Lexmark C520 Service Manual - Page 135

5022-xxx Handing the photoconductor unit The following precautions must be observed when handling the photoconductor unit. The photoconductor unit is a supply item you will have to remove during some of the repair procedures: Transportation/storage Use the specified carton whenever moving or storing the photoconductor unit. Handling • The optical photoconductor roller in the photoconductor unit exhibits the greatest light fatigue after being exposed to strong light over an extended period of time. Never expose it to direct sunlight. Cover the photoconductor unit when you remove it from the printer. • Use care not to contaminate the surface of the optical photoconductor roller with an oil-based solvent, fingerprints, and other foreign matter. • Do not scratch the surface of the optical photoconductor roller. Parts not to be touched Any part where the mounting screws are used to meet a printer alignment set at the factory must not be removed, disassembled, or adjusted. 4-2 Service Manual