Lexmark C720 Service Manual - Page 157

5024-001 Paper Feed Service Checks Printer Paper Feed Service Check FRU Action 1 Check for Recommended Paper Ensure paper being used is a recommended. Ensure paper does not contain humidity. 2 • Paper Stop • Paper Cassette Note: Disconnect the lower feed unit and the duplex unit, if installed, to help isolate a paper transport problem. See "Lower Feed Unit Theory of Operation" on page 1-48 and "" on page 1-50, for more information. Ensure the paper cassette (Tray 1) is not damaged and the paper stop is set to the proper position. Check for paper caught behind the cassette, in the pickup transport roll. Replace any damaged parts. 3 • Paper Feed Roller • Separator Pad Check the paper feed roller and the separator pad for wear or damage. Replace any damaged parts. 4 • Registration Roller Check the registration roller for damage or • Transfer Roll binds, and replace, if necessary. • Paper Discharge Unit • Transfer Unit Check the transfer roll and paper discharge unit assembly for damage and replace, if necessary. 5 Transfer Drum If there is any additional damage to the transfer unit replace it. Ensure the transfer drum is not damaged and is free of foreign material. Note: Do not touch the transfer drum, with your hands, as oil may be left on the drum surface. Diagnostic Information 2-77