2-10 Phaser 4400 Laser Printer Service ManualEngine Test PrintThe Engine Test Print test pattern (shown on page 4-4) is stored in the Engine LogicBoard and is accessible through Service Diagnostics. You can use the Engine TestPrint to identify, repair, and validate the operability of printer xerographics and paperhandling from all paper sources, options, and output destinations. When you selectEngine Test Print from the main Service Diagnostics menu, the following selectionsare available:Print Test Pattern ó Starts the printInput Tray ó Allows you to select the paper sourceOutput Tray ó Allows you to select the test print destinationDuplex ó Turns duplexing on or off if the Duplex Unit is installedPrint Quantity ó Allows you to select the number of test prints to runError and Jam RecoveryIf the printer encounters a problem while printing the Engine Test Print, it haltsprinting and displays an error message on the Front Panel. Refer to the DiagnosticMessages in the Print Engine Error Messages table that follows. (The DiagnosticMessages also appear as secondary headings in the Troubleshooting Procedures.)Printing resumes after the problem has been fixed.Engine NVRAM Default SettingsThe following table lists the defaults for each of the Engine NVRAM Adjustmentsexcept the paper size adjustments, which have no default settings.NVRAM Default TableEngine NVRAMAdjustmentDefaultValueRange Engine NVRAMAdjustmentsDefaultValueRangeLaser Power 10 0 - 15 Tray 2 Scan Direction 3 0 - 8Tray 1 ProcessDirection8 0 - 15 Tray 3 Scan Direction 2 0 - 8Tray 2 ProcessDirection8 0 - 15 Envelope Scan Direction 4 0 - 8Tray 3 ProcessDirection8 0 - 15 MPT Scan Direction 6 0 - 8Envelope ProcessDirection8 0 - 15 Duplex ProcessDirection8 0 - 15MPT ProcessDirection8 0 - 15 Duplex Scan Direction 4 0 - 8Tray 1 ScanDirection4 0 - 8
