Brother DCP-L3510CDW, Service Manual

Page: 161 / 430

2-125
Confidential
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Vertical streaks in a dark background
<User Check>
• Clean the corona wire of the drum unit.
• This problem may disappear after printing multiple sheets of paper.
• Refer to <How to clean the drum unit> to remove the dirt from the exposure drum using a
cotton applicator.
• Turn ON the power switch, and leave the machine for a while.
• Wipe the LED ASSY with a soft, lint-free cloth. (Refer to Fig. 2-15 (P2-118) .)
• Replace the drum unit with a new one.
• Replace the toner cartridge with a new one.
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Horizontal stripes
Step Cause Remedy
1
Dirty charge electrodes Clean the electrodes of the drum unit and
those of the machine. (Refer to
Fig. 2-12 (P2-
78) and Fig. 2-11 (P2-78) .)
2 LED ASSY failure Replace the appropriate LED ASSY.
<User Check>
• Clean the corona wire of the drum unit.
• This problem may disappear after printing multiple sheets of paper.
• Refer to
<How to clean the drum unit> to remove the dirt from the
exposure drum using a cotton applicator.
• Replace the drum unit with a new one.
• Replace the toner cartridge with a new one.
Step Cause Remedy
1
Dirty charge electrodes Clean the electrodes of the drum unit and
those of the machine. (Refer to
Fig. 2-12 (P2-
78) and Fig. 2-11 (P2-78) .)
2
A ground wire or ground plate
installation failure (Grounding
is not performed correctly.) Retighten the screws of each ground wire or
ground plate. Repair the bend of the tray
ground spring of the T1.
(Refer to
Fig. 2-18 (P2-124) .)
3 Scratch or dirt on the fuser unit Replace the fuser unit.
4
High-voltage power supply
PCB failure Replace the high-voltage power supply PCB.