4-4 Phaser 8400 Color PrinterService DiagnosticsThe printer has built-in diagnostics to aid in troubleshooting problems with theprinter. The Service Diagnostics Menu provides a means to test sensors, motors,switches, clutches, fans and solenoids. Diagnostics also contain functions to reportprinter status and some NVRAM access.Service diagnostics are to be executed through the front panel by a certified servicetechnician only. Service Diagnostics can be entered one of two ways:Entering Service Diagnostics without Rebooting the Printer:This method of entering diagnostics is to allow customers to be diverted to servicediagnostics in order to perform some tests.1. Display the Hidden Service Menu as described in "Hidden Service Menu" onpage 4-2.2. Scroll down to Enter Diagnostics and press the OK button.Entering Service Diagnostics by Rebooting the Printer:1. Turn the printer power OFF.2. Press and hold the Back and Info buttons.3. Turn the printer power ON while continuing to hold the Back and Info buttonsfor approximately 30 seconds until the front panel indicates Diagnostic Menu.Service Diagnostic Front Panel Button DescriptionsButton FunctionBACK Returns to the prior higher level menu structure, if available. Cancels the displayof test results on the front panel.If help text is displayed on the front panel, pressing BACK will restore the currentmenu item and remove the help text.CANCEL Cancels certain functions of the printer.INFO Provides help information, if available.Press any key to advance through the help text.UP Scrolls up one menu item within a menu list. This control does not ‘wrap’.Used to increment data in tests requiring user input.DOWN Scrolls down one menu item within test results.This control does not ‘wrap’.OK Enters the highlighted menu. Executes the current test item.NOTE: Pressing any key may cause an abort if allowed by the test being performed. A powercycle is used to arbitrarily stop a test.
