The ink cartridge needs to be replaced if the printed text becomes scratchy or faint even if you have cleaned the ink jet nozzles. Replace the ink cartridge according to the following procedure below.

• The ink disposal tank must be replaced when the ink cartridge is replaced.
• To replace the ink cartridge, turn the scanner OFF before removing the Top Cover. After the ink cartridge is set, replace the Top Cover, and then turn the scanner back ON.

• Use a Canon ink cartridge (PG-40 or PG-50).
• Do not use more than one cartridge by rotation. If you do so, applications cannot check the ink level precisely.

1. Remove the Top Cover.
   
   
   
   
2. Squeeze the Print Position Adjustment Lever, and lift it up to the top position.
   
   
   
   
3. Push the ink cartridge backward, and then remove the ink cartridge.
   
   
   
   Do not touch the ink jet nozzle right after imprinting. The nozzle may be very hot.
   
   
   
4. Set the ink cartridge.
   
   
   
5. Carefully replace the Top Cover.