Brother International HL-3400CN Service Manual - Page 54

HL-3400CN SERVICE MANUAL CHAPTER 4 STRUCTURE OF SYSTEM COMPONENTS 1. BASIC STRUCTURE 1.1 Mechanical Structures This laser beam color printer (hereinafter called "Printer) consists of five mechanical systems; Print, Transfer, Scanning, Paper Transport and Control System. The printer produces color printing through the interactive operations of these five systems as shown in Fig.4-1. (1) Print System The print system consists of the following 6 (six) functional parts located around the OPC belt which forma toner image on the OPC Belt. • Charger Part • Exposure Part • Development Part • First Transfer Part • Discharger Part • Cleaner Part (2) Scanning System The scanning system consists of the following 2 (two) functional parts which form an electrostatic latent image on the OPC Belt by scanning it with a laser beam. • Laser Unit • Scanner Motor (SCM) (3) Transfer System The transfer system consists of the following 3 (three) functional parts and transfers the toner image formed on the transfer drum onto the page. • Transfer Drum • Second Transfer Part • Drum Cleaner Unit (4) Paper Transport System The paper transport system consists of the following 5 (five) functional parts and picks up paper from the media cassette, separates the paper from the transfer drum and exits it from the printer body after fusing the toner image on the paper. • Media Cassette • Transport rollers • Paper Discharger • Fusing unit • Paper Exit 4-3