How to Replace an Ink Cartridge for a Sharp Adding Machine

1. Remove the paper scroll from the printer. Turn off the power and make sure the print wheel has stopped moving.
2. Slide the printer cover toward the back of the machine to remove it. Lift out the old ribbon and replace it with the new one by facing the black side of the ribbon up. Secure one of the reels to its reel shaft, thread the ribbon around the outside of the metal guides, and secure the other reel to the opposite reel shaft.
3. Tighten any slack ribbon by turning one of the reels.
4. Replace the print cover and reset the paper scroll.