Help on HP 82901 drive

Very interestings... I shall keep on investigating the board on my own, though. I find those single-page HP schematics, particularly of something as complex as this, to be very hard to follow... I notice the drive schematic isn't included. No problem, they seem to be standard Tandon TM100-2 drives (IBM PC 360K drives :-)) with the PCB gold-plarted nnd with an HP part number. Electronically they seem identical. Does anyone have a pointer ot the TM100 service manual? I am not looking for schemaitcs, those I have many times over. I am looking for the alignment instrucitons, exploded diagrams, etc. Drive 1 in my 82901 needs a little repair, and I want to see what hte offiical procedure is before I ignore it :-) Does your 82901 have the 36 pin microribbon socket on the back for extra drives? Mine doesn't. -tony