Brother HL-4570CDW - Horizontal Lines

2-107
Confidential
■ Downward fogging of solid color
■ Horizontal lines
■ Ghost
<User Check>
- Toner may be empty. Replace the toner cartridge with a new one.
Step Cause Remedy
1 High-voltage power supply
PCB failure
Replace the high-voltage power supply PCB
ASSY.
2 Engine PCB failure Replace the engine PCB ASSY.
3 Main PCB failure Replace the main PCB ASSY.
<User Check>
- The paper tray ground terminal provided in the printer
body may be dirty. Clean the contact with a dry cloth.
- This symptom might stop occurring after making
several prints.
If the symptom continues, replace the drum unit
cartridge with a new one.
- Replace the toner cartridge with a new one.
Step Cause Remedy
1 Dirt on charged electrode Clean the electrodes of the drum unit and
main body. (Refer to Fig. 2-6 (P2-52) and
Fig. 2-9 (P2-53))
2 Paper tray ground terminal
provided in printer body
Correct bending of paper tray ground
terminal.
3 Scratch on the heat roller Replace the fuser unit.
4 High-voltage power supply
PCB failure
Replace the high-voltage power supply PCB
ASSY.
<User Check>
- Check the printer’s environment, conditions such as high humidity may
cause this situation to occur.
- Check that the appropriate media type is selected in the printer driver.
- Make a print in the color mode.
- Replace the drum unit with a new one.
Step Cause Remedy
1 Erase lamp lens dirty Clean the erase lamp lens. (Refer to Fig. 2-6
(P2-52) and Fig. 2-9 (P2-53))
2 High-voltage power supply
PCB failure
Replace the high-voltage power supply PCB
ASSY.
3 Engine PCB failure Replace the engine PCB ASSY.
4 Fuser unit failure Replace the fuser unit.