Replacing the print cartridges.............................................................................................119 Replacing the imaging drum...............................................................................................121 Replacing the ADF..............................................................................................................123 Replacing the ADF pickup-roller assembly ........................................................................124 Removing the ADF separation pad....................................................................................130 Replacing the ADF scanner glass......................................................................................132 Replacing the fuser assembly.............................................................................................133 Replacing the control-panel bezel......................................................................................134 Replacing the tray 1 pickup roller and separation pad.......................................................135 Covers.................................................................................................................................................142 Removing the left cover......................................................................................................142 Removing the right cover....................................................................................................145 Removing the right rear cover............................................................................................146 Removing the scanning assembly......................................................................................148 Removing the left rear cover...............................................................................................153 Removing the left upper cover............................................................................................153 Removing the right upper cover..........................................................................................155 Replacing the memory-card assembly (HP Color LaserJet 2840 all-in-one only).............157 Removing the input/output (I/O) cover................................................................................158 Removing the back cover...................................................................................................161 Removing the top cover assembly.....................................................................................162 Removing the upper multipurpose cover............................................................................165 Removing the density sensor and top-of-page sensor.......................................................167 Removing the multipurpose roller cover.............................................................................168 Removing the lower multipurpose cover............................................................................169 Main assemblies..................................................................................................................................172 Removing the control panel................................................................................................172 Removing the left support assembly..................................................................................173 Removing the right support assembly................................................................................174 Removing the laser/scanner assembly...............................................................................175 Removing the transfer-roller plate......................................................................................177 Removing the transfer roller...............................................................................................178 Removing the formatter assemblies...................................................................................180 Removing the formatter cage.............................................................................180 Removing the formatter and line interface unit (LIU).........................................182 Removing the E-label reader (for imaging-drum E-labels).................................................185 Removing the DC controller................................................................................................187 Removing the top plate.......................................................................................................189 Removing the gear assembly.............................................................................................192 Removing the waste-toner sensor......................................................................................195 Removing the rotary-drive assembly..................................................................................196 Removing the print-cartridge carousel................................................................................199 Aligning the carousel gears................................................................................................203 Removing the registration-roller assembly.........................................................................204 Removing the toner-catch tray............................................................................................204 Removing the feed-drive shaft and belts............................................................................205 Removing the power supply cover plate.............................................................................214 Removing the paper-top sensor.........................................................................................218 Removing the fuser-wrap sensor........................................................................................219 Motors and fans...................................................................................................................................222 ENWW vii