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Replace Toner - Brother HL-5440D Service Manual

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Error code 6300

Replace Toner

The toner sensor detected no toner remaining or the number of rotations of the developer
roller has reached the upper limit.
<User Check>
• Replace the toner cartridge.
Step
Toner sensor PCB failure
1
2
Relay front PCB failure
3
Main PCB failure
Error codes 6400 to 6600
These errors do not usually occur during normal use. The possible causes are noise around
the installation site, fluctuation of the power supply voltage, and failures in the software.
---
An unidentified error occurred.
Step
1
Main PCB failure
Error code 6700
Toner Low
The toner sensor detected that the toner remaining has fallen below the specified level or the
developer roller counter has exceeded the specified value.
Step
Toner sensor PCB failure
1
2
Relay front PCB failure
3
Main PCB failure
Error codes 6800 and 6900
These errors do not usually occur during normal use. The possible causes are noise around
the installation site, fluctuation of the power supply voltage, and failures in the software.
---
An unidentified error occurred.
Step
1
Main PCB failure
Cause
Refer to
(function code: 32)" in Chapter 5
sensor operation. If the sensor operation is
faulty, replace the toner sensor PCB ASSY.
Replace the relay front PCB ASSY.
Replace the main PCB ASSY.
Cause
Replace the main PCB ASSY.
Cause
Refer to
(function code: 32)" in Chapter 5
sensor operation. If the sensor operation is
faulty, replace the toner sensor PCB ASSY.
Replace the relay front PCB ASSY.
Replace the main PCB ASSY.
Cause
Replace the main PCB ASSY.
2-36
Remedy
"1.3.8 Check sensor operation
Remedy
Remedy
"1.3.8 Check sensor operation
Remedy
to check the
to check the
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