Required tools ................................................................................................................. 109 Before performing service ................................................................................................ 109 After performing service ................................................................................................... 110 Post-service tests ............................................................................................................ 110 Test 1 (print-quality test) .................................................................................
110 Test 2 (copy-quality test) ................................................................................. 110 Test 3 (fax-quality test) .................................................................................... 111 Parts removal order ......................................................................................................... 112 Remove the print cartridge .............................................................................................. 113 External panels, covers, and doors ..................................................................................................
114 Right cover ....................................................................................................................... 114 Left cover ......................................................................................................................... 116 Print-cartridge door .......................................................................................................... 118 Rear cover ....................................................................................................................... 120 Top cover .........................................................................................................................
122 Replacing the ADF pickup-roller assembly ...................................................................................... 124 ADF assembly .................................................................................................................................. 127 Scanner/ADF assembly .................................................................................................................... 129 Bezel and control panel ....................................................................................................................
131 Internal assemblies .......................................................................................................................... 134 Convenience-stapler assembly (HP LaserJet 3392 only) ................................................ 134 Convenience-stapler power supply (HP LaserJet 3392 only) .......................................... 136 Convenience-stapler ac inlet cable (HP LaserJet 3392 only) .......................................... 138 Convenience-stapler power supply bracket and strap (HP LaserJet 3392 only) ............. 139 Speaker ...........................................................................................................................
140 Power-switch PCA ........................................................................................................... 142 Formatter ......................................................................................................................... 143 Duplex assembly ............................................................................................................. 146 Laser/scanner .................................................................................................................. 148 Memory-tag-reader assembly ..........................................................................................
150 Fuser ................................................................................................................................ 152 Fan .................................................................................................................. 152 Duplex-drive gears .......................................................................................... 154 Duplex solenoid ............................................................................................... 155 Fuser ................................................................................................................................
157 Interlock assembly ........................................................................................................... 163 ECU ................................................................................................................................. 164 Main motor ....................................................................................................................... 169 Pickup-and-feed assemblies ............................................................................................ 171 Transfer roller ..................................................................................................
171 Registration-roller assembly ............................................................................................ 172 Main gear assembly and tray 2 pickup solenoid .............................................................. 173 6 Troubleshooting Troubleshooting process .................................................................................................................. 178 Troubleshooting checklist ................................................................................................ 178 Jams .................................................................................................................................................
181 Causes of jams ................................................................................................................ 181 Tips to avoid jams ............................................................................................................ 182 Where to look for jams ..................................................................................................... 182 viii ENWW