Brother HL-L3210CW - Page 112

2-93
Confidential
■ One color is light
<User Check>
• Check the usage environment of the machine. Using the machine in hot-humid or cold-dry
conditions can cause this problem.
• Adjust the color calibration from the control panel.
• Replace the drum unit with a new one.
• Replace the toner cartridge with a new one.
• Wipe the LED ASSY with a soft, lint-free cloth. (Refer to the figure below.)
• Use specified paper.
Fig. 2-10
Step Cause Remedy
1
Dirt on the electrodes of the drum
unit and those of the machine
Clean the electrodes of the drum unit and those of
the machine. (Refer to Fig. 2-6 (P2-63) and Fig.
2-7 (P2-63)
.)
2
Dirt on the electrodes of the belt
unit and those of the machine
Clean the electrodes of the belt unit and those of
the machine. (Refer to Fig. 2-6 (P2-63) and Fig.
2-11 (P2-94)
.)
3
Dirt on the electrodes of the high-
voltage power supply PCB
Clean the electrodes of the high-voltage power
supply PCB.
4
Density sensor failure Replace the registration mark sensor L PCB.
5
Fuser unit failure Replace the fuser unit.
6
High-voltage power supply PCB
failure
Replace the high-voltage power supply PCB.
7
LED ASSY failure Replace the appropriate LED ASSY.
8
Main PCB failure Replace the main PCB.