09.025 My 5.25" drive ruins every disk I insert. How can I fix it?
Description
This article is from the Apple II Csa2 FAQ, by Jeff Hurlburt with numerous contributions by others.
09.025 My 5.25" drive ruins every disk I insert. How can I fix it?
Probably, the drive's Write signal is ON when it shouldn't be. This
happens with some 5.25" drives when a 74LS125 IC on the drive's circuit board
is blown. (I accidentally offset a row of pins on the //e disk controller card
when plugging in a drive and blew the IC.) I removed the drive cover and
replaced the 74LS125-- it was socketed-- voila! it worked again. (For possible
disk-trashing fix for DuoDisk drives, see Q&A 006.)
Continue to:
My Books
