Hallo Peter,
Yes, I have the wanted service manual of the Persci 299 drive somewhere in
a carton box.
Let me know if you still needed!
I used to repair these drives, and have some spareparts left like heads,
bulbs for the sector indicator (plastic black box) and some very hard to
find driverchips for the voice-coil wich I found in Bangkok.
Best regards,
Kees
Th Netherlands