512k with very unique fan

[pcamen]

I got this 521k a few years back from my local Craigslist.  It has a Mac Rescue board in it with an unknown amount of ram. 

The fan seems like major overkill; it is massive for the size of the unit - about 4 inches across on the side of the unit.  Here are the pics hosted on my website as the image posting here seems to be broken at the moment. 

https://vintageapple.org/pic/512-fan.mov









The addition of the plug in for the fan on the analog board seems pretty solid work.  The case mod is a little hinky aesthetically, but otherwise solid. 

It is giving me a sad Mac error 020020 - anyone know what that means?

 

[Mighty Jabba]

That is hilarious. Somebody wasn't messing around when it came to cooling. Sorry I can't really help with the error.

 

[jessenator]

That is one big middle finger to Steve Jobs is what that is Pretty hilarious, but strangely quiet. Must not run at full RPM

Address error at F6???

https://udcf.gla.ac.uk/~gwm1h/Error_Codes/Sad_Mac_Codes.html

I wish i knew how to read those

 

[MOS8_030]

That's fan they used because that's the fan they had.

 

[dochilli]

I think that 020020 means that you have a RAM error at location F10. You have to change the RAM chip. Old RAM chips somtimes fail.

 

[pcamen]

Yea, that makes sense.  I think sometimes the SIMM contacts just get a little oxidation on them.  I remember years ago when I would try to fire up my apple II plus when it was 15 or 20 years old, I would have to pull out and re-seat all the chips that were in sockets as they no longer made good contact.  Perhaps it is the same thing here.  I'll give it a shot.  If not, I have plenty of SIMMs to replace them with. 

 

[pcamen]

And ... sure enough, that was it.  SIMMs all tested good in my SIMMCHECK and just re-seating them allowed the system to boot.  It has a very bright and crisp screen and 2M ram with the MacRescue.