Nov 102013

Print Unable 6B Message Repair tips and advice for the Brother Models 9440, 9040, 9045, and 9840

The Print Unable 6B Message happens with the center thermistor inside the fusing assembly doesn’t reach 100 c or 212 f in the allotted amount of time. Failure to reach this temp could result in poor fusing and could be a sign of additional problems in the machine. Also, this error could be a result of a dirty thermistor pad. The thermistor rides on the surface of the fusing unit hot roller. If dirt or debris gets build up on the bad then it can read false low temperature readings. In this article find some repair tips for the Print Unable 6B message along with links to manually resetting the fuser error code and a link to remove the fusing assembly if you want to take your troubleshooting to the next level and check out the thermistors or replace the fusing assembly.

Brother 9440, 9040, 9045, 9840 print unable 6B message

Repair Tips for the Print Unable 6B Message

1. Turn the power off then back on. If that fails then turn the power off, unplug the machine, and let it sit 15 to 30 minutes.

2. Check the power source. Make sure the device is plugged straight into a wall outlet. Never plug them into a power strip with other devices and the recommend not being on the same circuit as other heating devices like coffee makers, space heaters, and other laser printers and copiers.

3. Make sure the machine is in a proper environment. If the machine has been sitting out in the cold like in a storage closet or in a vehicle overnight allow several hours for the machine to warm up to room temperature before turning on. The outside of the machine will warm up before the inside so a warm outside doesn’t mean the inside has properly warmed up.

4. Perform manual reset in Maintenance Mode.
Fuser Error Message Manual Reset – Brother 9440, 9450, 9840, 9040, 9045

5. Check the thermistors for dirt build up.  Check connectors and replace the fusing assembly if needed.

6. Replace the Power Supply Board.

6. Replace the Engine Control Board.

Click on the link below for Fuser Removal instructions.
Brother 9440, 9450, 9840, 9040, 9045 Fuser Removal Instructions

Click on the link below for additional buying options and information.
Genuine OEM Brother Fuser Assembly Unit 110V for Color Laser Printer All-in-one DCP-9040CN, DCP-9045CDN HL-4040CDN HL-4040CN HL-4070CDW MFC-9440CN MFC-9450CDN MFC-9840CDW

Brother MFC9130CW Wireless All-In-One Printer with Scanner, Copier and Fax, Amazon Dash Replenishment Enabled

Price: $320.00

3.8 out of 5 stars (960 customer reviews)

31 used & new available from $268.99

BROTHER Wireless Color Laser LED All-In-One Printer, Copier, Scanner, Fax, Mfc-9340Cdw

Price: $399.88

3.7 out of 5 stars (305 customer reviews)

22 used & new available from $399.88

Brother MFC9460CDN Color Photo Printer with Scanner, Copier & Fax

Price: $1,365.99

3.6 out of 5 stars (41 customer reviews)

6 used & new available from $359.99

Brother MFC-9970CDW Color Laser All-in-One with Wireless Networking and Duplex

Price: $2,152.90

3.8 out of 5 stars (385 customer reviews)

5 used & new available from $549.99