Engine Test The printer has one test pattern (vertical lines). When an image defect appears, a test print can be made to identify the problem. The test print can be made by pressing the test print switch located on the left side of the printer (see Figure 7-2 on page 7-12). A test pattern can be printed by pressing the test print switch once after the Photosensitive Drum has stopped and the printer has entered the standby mode. If the switch is held down, the test pattern is printed continuously. The switch can be used when paper is loaded in any tray other than Tray 1. The Engine Test does the following:
G Verifies that the Print Engine is functioning correctly (the Formatter PCA is completely bypassed during an Engine Test) G Is used for isolating printer problems G Is used for checking and adjusting registration G Prints from Tray 2, 3, or 4 only, not from Tray 1 G Can be activated with the Formatter PCA removed Note For the printer to perform an Engine Test, Tray 2, 3, or 4 must be installed and loaded with paper, and the Toner Cartridge must be installed in the printer. Location of Engine Test Button The Engine Test button is located on the left side of the printer, below the Fan vent, as shown in Figure 7-2 on page 7-12. Troubleshooting the Printing System 7-11