Fatal error secondary messages ....................................................................................................... 147 Accessory error secondary messages .............................................................................................. 150 Media problemsolving ........................................................................................................................ 151 Printed page is different from what appeared on screen .................................................................. 153 Garbled, incorrect, or incomplete text ...............................................................................
153 Missing graphics or text, or blank pages .......................................................................... 153 Page format is different from another HP LaserJet printer ............................................... 154 Graphics quality ................................................................................................................ 154 Image problem solving ...................................................................................................................... 155 Light print or faded ............................................................................................................
155 Toner specks .................................................................................................................... 155 Dropouts ........................................................................................................................... 155 Vertical lines ...................................................................................................................... 156 Gray background .............................................................................................................. 156 Toner smear ......................................................................................................................
156 Loose toner ....................................................................................................................... 157 Vertical repetitive defects .................................................................................................. 157 Misformed characters ....................................................................................................... 157 Page skew ........................................................................................................................ 158 Curl or wave ......................................................................................................................
158 Wrinkles or creases .......................................................................................................... 158 Toner scatter outline ......................................................................................................... 159 Clear jams .......................................................................................................................................... 160 Print-cartridge area ........................................................................................................... 160 Input trays .........................................................................................................................
162 Output bin ......................................................................................................................... 165 Straight-through output path ............................................................................................. 166 Automatic two-sided printing path .................................................................................... 167 Diagnostic resources ......................................................................................................................... 172 Engine test ........................................................................................................................
172 Continuous self-test .......................................................................................................... 172 Half self-test functional check ........................................................................................... 173 Drum rotation functional check ........................................................................................ 173 Heating element check ..................................................................................................... 173 High-voltage contacts check .............................................................................................
174 Checking the print cartridge contacts ............................................................ 174 Checking the high-voltage connector assembly ............................................. 175 Network-setup problemsolving .......................................................................................................... 176 Reset the printer ................................................................................................................................ 177 NVRAM initialization .........................................................................................................
177 Super NVRAM initialization ............................................................................................... 177 Network reset .................................................................................................................... 178 Cold reset .......................................................................................................................... 178 Troubleshooting tools and reference diagrams ................................................................................. 179 Repetitive image defects ..................................................................................................
179 General timing chart ......................................................................................................... 180 Circuit diagram .................................................................................................................. 181 Solenoids .......................................................................................................................... 183 Switches and sensors ....................................................................................................... 184 Rollers and pads ............................................................................................................... 185 vi ENWW