Lexmark X644E Service Manual - Page 185

7002-xxx Input tray(s) service check Optional 250-sheet and 500-sheet trays Service tip: Try all the other input paper sources to make sure they are properly feeding paper. For 990 Error Code- Service Tray x, x= displays the number of the tray that has a problem or needs service. FRU 1 Tray x Option system board or compensator assembly or autoconnect cable Action Check the autoconnect cables and connectors for damage. If the cables, connectors, and connections are good, replace the FRUs in the following order: • Autocompensator assembly option • Replace the option. 24x.xx Paper Jam displays, paper jammed over the pass thru sensor (The printer displays the value of x for the paper tray where the error occurs. Example: 241 is a Paper Jam Tray 1) FRU 1 Pass thru sensor and flag assembly 2 Power takeoff shaft and spring, bevel gear, feed roll gear, drive roll assembly, wear plate, drive shaft bearings, and skewed backup roller Action The tray x option system board did not detect a piece of paper actuating the pass thru sensor. Remove any jammed sheets of paper from the printer and check the pass thru sensor and flag for proper operation by running the appropriate Tray Sensor Test from the diagnostics menu. If the test fails, check the sensor for correct installation and the flag for proper operation. Also check the sensor cable to make sure it is correctly connected to the option system board. If incorrect, replace the tray x option pass thru sensor assembly. Check these parts for broken or damaged parts, contamination on the drive rollers or wear plate, and wear or damage to the drive shaft bearings. Check the drive roll assembly and skewed backup roller for signs of wear, slick spots, material buildup, and oil or grease on the rollers. Also check for proper operation of the paper aligning assembly. Repair or replace parts as necessary. Tray x Low displays when tray x is full or has adequate paper in the tray FRU 1 Paper low sensor assembly Paper low sensor flag tray x option system board Action Run the Tray x Sensor Test and check the sensor for proper operation. If incorrect, check the following: • Paper low sensor flag for smooth and correct operation. • Paper low sensor for correct installation on the autocompensator housing. • Paper low sensor cable for signs of cuts, pinched wiring, or other damage especially at connector J26 on the system board. If no problem is found, replace the paper low sensor assembly. If this does not correct the problem, replace the option system board. Diagnostic information 2-147