Brother HL-4150CDN - Hollow Print

2-109
Confidential
■ Unstable color density
■ Hollow print
<User Check>
- Make a print on a different type of paper.
- Replace the belt unit with a new one.
- Replace the drum unit with a new one.
- Replace the waste toner box with a new one.
- Replace the toner cartridge with a new one.
Step Cause Remedy
1 Dirt on drum unit 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 Dirt on toner cartridge
electrode
Clean the electrodes of the toner cartridge
and main body. (Refer to Fig. 2-6 (P2-52)
and Fig. 2-9 (P2-53))
3 Dirt on belt unit electrode Clean the electrodes of the belt unit and main
body. (Refer to Fig. 2-7 (P2-52) and Fig. 2-9
(P2-53))
4 Engine PCB failure Replace the engine PCB ASSY.
5 High-voltage power supply
PCB failure
Replace the high-voltage power supply PCB
ASSY.
6 Laser unit failure Replace the laser unit.
7 Main PCB failure Replace the main PCB ASSY.
<User Check>
- Select “Improve Toner Fixing” in the printer driver, or select “Thicker
Paper” in Paper Type.
- Check the printer’s environment, conditions such as high humidity and
low humidity may cause this situation to occur.
- Make a print on a different type of paper.
- Refer to the User’s guide and remove the dirt on the exposure drum
using a cotton swab.
- Replace the drum unit with a new one.
- Replace the toner cartridge with a new one.
Step Cause Remedy
1 Dirt on the pinch roller of the
paper tray
Refer to Fig. 2-14 (P2-105) and clean the
pinch roller.
2 Exposure drum dirty Refer to "2.8 Drum Cleaning" in Chapter 5
and perform drum cleaning.
3 Fuser unit failure Replace the fuser unit.