5 Removal and replacement Introduction ......................................................................................................................................... 94 Removal and replacement strategy .................................................................................. 94 Electrostatic discharge ....................................................................................................... 94 User-replaceable parts ...................................................................................................... 94 Required tools ...................................................................................................................
95 Before performing service .................................................................................................. 95 After performing service ..................................................................................................... 96 Post-service tests .............................................................................................................. 96 Test 1 (print-quality test) ................................................................................... 96 Test 2 (copy-quality test) ...................................................................................
96 Test 3 (fax-quality test) ...................................................................................... 97 Parts removal order ........................................................................................................... 98 Remove the print cartridge ................................................................................................ 99 External panels, covers, and doors .................................................................................................. 100 Right cover .......................................................................................................................
100 Left cover ......................................................................................................................... 102 Print-cartridge door .......................................................................................................... 104 Rear cover ....................................................................................................................... 106 Top cover ......................................................................................................................... 108 Replace the ADF pickup-roller assembly .........................................................................................
110 ADF scanner glass ........................................................................................................................... 113 ADF assembly .................................................................................................................................. 115 Scanner/ADF assembly .................................................................................................................... 117 Bezel and control panel ....................................................................................................................
119 Internal assemblies .......................................................................................................................... 122 Convenience-stapler assembly (HP LaserJet M2727nfs only) ........................................ 122 Convenience-stapler power supply (HP LaserJet M2727nfs only) .................................. 124 Convenience-stapler AC inlet cable (HP LaserJet M2727nfs only) ................................. 126 Convenience-stapler power supply bracket and strap (HP LaserJet M2727nfs only) ..... 127 Speaker ...........................................................................................................................
128 Power-switch PCA ........................................................................................................... 130 Formatter ......................................................................................................................... 132 Duplex assembly ............................................................................................................. 135 Laser/scanner (print engine) ............................................................................................ 137 Memory-tag-reader assembly (E-label reader) ................................................................
139 Fan ................................................................................................................................... 141 Duplex-drive gears ........................................................................................................... 143 Duplex solenoid ............................................................................................................... 145 Fuser ................................................................................................................................ 147 Interlock assembly ...........................................................................................................
152 Engine controller assembly (ECU) ................................................................................... 153 Main motor ....................................................................................................................... 158 Pickup-and-feed assemblies ............................................................................................ 160 Transfer roller .................................................................................................. 160 Registration-roller assembly ............................................................................................
161 Main gear assembly and tray 2 pickup solenoid .............................................................. 162 6 Solve problems Problem-solving checklist ................................................................................................................. 166 vi ENWW