Download  Print this page

White Spots - Brother HL-5440D Service Manual

Brother laser printer.
Hide thumbs

Advertisement

White spots

<User Check>
- Turn ON the power switch, and open the front cover and the back
- Select "Improve Toner Fixing" in the driver.
- When the white spots appear at intervals of 45.3 mm, replace the
- Refer to the User's Guide to remove the dirt from the exposure drum
- When the white spots appear at intervals of 94.2 mm, replace the
Step
Dirt on the paper dust cleaning
1
roller of the paper tray
Dirt on electrodes of the drum unit
2
and those of the machine
Dirt on electrodes of the toner
3
cartridge and those of the machine
4
Relay front PCB failure
Toner sensor failure
5
High-voltage power supply PCB
6
failure
7
Main PCB failure
cover. Leave the machine for a while to remove condensation.
toner cartridge with a new one.
using a cotton applicator.
toner cartridge with a new one.
Cause
Paper dust cleaning roller
Fig. 2-10
2-70
Remedy
Refer to the illustration below to clean the
paper dust cleaning roller.
Clean the electrodes of the drum unit and
those of the machine. (Refer to
Fig.
2-7.)
Clean the electrodes of the toner cartridge
and those of the machine. (Refer to
or
Fig.
2-7.)
Replace the relay front PCB ASSY.
Refer to
"1.3.8 Check sensor operation
(function code: 32)" in Chapter 5
the sensor operation. If the sensor operation
is faulty, replace the toner sensor PCB
ASSY.
Replace the high-voltage power supply PCB
ASSY.
Replace the main PCB ASSY.
Fig. 2-6
or
Fig. 2-6
to check
Confidential

Advertisement

Table of Contents

   Related Manuals for Brother HL-5440D

Comments to this Manuals

Symbols: 0
Latest comments: