Lexmark C912 Service Manual - Page 156

5055-xxx Diagnostic Mode To access the diagnostics printer settings and operations: 1. Turn off the printer. 2. Press and hold Go and Return. 3. Turn on the printer. Release the buttons after the Performing Self Test message is displayed.The alignment menu displays first. 4. Press Select and using the menu key, scroll to Alignment Test. 5. Press Select to print the test. This prints the three color registration pages. These pages are the same for X, Y, Theta, and for the three colors and are available under the X Adjustment, Y Adjustment, and the Theta Adjustment. 6. There are three adjustments for each color registration; X, Y, and Theta. Adjust X and Y first, and then adjust Theta. X controls the horizontal plane. By adjusting X you move the radar image left (negative) and right (positive). Y controls the vertical plane and by adjusting the value for Y you move the color radar image up (negative) and down (positive). These values are determined by examining the left side of the radar page. Values for X are 1/600th of an inch and Y values are 1/2400th of an inch. 7. Theta controls the skew or angle of rotation. To get the correct reading, adjust X and Y before Theta. 8. Examine the left side radar images for their deviation from black. Look at all the radar images along the left and make a judgment on the value of the adjustment. When the color is correctly adjusted, the color radar image should lay directly on the black radar image. 3-6 Service Manual