[Coco] FD-502

[Bill]

The one of them will act like it's formatting a disk. But when it gets its
FIRST scan and is supposed to go back and verify (seems like a quicker scan)
it just stays in place with the disk spinning.

The other one won't even do that much. It goes through about 1/2 of the
first scan, and just sits there with the disk spinning. I have access to 2
controllers, and the drives do the same thing, regardless of which
controller is used.

Unfortunately, with my poor eyesight and arthritis in my joints, I'm unable
to work on them like I used to. 

It would be easier for me to sell them "as-is" on eBay and get back a little
of what I spent, or just trade both full units to someone for 2 bare drives
that I could use.

> -----Original Message-----
> From: coco-bounces at maltedmedia.com [mailto:coco-
> bounces at maltedmedia.com] On Behalf Of Robert Gault
> Sent: Thursday, March 12, 2009 9:20 PM
> To: CoCoList for Color Computer Enthusiasts
> Subject: Re: [Coco] FD-502
> 
> What is the failure mode? Can they read disks from another drive? Can
> they format disks? Does the drive spin and if so is the strobe speed
> correct? Does the head move along the rails? Check for fuses.
> 
> There are several failure modes that can be fixed by cleaning,
> lubrication, adjusting drive speed, and adjusting the track0 stop.
> Other failure modes would need a scope and special calibration disk to
> repair.
>