On Wed, Mar 15, 2023 at 11:48 AM Jon Elson via cctalk <[email protected]> wrote:
> On 3/14/23 22:55, Bill Degnan via cctalk wrote: > > I am working on an unknown status Persci 299 drive and one of the two > > drives is locked closed. Is this a "park" of some kind or is the drive > > broken? If it's a parked drive (only the drive 0 side) how do you unpark > > the drive? I can't seem to find any info on this. If I find anything I > > will post my findings. > > This is a dual 8" floppy drive with linear voice coil head > positioning? I used to have one of those. > > There are two 12V (I think) gear motors that operate the hub > clamp arm. The logic is very simple, press the button on > the front, the motor should unclamp the hub, press a disk in > the slot, the motor will clamp the hub. Check the switch in > the floppy slot to see if it thinks the floppy is in. But, > it seems anyway that the button has to take precedence over > the floppy in sensor. One possibility is that the motor has > failed, you can unplug the motor and apply 12 V to it and > see if it moves. Otherwise, the full-bridge driver has gone > bad. Or, mayvbe just a bad connection where the motor plugs > into the board. > > Jon > > I spent time with the drive, I could not find a clamp or screw that was holding the drive closed, I had never seen that found in a Persci drive before, but I guess that's the problem, bad motor holding it closed. Kinda weird but I can work from there. BIll
