Lexmark 4076-0XX - Manual (Page 39)

4076-0XX
Diagnostic Aids 27
Encoder Sensor Test
Release the button after the maintenance station uncaps the print
head.
For this test the bottom three operator panel lights display the cur-
rent carrier position as determined by the carrier encoder. The
printer motors are disabled during this test to allow you to manually
move the carrier to verify the encoder is working correctly. The bot-
tom 3 lights will repeat a count of 0 to 7 as you move the carrier
across the machine with the Ink Low Light = 1, the Paper Out Light =
2, and the Busy Light = 4.
If the lights do not change, replace the print head cable.If the lights
appear to have a break in the sequence, replace the encoder strip. If
the bottom 3 lights do not come on, replace the print head cable. If
the symptom remains, replace the system board.
Hex Print
Perform this test with a black print cartridge installed.
Use this test to put the printer in hex mode. The printer prints in
hexadecimal instead of ASCII.