Lexmark C510 Service Manual - Page 212

5021-0XX Diagnostic mode To enter the diagnostic mode: 1. Turn the printer Off. 2. Press and hold the Go and Return buttons. 3. Turn the printer On. 4. Release the buttons when "Performing Self Test" displays on the operator panel. The tests display on the operator panel in the order shown: Note: Tray 2 refers to the 530-sheet tray located in the secondary paper feed assembly. • Print registration - Setting Tray 2 left margin (displayed only if Tray 2 is installed) - Setting top margin • Print tests - Tray 1 - Tray 2 (displayed only if Tray 2 is installed) - Print quality pages • Hardware tests - LCD test (operator panel) - Button test (operator panel) - Check engine NVRAM - ROM memory test - Parallel wrap test (available only if the printer is configured with a standard parallel port) - Parallel 1, 2, or 3 wrap test (displayed only if a parallel port is available using PC1 in slot 1) - Serial 1, 2 or 3 wrap test (displayed only if a serial port is available using PC1 slot 1) • Duplex tests (displayed only if duplex unit is installed) - Quick test - Duplex left margin 3-4 Service Manual