3-4 Service Manual
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
