Image-formation system.......................................................................................................................61 Image-formation process.....................................................................................................62 Latent-image formation stage..............................................................................................63 Step 1: pre-exposure...........................................................................................63 Step 2: primary charging.....................................................................................64 Step 3:
laser-beam exposure..............................................................................64 Developing stage.................................................................................................................64 Step 4: developing..............................................................................................64 Transfer stage......................................................................................................................64 Step 5: media feed..............................................................................................65 Step 6:
image transfer.........................................................................................65 Step 7: separation from the drum........................................................................65 Step 8: separation from the ETB.........................................................................66 Fusing stage........................................................................................................................66 Step 9:
fusing......................................................................................................66 Cleaning stage.....................................................................................................................66 Step 10:
drum cleaning.......................................................................................67 Print cartridge......................................................................................................................67 Print-cartridge activation......................................................................................................68 5 Removal and replacement Removal and replacement strategy......................................................................................................70 Introduction..........................................................................................................................70 Required tools .....................................................................................................................71 Types of screws...................................................................................................................72 Service approach.................................................................................................................73 Before performing service....................................................................................................73 After performing service.......................................................................................................73 Print cartridges.....................................................................................................................74 External doors, covers, and panels......................................................................................................75 Front cover...........................................................................................................................75 Upper cover (fuser door)......................................................................................................80 Rear lower cover..................................................................................................................83 Left cover.............................................................................................................................84 Right cover...........................................................................................................................87 Rear upper cover.................................................................................................................91 Internal assemblies..............................................................................................................................92 Formatter cage....................................................................................................................92 Electrostatic transfer belt (ETB)...........................................................................................94 Fuser....................................................................................................................................95 Duplex fan............................................................................................................................96 Print-cartridge drive motors.................................................................................................99 Duplex-reverse-drive assembly.........................................................................................100 Duplex-feed-drive assembly..............................................................................................103 Fuser drive assembly.........................................................................................................105 Developing separation-drive assembly..............................................................................108 Pickup-and-feed assembly................................................................................................111 Pickup-drive assembly.......................................................................................................116 Laser/scanner assembly....................................................................................................125 Main fan.............................................................................................................................129 ENWW v