Developing stage ..............................................................................................................86
Transfer stage ...................................................................................................................87
Fusing stage .....................................................................................................................89
Print cartridge ...................................................................................................................93
Imaging-drum E-label .......................................................................................................94
5 Removal and replacement
Chapter contents ....................................................................................................................97
Introduction ..............................................................................................................................99
Removal and replacement strategy ..................................................................................99
Electrostatic discharge .....................................................................................................99
User-replaceable parts .....................................................................................................99
Required tools ...................................................................................................................99
Before performing service .....................................................................................................101
Pre-service procedures ..................................................................................................101
Parts removal order ........................................................................................................102
Removal and replacement ....................................................................................................103
Imaging drum ..................................................................................................................103
Print cartridges ................................................................................................................103
Fuser cover (and fuser) ..................................................................................................104
Right- and left-side covers ..............................................................................................106
Control panel ..................................................................................................................107
On-off switch ...................................................................................................................109
Interface cover ................................................................................................................110
Formatter assemblies .....................................................................................................111
Fuser motor ....................................................................................................................116
Dc controller ....................................................................................................................117
Optional tray 2 (250-sheet tray) ......................................................................................118
Carousel-engagement motor ..........................................................................................120
Front lower cover ............................................................................................................121
Back cover ......................................................................................................................122
Top cover ........................................................................................................................123
Top door .........................................................................................................................125
Air duct and fan ...............................................................................................................127
Laser/scanner assembly .................................................................................................128
Front cover ......................................................................................................................130
Density sensor and top-of-page sensor .........................................................................130
E-label reader (for imaging-drum E-labels) ....................................................................132
Tray 1 (multipurpose tray) ..............................................................................................133
Tray 1 separation pad assembly ....................................................................................135
Gear assembly ................................................................................................................136
Waste-toner sensor ........................................................................................................138
Rotary-drive assembly ....................................................................................................139
Top plate .........................................................................................................................142
Print-cartridge carousel ..................................................................................................145
Aligning the carousel gears ............................................................................................149
Registration-roller assembly ...........................................................................................150
Toner-catch tray ..............................................................................................................151
Transfer-roller plate ........................................................................................................152
Transfer roller .................................................................................................................152
Feed-drive shaft ..............................................................................................................153
ECU pan .........................................................................................................................154
Sub-high-voltage transformer PCA ................................................................................157
High-voltage transformer PCA .......................................................................................158
Low-voltage PCA ............................................................................................................159
ENWW v
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