Fuser Error - Brother HL-5440D Service Manual

Error code 5800

Fuser Error

Any of error codes 6A00 to 6F00, 7600, 7800, DD00, DE00, or E200 (fuser unit error)
occurred when the power switch was turned ON or sleep mode was released.
Error code 5900
Self-Diagnostic
Rechecking the error after the power switch was turned OFF and then ON again because an
error was detected by the center thermistor of the fuser unit.
(This message is displayed for approximately 15 minutes when the machine is restarted after
error code 5800 has occurred.)
Step
Connection failure of the fuser
1
unit harnesses
Connection failure of the eject
2
sensor PCB harness
3 Fuser unit failure
Eject sensor PCB failure
4
Low-voltage power supply PCB
5
failure
6 Main PCB failure
CAUTION:
• Turn OFF the power switch. After the fuser unit has cooled sufficiently, turn ON the
power switch again and leave the machine for ten minutes. This problem may then be
cleared.
Error codes 5A00 to 6200
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
Check the connection of fuser unit harnesses,
and reconnect them if necessary.
Check the connection of the eject sensor PCB
harness, and reconnect it if necessary.
Replace the fuser unit.
Refer to
(function code: 32)" in Chapter 5
sensor operation. If the sensor operation is
faulty, replace the eject sensor PCB ASSY.
Replace the low-voltage power supply PCB
ASSY.
Replace the main PCB ASSY.
Cause
Replace the main PCB ASSY.
2-35
Remedy
"1.3.8 Check sensor operation
Remedy
to check the
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