Manual for the Overland Data OD3201 Tape Drive?

Anyone has the operation and service manual for the 9-track mag tape drive Overland Data OD3201? Similar to a Qualstar, but seems larger-faster-quieter-better. Just succeeded putting it online. This one is unusual in its simplicity - it has both a Pertec and a Parallel Port interface. Once I found the DOS software in a dark corner of the Internet, I connected it to the parallel port of a my vintage DOS machine and it worked straight out of the box. Look Ma, no interface cards needed! Reads and writes fine apparently. But it has the common ailment of servo motor tape drives, it creeps a little bit at rest. So I probably need to adjust a pot somewhere. Would be nice if I could find the service manual, but no luck on Googling it up. Marc