[vcf-midatlantic] Mac 400k Floppy Drive cleaning/lubrication.

[Jonathan Gevaryahu]

On 12/17/2015 3:11 PM, David Ryskalczyk via vcf-midatlantic wrote:
> Tony Diaz (from A2Central) put together a really in-depth guide for the 800k/1.4M at http://apple2.org/35Drv/index.html. I haven't done this myself yet, as most of my drives work, and it's for 800K, but I believe the 400K drive is not all that different rebuild-wise.
>
> Do note, though, that connecting a 400K drive to newer Macs could fry it.
>
> David
>
>
Yes; Tony let me know that for the common "mac 512k to 
plus-with-512k-of-ram" upgrade, you had to swap the cable between the 
mac 512k mainboard and the floppy drive; the 400k original floppy drive 
uses a cable with a red stripe on the wire for pin 1. The 
800k-in-mac-512k cable has a yellow stripe on the wire for pin 1 and one 
of the wires is cut compared to the red cable, since otherwise the red 
cable wiring with the 800k drive causes a dead short and will burn out 
the cable, drive, or motherboard or possibly all three.

-- 
Jonathan Gevaryahu
jgevaryahu at gmail.com
jgevaryahu at hotmail.com