This comprehensive service manual provides in-depth technical information about the Brother facsimile equipment, specifically covering the FAX 4100, FAX 4750e, FAX 5750e, MFC 8500, and MFC 9660 models. The manual delves into the intricate details of these machines, offering a thorough understanding of their specifications, construction, operating principles, and maintenance procedures. It serves as an invaluable resource for technicians and professionals who need to troubleshoot, repair, or perform routine maintenance on these Brother fax machines. This manual is an essential tool for anyone involved in the servicing and repair of Brother FAX 4100, FAX 4750e, FAX 5750e, MFC 8500, and MFC 9660 models.