Lexmark C720 Service Manual - Page 159

5024-001 Lower Feed Unit Paper Feed Service Check FRU 1 Remove Options 2 Check for Recommended Paper 3 Lower Feed Paper Feed Cassette 4 • Lower Feed Clutch (PKCL) • IOD1 P.W.B. Board 5 Drive Gear Assembly 6 • Paper Feed Roller • Separation Pad Action Ensure the printer works correctly, without the lower feed unit and duplex unit installed. Disconnect or remove. Ensure the lower feed unit cassette is using a recommended paper. Ensure the paper does not contain excessive humidity. Ensure the paper cassette (Tray2) is not damaged and the paper stop is set to the proper position. Replace any damaged parts. Ensure the paper feed clutch (PKCL) activates and turn the paper feed roller If the paper feed clutch fails to activate, ensure it is connected properly and the lower feed unit is properly installed. Replace the paper feed clutch if it still fails to activate. If the problem still exists, ensure connector DCN8, on the IOD1 P.W.B. board, is connected. Replace the IOD1 P.W.B. board, if necessary. Check the drive gear assembly for damage and replace, if necessary. Inspect the paper feed roller and the separation pad for wear or damage and replace, if necessary. Diagnostic Information 2-79