Canon LBP7210Cdn Manual page 448

Toner Cartridge Replacement Required
The toner cartridge of the indicated color has reached the end of its life.
Cause
Solution Replace the toner cartridge with a new one.
Replacing Toner Cartridges
Check the Toner Cartridges
Cause 1 Any of the toner cartridges are not installed properly.
Solution 1 Install the toner cartridge again.
Replacing Toner Cartridges
Solution 2 Cycle the power of the printer.
Turning the Printer On/Off
Cause 2 Any of the toner cartridges are damaged.
Solution Replace the toner cartridge with a new one.
Replacing Toner Cartridges
Cause 3 Toner cartridges with print quality that cannot be guaranteed due to their decreasing
lifetime etc., or used toner cartridges that have reached their lifetime, may have been
inserted.
Solution Continuing to use these cartridges may cause a malfunction, so replacing these cartridges
with new cartridges is recommended.
Replacing Toner Cartridges
Output Tray Is Full
The output tray is filled with printed paper.
Cause
Solution Remove the paper from the output tray.
Updating Firmware
Cause The firmware is being updated.
Solution Please wait a moment.
Printer Not Ready
Cause The packing material (sheet) is left in the output area.
Solution Turn off the printer once, remove the sheet, and then turn on the printer again.
Carrying the Printer to the Installation Site and Removing the Packing Materials
Insufficient Memory
The memory on the computer or server is insufficient.
Cause
Solution Exit unnecessary applications.
Out of Paper