Hello,

I bought some weeks ago a Kryoflux and was using it without problem to retrieve 5,25 880KB Amiga format disks.
I used a Mitsumi M90BCL-3 but after +/- 800 disks the Side 1 head refuse to rip data and it appears as "Format Unknown".
I opened the floppy to identify which head it was and it is the fixed one (the bottom one). Try to clean it up, ... but nothing worked.

Now I open an external 5,25 floppy box for Amiga 500 but it was a modified one with some custom soldering. The model is a Chinon FZ-506 Rev A.
I found the technical sheet and set the jumpers as it was on the doc, I remove all the home-made soldering and now I have a drive with 40 tracks instead of 80 when I use Kryoflux. The track 0.0 and 0.1 is green, then the others are greys (graphic interface) and when I scan it -> 40 tracks only.

There are 13 jumpers and here is the configuration I put: o = Open, - = Close

1 : -
2 : o
3 : -
4 : o
5 : o
6 : -
7 : o
8 : o
9 : o
10 : -
11 : o
12 : o
13 : -

Before there was an interrupter on the external box saying 40 or 80 tracks. it connected a wire between ground and the circuit somewhere. I took pictures of the drive with all the home made wire (Amiga modifications).

Is there a way to restore it as an original IBM PC Drive, maybe some bad jumper settings or a soldering to do ? Is there someone who can post picture of the controller card of the drive and jumpers settings ?

Here are links to drive with hardware modification from the Amiga external box:
http://DjErase.no-ip.info/ATROUVER/525drive/IMG_1035.JPG
http://DjErase.no-ip.info/ATROUVER/525drive/IMG_1036.JPG


Original Jumpers settings (for Amiga)
http://DjErase.no-ip.info/ATROUVER/525drive/IMG_1038.JPG


Chinon PDF
http://DjErase.no-ip.info/ATROUVER/525drive/Chinon_FZ506.pdf

Thanks a lot

Correct, except that the reader software may need to readjust between 300 and 360 rpm.

Correct, except that the reader software may need to readjust between 300 and 360 rpm.

Of course it would have to be be able to do the math.