Boss, Drums, models:

DR-220A/E	Service Notes
DR-3 Dr. Rhythm	Turbostart
DR-55	User Manual
DR-550 Dr.Rhytm	Service Notes
DR-660	User Manual
DRP	Instructions Manual
Dr. Rhythm DR-220A	Owner'S Manual
Dr. Rhythm DR-3	Service Notes
Dr. Rhythm DR-550MKII	Owner'S Manual
Dr. Rhythm DR-670	Owner'S Manual
Dr. Rhythm DR-770	Owner'S Manual
Dr. Rhythm DR-880	Owner'S Manual Brochure & Specs
Dr. Rhytm DR-110	Owner'S Manual
Dr. Rhytm DR-550 MK II	Service Notes
Dr.Rhytm DR-110	Owner'S Manual