Xerox 1235N Service Guide - Page 57

Fuser jams 1. Is the paper in good condition and appropriate for a laser printer? 2. Is the printer printing within its environmental specifications? Print the Diagnostic Summary Page to determine the printer's environmental conditions. 3. Test the fuser motor using the service test "Motor and clutch tests" on page 69. 4. Does the exit sensor flag properly actuate its sensor? Use the service test "Switch scan test" on page 63 to test the senor. 5. Replace the fuser. 6. Replace the engine controller board. Eject jams 1. Is the paper in good condition and appropriate for a laser printer? Is the paper curling? 2. Is the printer printing within its environmental specifications? Print the Diagnostic Summary Page to determine the printer's environmental conditions. 3. Is the jam caused by a heavy, stiff paper being printed to the face-down tray? In such cases, a lighter grade of paper should be used or face-up mode to the rear output tray should be used. 4. Is the paper excessively curved after passing through the fuser? Try flipping the paper over in the paper tray. 5. Clean all the eject rollers with an a dry, lint-free cloth if debris is visible. 6. Does the exit sensor flag properly actuate its sensor? Test the sensor using the service test "Switch scan test" on page 63. 7. Replace the engine controller board. Jams in the duplex unit 1. Is the duplex unit correctly installed? 2. Clean the rollers inside the duplex unit with an a dry, lint-free cloth if debris is visible. 3. Inspect the duplex unit for foreign objects such as a scrap of paper. 4. Inspect the duplex unit's electrical connector for damage. 5. Does the duplex unit's sensors operate correctly? Test the sensors using the service test "Switch scan test" on page 63. 6. Test the duplex motor using the service test "Motor and clutch tests" on page 69. 7. Replace the duplex unit. 8. Replace the engine controller board. Service Guide 43