Replacing the Toner Cartridge

The machine displays a message when the amount remaining in the toner cartridge is low. Note that the print quality may suffer if you continue printing without resolving this issue. You can check the amount remaining in the toner cartridges on the display (Checking the Remaining Amount of Consumables).

When a Message Appear

The message that is displayed depends on the amount remaining in the toner cartridges. Depending on which message is displayed, prepare a new toner cartridge (Consumables) or replace the current toner cartridge with a new one (Procedure for Replacing the Toner Cartridge).
<Prepare cartridge.> 
<End of Cartridge Lifetime>

When Printouts are Poor in Quality

If your printouts begin to show any of the following features, one of your toner cartridges is consumed. Replace the nearly empty toner cartridge even if no message is displayed. Procedure for Replacing the Toner Cartridge
Streaks Appear/Printing is Uneven
Partially faded
Uneven density
White Spots Appear
Toner smudges and splatters appear
Blank space of originals becomes grayish in printouts

Procedure for Replacing the Toner Cartridge

When you replace the toner cartridge, simple instructions on the replacement procedure are displayed on the screen. See the on-screen instructions as well as the following procedure.
Open the front cover.
MF735Cx / MF734Cdw / MF732Cdw
MF635Cx / MF633Cdw / MF631Cn
Pull out the cartridge tray.
Pull the target toner cartridge straight up and out of the machine.
Remove the replacement toner cartridge from the packing material.
Pull the tab of the packing material on a flat place.
Pull out the toner cartridge.
Shake the toner cartridge 5 or 6 times as shown below to evenly distribute the toner inside the cartridge.
Do not touch the surface of the drum on the bottom of the toner cartridge.
Install the toner cartridge.
Each toner cartridge color has its own slot in the toner cartridge tray, and this tray is indicated with a corresponding color label (). Place the toner cartridge into the slot that corresponds to its color.
The bottom surface of the toner cartridge is exposed; therefore, be careful not to bump the toner cartridge against the slot frame when inserting it into the slot.
Push the toner cartridge tray back in, and close the front cover.
Immediately after the front cover is closed, the quick adjustment (Quick Adjust) starts. To perform adjustment for higher quality, perform full adjustment (Full Adjust).