II/x/fx series? I saw this https://www.instructables.com/Macintosh-IIfx-Modern-Power-Supply-Replacement/ but am wondering if there is a less complicated approach or solution.

 

[Unknown_K]

Nothing modern fits without some "work".

 

[chrisrueckert]

Nothing wrong about work... Just getting a more simplified solution would help tremendously. Like the ones that came up for the IIsi and LCs recently.

 

[Bolle]

I just removed the internals of a dead IIfx power supply and got a random server psu from ebay to put inside the original shell.
I drilled out the original standoffs and drilled new holes to add standoffs to match the hole pattern on the replacement.

I didn’t bother putting a solution for the passthrough power connector back in place. In the guide you posted the passthrough will always be powered once the Mac is plugged in. The original power supply will switch the passthrough off when the Mac is powered down.



That’s as easy as it gets without having to do 3D printed mounts and panels and all that stuff.

 

[Unknown_K]

May I ask why you didn't try to fix the original supply (since you seem to be very technically inclined)?

I kept some old dead custom PS supplies from OEM systems which I replaced because while just replacing them is cheaper now or at that time, down the road it might be worth fixing the old ones.

 

[jmacz]

Same as @Bolle except I did get the passthrough power working by reusing the relay from the stock PSU.

Don’t forget the power on stuff (the guide uses a transistor for this) if you want to be able to power up like stock (keyboard, etc).