Drum Error - Brother HL-5440D Service Manual

Error codes 7B00 and 7C00
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 7D00

Drum Error

Detected discharge that may be attributable to dirty corona wire on the drum unit.
<User Check>
• Slide the green tag of the drum unit left and right two to three times to clean the corona
wire.
• Replace the drum unit with a new one.
Step
High-voltage power supply PCB
1
failure
2 Main PCB failure
Error codes 7E00 to 8200
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 8300
Drum Stop
Detected discharge when the number of rotations of the drum has exceeded twice the life
limit.
<User Check>
• Replace the drum unit with a new one, and reset the drum counter.
Step
High-voltage power supply PCB
1
failure
2 Main PCB failure
Cause
Replace the main PCB ASSY.
Cause
Replace the high-voltage power supply PCB
ASSY.
Replace the main PCB ASSY.
Cause
Replace the main PCB ASSY.
Cause
Replace the high-voltage power supply PCB
ASSY.
Replace the main PCB ASSY.
2-40
Remedy
Remedy
Remedy
Remedy
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