My experience of this type of printer is minimal. I have two desk calculators and neither have a cleaning programme.
Blotchy or smudged printing could indicate worn mechanism, worn print head or over or under inking. Cleaning the printhead and replacing the ink cartridge might work.
Answers & Comments
My experience of this type of printer is minimal. I have two desk calculators and neither have a cleaning programme.
Blotchy or smudged printing could indicate worn mechanism, worn print head or over or under inking. Cleaning the printhead and replacing the ink cartridge might work.
I suggest you read the manual...
https://www.usa.canon.com/internet/portal/us/home/support/calculators-user-manual