Brother HL-2250DN - Faulty Registration; Dark

2-31
Confidential
4.2.2 Faulty registration
4.2.3 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" (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 printer'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.
Step Cause Remedy
1
Dirt on the electrodes of the drum
unit and the printer body
Clean the electrodes of the drum unit and
printer body. (Refer to Fig. 2-8, Fig. 2-9.)
2
High voltage power supply PCB
ASSY failure
Replace the high voltage power supply
PCB ASSY.
3 Main PCB failure Replace the main PCB ASSY.
4 Laser unit failure Replace the laser unit.