Vintage Synth Repair

> Greetings,
>
> When I power up my SQ-80, I get a low battery warning. Before I take
> care of that, I want to save what's in memory to floppy. Not having any
> manual (the SQ-80 was a gift with no docs), it was still easy to access
> the floppy drive. But I get an error message no matter what function I
> select:
> No disk in drive
> press any button to continue
> The light on the drive lights up but no whirring sound of a spinning
> disk is heard.
>
> So I went on-line and found user and service manuals. I learned that
> although the disk is supposed to be DSDD, HD will work, too. There was
> nothing about how to diagnose the disk drive. I see nothing regarding
> replacing the battery, either. If someone can point me to a resource
> that has the info I need, I'd appreciate it.
>
> In terms of playing and programming sounds, the keyboard is working fine.
>
> Cheers,
>
> Bill

You should do a SysEx dump to save the sounds.  Replacing the battery 
should be fairly straightforward.  You can apparently use a normal PC
drive with a bit of modification, assuming the drive controller chip
isn't bad.  Consider whether you really want to be messing with DSDD
floppies in 2010.  It would be convenient if you want to use the 
sequencer (how atavistic!), but otherwise MIDI dumps and maybe an 
E2PROM cartridge should be plenty sufficient.