More Commodore PET drives - more help?

Hi Guys, Still slogging away at our big pile of Commodore PET equipment. (Having a pretty good success rate so far - thank god for funet!) Todays's victims are: 1) Commodore SFD-1001 This is the IEEE-488 (PET) single-drive that looks very much like a VIC/C64 1541 serial drive. The drive powers on, and both the POWER and drive LED come on solid RED and stay that way - no other activity is observed - it doesn't matter if the IEEE bus is connected or not, and resetting the IEEE bus (via PET power-on) has no effect. If the PET tries to access the IEEE bus, it hangs, presumably waiting for an acknowlege that never comes (?) It looks like the on-board CPU is not running at all. I found some schematics on funet, however I have no experience with this particular drive at all - anyone have any tips or pointers? Any known common faults with these symptoms? 2) This is an MSD-SD2, a third party "clone" of the Commodore 2040/4040 drive (Yeah, I know it's not an exact clone as the internals are different, but it reads/writes 4040 disk format). This drive powers on and repeatedly flashed an error code consisting of seven (7) flashes of all three LED's (POWER, Drive1, Drive2). I can find no service information on this drive at all. Looking for: - Info on what the error code means. - Schematics - Any other service info/tips. Regards, Dave -- dave04a (at) Dave Dunfield dunfield (dot) Firmware development services & tools: www.dunfield.com com Vintage computing equipment collector. http://www.parse.com/~ddunfield/museum/index.html