Xerox 4400DT Service Manual - Page 47

Engine Test Print The Engine Test Print test pattern (shown on page 4-4) is stored in the Engine Logic Board and is accessible through Service Diagnostics. You can use the Engine Test Print to identify, repair, and validate the operability of printer xerographics and paper handling from all paper sources, options, and output destinations. When you select Engine Test Print from the main Service Diagnostics menu, the following selections are available: Print Test Pattern - Starts the print Input Tray - Allows you to select the paper source Output Tray - Allows you to select the test print destination Duplex - Turns duplexing on or off if the Duplex Unit is installed Print Quantity - Allows you to select the number of test prints to run Error and Jam Recovery If the printer encounters a problem while printing the Engine Test Print, it halts printing and displays an error message on the Front Panel. Refer to the Diagnostic Messages in the Print Engine Error Messages table that follows. (The Diagnostic Messages also appear as secondary headings in the Troubleshooting Procedures.) Printing resumes after the problem has been fixed. Engine NVRAM Default Settings The following table lists the defaults for each of the Engine NVRAM Adjustments except the paper size adjustments, which have no default settings. NVRAM Default Table Engine NVRAM Adjustment Laser Power Tray 1 Process Direction Tray 2 Process Direction Tray 3 Process Direction Envelope Process Direction MPT Process Direction Tray 1 Scan Direction Default Value 10 8 Range 0 - 15 0 - 15 8 0 - 15 8 0 - 15 8 0 - 15 8 0 - 15 4 0 - 8 Engine NVRAM Adjustments Tray 2 Scan Direction Tray 3 Scan Direction Default Range Value 3 0 - 8 2 0 - 8 Envelope Scan Direction 4 0 - 8 MPT Scan Direction 6 0 - 8 Duplex Process 8 Direction Duplex Scan Direction 4 0 - 15 0 - 8 2-10 Phaser 4400 Laser Printer Service Manual