2-82
Confidential
■ Faulty registration
■ Dark
User Check
• Check that the appropriate media type is selected in the
driver.
Step Cause Remedy
1
Adjusted value of the laser unit
mistake
Refer to
"2.1 Inputting the Adjusted Value of
the Laser Unit" in Chapter 4
, and enter the
adjusted value of the laser unit again.
2
Registration rear actuator catching
on some position
Correct catching of the registration rear
actuator.
User Check
• Check the machine's environment. High temperature and high
humidity or low temperature and low humidity conditions can cause
this problem.
• Adjust the density by the Density Adjustment.
• Clean the corona wire of drum unit.
• Replace the drum unit with a new one.
• Replace the toner cartridge with a new one. If remove the used
toner cartridge and replace a relatively new used toner cartridge,
this case is caused.
• If this problem occurs immediately after deep sleep mode is
released, update the firmware to the latest version. If updating the
firmware is not possible, open and close the front cover, and then
retry printing after the main motor has stopped.
Step Cause Remedy
1
Dirt on the electrodes of the drum
unit and the machine body
Clean the electrodes of the drum unit and
machine body. (Refer to Fig. 2-11, Fig. 2-
12.)
2
High voltage power supply PCB
ASSY failure
Replace the high voltage power supply
PCB ASSY.
3 Laser unit failure Replace the laser unit.
4 Main PCB failure Replace the main PCB ASSY.