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Brother MFC 8480 / 8890 – Replace Fuser Message and Fuser Replacement

Instructions on how to resolve the Replace Fuser Message and Replacement Procedure For the Brother 8480 and 8890

The replace fuser message on these machines shows up after 100,000 copies or prints. I’ve seen these fuser last a bit longer but anytime I’ve been called out onsite for this message after looking over the fusing assembly it was in the customers best interest to replace it. Below is the instructions on how to replace the part. After you replace the part the internal counter will need to be reset. Also if you need to replace the fusing assembly before you get the message you should reset the counter to show the actual usage on the part.
Brother LU7939001 Fuser Assembly LU8233001 DCP-8080DN 8480DN 8890DW

Replace Fuser Message Reset Procedure

1. Press the 3 and 9 buttons on the control panel at the same time
2. The display will say reset at the top and below it will be a list of parts
3. Scroll down to FUSER and press OK
4. The display will say 1. Reset 2. Exit. Press 1 to reset.
5. The display will say accepted at the bottom and then go back to a ready state.

Brother 8480 and 8890 replace fuser message photo

• Make sure that the AC cord is disconnected from the machine.
 • Make sure that the Drum/toner ASSY is removed.
• Make sure that the Paper is removed from the Paper tray.
1. Open the Back cover.

Brother 8480 and 8890 back cover removal photo

2. Remove the Arms of the Back cover from the Pins.
3. Remove the Pins of the Outer chute ASSY from the Back cover.
4) Remove the Back cover.

Brother 8480 and 8890 outer chute removal photo
5. Hold the Knobs on the Rear chute ASSY and pull down this to your side.
6. Remove the Arms of the Rear chute ASSY from the Pins.
7. Remove the Rear chute ASSY.

Brother 8480 and 8890 rear chute removal photo
8. Remove the pan B M4x20 Taptite screw. Release the Hooks in the order of 8a, 8b and 8c. Remove the FU harness cover 1.

Brother 8480 and 8890 FU harness removal photo
9. Disconnect the connector of the Heater terminal while pressing the Hook of the connector of the Fuser unit.

Brother 8480 and 8890 Fuser AC power Connector photo
10. Pull the FU harness cover 2 to the direction of 10a while pressing the Hook and pull out the FU harness cover 2 from the back of the machine.

Brother 8480 and 8890 FU harness cover 2 removal photo
11. Disconnect the connectors of the Thermistor ASSY M and Thermistor ASSY S from the Relay rear PCB ASSY, and remove the harnesses of these thermistors.

Brother 8480 and 8890 themistor connectors photo
12. Remove the pan B M4x20 Taptite screw to remove the Fuser unit.

Brother 8480 and 8890 fusing assembly removal photo

• DO NOT subject the fuser unit to strong physical shocks or vibrations.
• DO NOT touch the rollers and the electrodes to prevent damage to the fuser unit In the following figures.
To prevent the deformation of the pressure roller, the fuser unit spare part is shipped with its pressure roller at low nip pressure. Before installing the fuser unit, turn back the levers to the normal position by following instructions below.
(1) Put the fuser unit on a flat, horizontal surface. Pull up each of the black tab (a) on the right side and left side.
(2) Make sure that the black lever (b) is in the position in the illustration below.

Brother 8480 and 8890 pressure roller release instructions photo

Fuser unit Failure
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