Hi Garry,
Welcome to The Canon Forums!
Please try some the suggestion below to try to resolve the issue.
Try a different pack or type of paper.
Use a geniune toner cartridge.
Clean the Interior of the printer:
1. Turn OFF the machine and disconnect all the cables from the machine.
2. Remove any documents from the platen glass or feeder.
3. Lift the scanning platform, open the toner cover, and then remove the toner cartridge.
4. Remove any toner or paper debris from the interior of the machine, with a soft, dry cloth that is clean and lint-free.
5. Insert the toner cartridge.
6. Close the toner cover, and then lower the scanning platform.
7. Reconnect all the cables, and then turn ON the power.
*Do not touch the fixing unit. Touching the fixing unit may cause burns as it becomes very hot during use.
Clean the Fixing Unit:
1. Press (Menu).
2. Press [▲] or [▼] to highlight <Adjustment/Maintenance>, and then press [OK].
3. Press [▲] or [▼] to highlight <Clean Fixing Unit>, and then press [OK].
4. Load Letter size plain paper in the multi-purpose tray, and then press [OK].
• The cleaning process begins. Cleaning takes approximately 90 seconds.
5. When the cleaning is complete, press [ ] (Menu) to close the screen.
Clean the Feeder:
1. Turn OFF the machine and disconnect all the cables from the machine.
2. Remove any documents from the feeder.
3. Open the feeder cover, clean the rollers with a well wrung-out cloth dampened with water, and then wipe them with a soft and dry cloth.
*When cleaning the machine, do not use tissue paper, paper towels, or similar materials for cleaning. They can generate static electricity.
4. Close the feeder cover.
5. Reconnect all the cables, and then turn ON the power.
Reset Toner Cartridges:
1. Lift the scanning platform, open the toner cover, and then remove the toner cartridge.
2. Gently shake the toner cartridge 5-6 times to evenly distribute the toner.
3. Insert the toner cartridge.
4. Close the toner cover, and then lower the scanning platform.
If the issue continues, the printer will require service. Please contact our US-based technical support team at 1-800-OK-CANON (1-800-652-2666) weekdays between 10 AM and 6:30 PM ET.
Did this answer your question? Please click the Accept as Solution button so that others may find the answer as well.
