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Message Description Action
54.31 - Media Sensor Abnormality/ After-
adjustment Value Out of Spec
1. Try to calibrate the media sensor again.
2. Dirty media sensor. Clean the media
sensor.
3. The connectors in the media detection
signal line are not properly connected.
Reseat the media sensor connector J601,
relay connector J5026, and DC controller
PCB connector J1008.
4. Defective media sensor. Replace the
media sensor.
5. Defective DC controller PCB. Replace
the DC controller PCB.
54.XX PRINTER
ERROR continued
for 54.32 error:
The image density adjustment
value, color misregistration
adjustment value, and PWM
adjustment value (see note below)
are stored in the EEPROM
(NVRAM) of the formatter.
Whenever a formatter or laser/
scanner unit is replaced, you must
calibrate the printer to update the
values.
a. Image density adjustment (on
formatter replacement)
b. Color misregistration adjustment
(on formatter replacement)
c. PWM adjustment (on both
formatter and laser/scanner unit
replacement)
NOTE
The PWM adjustment value enables
reproduction of an image in the best
tone. The formatter determines the
value based on the amount of laser
light received from the printer engine.
54.32 -
Electrical Adjustment
When the media sensor is replaced, the
light intensity of the sensor must be
adjusted. Follow the procedure below to
adjust the light intensity.
1. Turn the printer OFF.
2. Open the front door.
3. While pressing down the engine test
print switch, turn the printer ON.
4. Close the front door.
5. Load paper into Tray 1 (use plain white
paper for test printing).
6. As the printer goes into READY period,
press the engine test print switch and test
print.
7. One sheet of paper will be fed into the
printer from Tray 1 and will be delivered to
the face-down delivery tray.
54.33 -
1. Defective laser/scanner. Replace the
laser/scanner unit.
2. Defective DC controller PCB. Replace
the DC controller PCB.
Table 7-3. Numerical printer messages (continued)
344 Chapter 7 Troubleshooting ENWW