Print Modes menu.............................................................................122 Print quality menu..............................................................................122 Understanding print-quality settings...................................................................123 To temporarily change print-quality settings.....................................123 To change print-quality settings for all future jobs............................123 Identifying and correcting printed image defects...............................................124 Print-quality checklist.........................................................................124 Paper handling issues........................................................................................................124 Wrong size/type media.......................................................................................124 Cannot select a tray or feature to use................................................................125 Performance problems.......................................................................................................125 Functional tests (service only).............................................................................................................127 Engine test print..................................................................................................................127 Service mode functions (service only).................................................................................................128 Cold reset............................................................................................................................128 NVRAM initializer................................................................................................................128 Super NVRAM initializer.....................................................................................................128 Restoring page counts and serial number..........................................................................129 Cleaning the ETB................................................................................................................129 Troubleshooting tools..........................................................................................................................130 Printer pages and reports...................................................................................................130 Demo page.........................................................................................................130 Configuration page.............................................................................................131 Event log............................................................................................................132 Supplies Status page.........................................................................................132 Fuser cleaning page...........................................................................................133 Print quality troubleshooting pages....................................................................133 Control panel messages (error codes)..............................................................133 Alert and warning messages.............................................................133 Critical error messages.....................................................................135 Supplies messages...........................................................................135 Status messages................................................................................................................138 Status log only messages...................................................................................................139 Service menu......................................................................................................................139 Restoring the factory-set defaults......................................................................139 To restore the factory-set defaults....................................................139 General print quality issues................................................................................................139 Solving issues with color documents..................................................................................143 HP Toolbox..........................................................................................................................................146 HP Toolbox.........................................................................................................................146 To view HP Toolbox...........................................................................................146 Troubleshooting tab...........................................................................................146 Print quality troubleshooting pages....................................................................................146 Printer calibration................................................................................................................146 Cleaning page.....................................................................................................................146 Configuration page..............................................................................................................147 Diagnostic resources...........................................................................................................................148 Reports menu.....................................................................................................................148 Web diagnostics tools.........................................................................................................148 Repetitive image defect ruler...............................................................................................................149 vi ENWW