Duplexing drive unit removal and replacement ................................................................ 124 Duplexing-driver PCA removal and replacement ............................................................. 129 6 Troubleshooting Troubleshooting process ................................................................................................................... 134 Troubleshooting checklist ................................................................................................. 134 Control-panel messages ....................................................................................................................
136 Alert and warning messages ............................................................................................ 136 Status-log messages ........................................................................................................ 140 Clearing jams ..................................................................................................................................... 142 Where to look for jams ...................................................................................................... 142 To clear jams from inside the printer ................................................................................
143 To clear jams from the duplex area (HP Color LaserJet 2605dn and 2605dtn models only) .................................................................................................................................. 144 To clear jams from the top bin (HP Color LaserJet 2605) ................................................ 146 To clear jams from the top output area (HP Color LaserJet 2605dn and 2605dtn models only) ...................................................................................................................... 147 To clear jams from Tray 2 or optional Tray 3 ....................................................................
149 E-Label reader guide pin damage ..................................................................................................... 150 Print problems .................................................................................................................................... 151 Printed image quality problems ........................................................................................ 151 Improving print quality ...................................................................................... 151 Paper Types menu ..........................................................................
151 Print Modes menu ........................................................................... 151 Print quality menu ............................................................................ 152 Understanding print-quality settings ................................................................. 153 To temporarily change print-quality settings ................................... 153 To change print-quality settings for all future jobs .......................... 153 Identifying and correcting printed image defects ............................................. 153 Print-quality checklist .......................................................................
154 General print quality issues .............................................................................. 154 Solving issues with color documents ............................................................... 158 Paper handling issues ...................................................................................................... 160 Wrong size/type media ..................................................................................... 160 Cannot select a tray or feature to use .............................................................. 161 Performance problems .....................................................................................................
161 Functional tests (SERVICE ONLY) ................................................................................................... 163 Engine-test print ................................................................................................................ 163 Service mode functions (SERVICE ONLY) ....................................................................................... 164 Cold reset .......................................................................................................................... 164 NVRAM initializer ..............................................................................................................
164 Super NVRAM initializer ................................................................................................... 164 Restoring page counts and serial number ........................................................................ 165 Cleaning the ETB .............................................................................................................. 165 Troubleshooting tools ........................................................................................................................ 166 Printer pages and reports .................................................................................................
166 Demo page ....................................................................................................... 166 Configuration page ........................................................................................... 167 Supplies Status page ....................................................................................... 167 Fuser cleaning page ......................................................................................... 167 vi ENWW