8. Error Code List
GT-3 Series
361
Error
code
Message
Meaning
Solution
5421
5422
Machine Error
Failure of moving Pump in the
Maintenance Unit
Confirm if something covers the hole on Pump
Rotor Gear. Clean to keep the transparency.
Confirm the motion of Pump Motor and Pump
Rotation Sensor.
5431
5432
5433
5434
5435
Machine Error
Failure of moving Caps in the
Maintenance Unit
5441
5442
5443
Machine Error
Failure of moving Wipers in the
Maintenance Unit
Confirm if the Wiper Cleaners and Wiper Blades
are properly mounted in the Maintenance Unit.
Confirm if the Wiper Cleaners are distorted.
Confirm that something may prevent the Caps
moving up and down and/or Wipers moving
horizontally.
Confirm the Cap Motor and Cap Origin Sensor if
they work properly.
Confirm the Wiper Motor and Wiper Origin Sensor
if they work properly.
5451
5452
5453
Machine Error
Internal error of Maintenance Unit
caused by firmware update
Upgrade the firmware again from the beginning.
Replace the Maintenance PCB.
5454
5455
5456
5457
Machine Error
Communication error between
Main PCB and the Maintenance
Unit caused by firmware update
Confirm if there is any device around GT-3 that
makes strong noise. Move GT-3 from that device.
Upgrade the firmware again from the beginning.
Confirm the connection of Harness: Maintenance
COM between Main PCB and Maintenance PCB.
Replace the Maintenance PCB.
5458
Machine Error
Internal error of Maintenance Unit
caused by firmware update
Upgrade the firmware again from the beginning.
Replace the Maintenance PCB.
5471
5472
5473
5474
5475
5476
5477
5478
Machine Error
Communication error between
Maintenance Unit and Ink Sensor
PCB
Confirm if there is any device around GT-3 that
makes strong noise. Move GT-3 from that device.
Confirm the Harness: Ink Sensor between Ink
Switch PCB Assy and Ink Sensor PCB Assy.
Confirm the Harness: Ink MNT between
Maintenance PCB and Ink Switch PCB Assy.
5491
Machine Error
Internal Error of Maintenance Unit
Turn OFF and ON the printer.
The issue is in firmware; contact Brother via your
dealer.
6004
Clearance Sensor
Failure
Malfunction of Clearance Sensor
Confirm the motions of Solenoid Jam Assy, the
Sensor Flap Dog and Photo Interrupter.
Replace the Main PCB.