Re: Disk drive problems.

[Cyrus Roton <croton@ridgecrest.ca.us>]

On 6 Dec 1995, Rob Thomson wrote:

> Hi,
> I have a number of Disk II compatible drives( a couple of full height and about
> 8 half height), most of these have problems. Some, when I plug it into the drive
> controller as drive 2, drive 1 which had previosly been working fine, starts 
> corrupting disks. Also, apart from cleaning the heads and checking the drive
> speed, are there any other general fixing things I should be doing?
> Thanks,
> 
I ran into the same problem. Had to replace a chip or two in the bad drive. 
Don't remimber which chip(s). I think it was a 74LS----(three digit) 
type. If you have several disks, you can swap chips (one at a time) to 
find the bad one(s). That is how I did it. Be sure to use a working disk 
which you dont mind getting corrupted when testing.

Cyrus Roton   croton@ridgecrest.ca.us
Ridgecrest Apple User Group