Troubleshooting For Toner And Drum Problems; Cartridge Error (Toner Cartridge Cannot Be Detected) - Brother HL-5440D Service Manual

4.7

Troubleshooting for Toner and Drum Problems

4.7.1 New toner is not detected
<User Check>
- Be sure to set a new toner cartridge.
Step
New toner actuator caught in some
1
sections of the machine
Connection failure of the relay front
2
PCB harness
New toner sensor failure
3
4 Main PCB failure

4.7.2 Cartridge error (toner cartridge cannot be detected)

Failed to determine whether the toner cartridge is new or old
Step
The power switch was turned OFF
or the front cover was opened while
1
a new toner cartridge is being
detected.
2 New toner actuator coming off
New toner sensor failure
3
4.7.3 Drum error
<User Check>
- Clean the corona wire of the drum unit.
- Replace the drum unit with a new one, and reset the drum counter.
Step
Dirt (dust) on electrodes of the
1 drum unit
High-voltage power supply PCB
2
failure
3 Main PCB failure
Cause
Reattach the new toner actuator.
Reconnect the relay front PCB harness.
Refer to
(function code: 32)" in Chapter 5
the sensor operation. If the sensor operation
is faulty, replace the relay front PCB ASSY.
Replace the main PCB ASSY.
Cause
Reset the developer roller counter. (Refer to
"1.4.21 Reset developer roller counter 1, 2,
3 or 4 (Common to all models)" in Chapter
5.)
Reattach the new toner actuator.
Refer to
(function code: 32)" in Chapter 5
the sensor operation. If the sensor operation
is faulty, replace the relay front PCB ASSY.
Cause
Clean the electrodes of the drum unit and
those of the machine. (Refer to
Fig.
Replace the high-voltage power supply
PCB ASSY.
Replace the main PCB ASSY.
2-76
Remedy
"1.3.8 Check sensor operation
Remedy
"1.3.8 Check sensor operation
Remedy
2-7.)
to check
to check
Fig. 2-6 or
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