WorkCentre Pro 423/428 2-140 CHAPTER 2 TROUBLESHOOTING03/02 How to use the Diagnostic C/E Mode2.4 How to Use the Diagnostic (C/E) Mode2.4.1 Entering the Diagnostic (C/E) Mode Turn the power on. While holding the numeric key 0 down for three or more seconds, press the Start button. If you have entered Diagnostic. mode from the copy or fax screen, display the Menuscreen by pressing "Feature Selection" button.2.4.2 Exiting the Diagnostic (C/E) ModeWhile holding the numeric key 0 down, press the Start button. If diagnosis is in progress, press the Stop button to stop the diagnosis. Press the Re-start button.2.4.3 Entering the Chain FunctionPress the "Feature Selection" button. to display the Menu screen as needed. Select LCD panel buttons in the following order:“Custom Presets“ -> “Diagnostics“ -> “Chain Function“-> “Chain No.“ Enter a chain code using the key pad. Press the Function No. button. Enter a function code using the key pad. Press the Start button to execute the diagnostics.If the Chain No. button is then selected, diagnosis is not executed.The Diag. mode screens are hierarchical as follows:Menu ScreenSpecifications SettingDiagnosticsAuto DiagChain FuncMemory R/WMemory ClearPrint Report/ListSelf-Diagnostic Report2.4.4 Changing the Chain FunctionPress the Chain No. or Function No. button again. After confirming that the input code has been cleared, enter a new code.When changing both the Chain and Function codes, change the Chain code first.The Chain code cannot be changed alone.2.4.5 Memory Read/WriteDisplay and change the MF-SYS memory contents or system data.Data display and input formatsl Hexadecimal input (0 to 10, A, B, C, D, E, and F)l Decimal input (0 to 10)l Binary input (0 or 1) Address inputl Up to 6 hexadecimal digits can be entered. Hexadecimal input methodl For input from A to F, use the LCD panel buttons.2.4.6 Memory ClearInitialize various data affecting operations, and erase or initialize data registered or set by theuser.The data is cleared by USER, SYSTEM, or ALL Clear. The table below lists the three type ofclearance.Noval DataUSER CECounter History OperationstatusManagementdivisionComm.managementOtherFILEUSERCleary - - - - y - y ySYSTEMClear- y - - - - - - yALL Clear y y y y y y y y yy: Cleared or initialized -: Not cleared or initializedUSER:: User setting data SYSTEM: Setting data in CE mode