Brother DCP-L3510CDW, Service Manual

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2-118
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. 2-15
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. 2-11 (P2-78)
and
Fig. 2-12 (P2-78)
.)
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. 2-11 (P2-78)
and
Fig. 2-16 (P2-119)
.)
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.