AS-4000 User’s Guide Maintenance Cleaning procedure A Open the cover of the color measurement unit. B Clean both of the rollers. If paper dust, dirt, glue, and so on, have stuck to the rollers, wipe them off with a woven polyester/nylon knit cloth soaked in the alcohol for cleaning ink. If there is substrate on the roller, lift it slightly and wipe the roller. When cleaning the roller, be careful not to touch the paper presser with your hands or clothes. 73