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C7350/7550 User’s Guide: Maintenance • 484
Changing the Toner Cartridge
When the toner is running low, ***** TONER LOW is displayed in
the control panel (*** is the color name).
If printing continues without replacing the toner cartridge, CHANGE
***** TONER is displayed and printing is cancelled. Depending on
the operating environment, print may become faint before this
message is displayed.
At this stage, remove the toner cartridge and check whether it is
empty. If so, the toner cartridge needs to be replaced.
Cartridge life is approximately 10,000 letter-size pages at 5% print
density. The first toner cartridge installed in a new image drum
needs to be replaced after less than this amount because the toner
cartridge has to fill a new image drum.
NOTE
After installing the new toner cartridge, the message on
the display TONER LOW or CHANGE TONER should
disappear. However, this sometimes does not disappear
until printing has been carried out. If it still does not
disappear, reinstall the toner cartridge.
WARNING!
Take extreme care when handling toner.
• Toner can be harmful if inhaled, swallowed or if it
gets in the eyes.
• Toner can also stain hands and clothing.
See the Material Safety Data Sheets in your Warranty,
Regulatory and Safety Information booklet for more
information.