HP 1320 Service Manual - Page 151

7 Troubleshooting Chapter contents Chapter contents...139 Basic troubleshooting...141 Paper-handling problems ...144 Paper jam ...144 Print is skewed (crooked 144 More than one sheet of media feeds through the printer at one time 144 Printer does not pull media from the media input tray 145 Printer curled the media 145 Printed media does not exit to the correct path 145 Print job is extremely slow 145 Paper-path troubleshooting...146 Solving print paper-feed problems 146 Printed page is different than what appeared on screen 148 Garbled, incorrect, or incomplete text 148 Missing graphics or text, or blank pages 148 Page format is different than on another printer 149 Graphics quality ...149 Status light patterns ...150 Fatal error secondary messages 156 Accessory error secondary messages 159 Troubleshooting postscript (PS) errors 160 Image troubleshooting...161 Print cartridge problems 161 Solving image-quality problems 162 Clearing jams ...170 Print-cartridge area ...170 Input trays ...172 Output bin ...176 Straight-through output path 176 Automatic two-sided printing (duplexing) path 178 Functional checks...182 Engine test...182 Printing an engine test...182 Half self-test functional check 183 To perform a half self-test check 183 To perform other checks 183 Drum rotation functional check 184 Heating element check...185 High-voltage contacts check 186 To check the print cartridge contacts 186 To check the high-voltage connector assembly 186 ENWW Chapter contents 139