exxos's Atari, Amiga & retro forum

Well, I did this to see what the result was:


Basically a 12v fan blowing straight onto the MMU. And it sort of helped, it took at least 45 minutes for the failure to occur, about 3 times longer than before. Recovery was a lot faster too

I think this really cements the fact that the MMU is bad, which is a real shame.

I have some dead video cards that have some very neat little heatsinks with integrated fans, so I'll see If I can extend the time further.

Fit a PC water cooling block on it and have the only water cooled Apple II on the planet. ;-)

@rubber_jonnie

I have found spare parts board will update you later with a picture of the mmu ic my friend says its the iou ic thats different let's hope I know the board layout is different.do you have the enhanced setup ?


Tom

stephen_usher wrote: 18 Apr 2023 16:04 Fit a PC water cooling block on it and have the only water cooled Apple II on the planet. ;-)

Don't tempt me...

Other things under consideration:

1. A peltier cooling block
2. An M.2 cooling block with additional cooling fans, or water cooling
3. baking the MMU (See Adrians Digital Basement)

I'm not done yet!!

Tomswork wrote: 18 Apr 2023 20:23 @rubber_jonnie

I have found spare parts board will update you later with a picture of the mmu ic my friend says its the iou ic thats different let's hope I know the board layout is different.do you have the enhanced setup ?


Tom

Wow that's amazing!!

Mine is not an enhanced IIe, just the standard one.

Thank you sir.

@rubber_jonnie

Mmu and my spare board


Tom

@Tomswork thanks, I am in the office today so will look properly when I get home.

You're a star.

Tomswork wrote: 19 Apr 2023 05:19 @rubber_jonnie

Mmu and my spare board


20230418_211600.jpg

20230418_211639.jpg


Tom

Hey Tom, my MMU part number matches yours, however my IOU is different, as your friend suggested, with a part number of 344-0022 instead of the 344-0020 of yours.

Thanks

@rubber_jonnie
Let me know i can put the mmu in a picture mailer
Tom

Tomswork wrote: 20 Apr 2023 20:16 @rubber_jonnie
Let me know i can put the mmu in a picture mailer
Tom

That would be a lifesaver Tom, I'll PM you.