Required tools.....................................................................................................................144 Before performing service...................................................................................................145 After completing service.....................................................................................................145 Screws that are used in the MFP........................................................................................146 User-replaceable parts........................................................................................................................147 Print cartridge......................................................................................................................148 Control-panel overlays........................................................................................................148 Control panel.......................................................................................................................149 Transfer roller......................................................................................................................150 ADF input tray.....................................................................................................................151 ADF pickup and feed rollers...............................................................................................153 ADF separation pad............................................................................................................154 ADF delivery guide (clear mylar sheet)..............................................................................155 Output-bin assembly...........................................................................................................157 Duplex-printing unit.............................................................................................................158 Fuser-entrance guide..........................................................................................................159 Fuser...................................................................................................................................160 Tray 2, 3, 4, or 5 pickup and feed rollers............................................................................161 Tray 1 pickup roller.............................................................................................................162 Scanner filter cover and scanner filter................................................................................163 ADF-hinge flap....................................................................................................................164 Formatter cover and formatter............................................................................................166 Hard drive...........................................................................................................................168 DIMMs.................................................................................................................................170 Flash memory card (firmware)............................................................................................171 Fax accessory.....................................................................................................................172 Covers, doors, and external panels.....................................................................................................173 Top-cover flatbed flange.....................................................................................................174 Front cover..........................................................................................................................175 Back cover..........................................................................................................................179 Internal assemblies..............................................................................................................................181 Reversing-separation-guide assembly ..............................................................................182 Reversing assembly............................................................................................................183 Main fan (FN101) and reversing-unit fan (FN103).............................................................188 Thermistor (TH3).................................................................................................................193 Tray 2 jam-access-cover switch (SW105)..........................................................................195 Tray 1 assembly..................................................................................................................197 Front-cover support.............................................................................................................200 Tray 1 feed-assembly.........................................................................................................201 Feed-roller assembly..........................................................................................................208 DC controller.......................................................................................................................211 Main motor (M101)..............................................................................................................214 DC controller fan (FN104)...................................................................................................215 Print-cartridge fan (FN102).................................................................................................217 Print-cartridge motor (M102)...............................................................................................219 Top-cover switch (SW101).................................................................................................221 Registration assembly........................................................................................................223 Paper-pickup-drive assembly ............................................................................................227 Lifter-drive assembly...........................................................................................................231 Power-factor-correction (PFC) power supply.....................................................................234 ix