Lexmark X644E Service Manual - Page 177
Fuser narrow media sensor service check, Fuser exit and fuser narrow media sensor status check
UPC - 734646093156
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7002-xxx Fuser narrow media sensor service check If any of the following error codes are displayed, a problem may exist in the area of the narrow media sensor assembly: 201.04, 201.14, 201.24, 201.34, 201.44, 201.54, and 201.94. Fuser exit and fuser narrow media sensor status check Printer not printing- no media over sensors Exit sensor open Narrow media sensor open Printer printing-media over sensor(s), non-narrow media fed through the printer Printer printing-narrow media fed through the printer Exit sensor closed Narrow media sensor closed Exit sensor closed Narrow media sensor open FRU 1 Fuser narrow media sensor (sensor test) 2 Fuser narrow media sensor cable 3 Fuser narrow media sensor flag 4 Fuser assembly Fuser narrow media sensor cable Fuser board Fuser to system board cable System board 5 Action Enter the Diagnostics mode, select BASE SENSOR TEST, and select the NM Sensor to test it for proper operation. If the narrow media sensor fails the test, go to step 2; if the narrow media sensor does not pass the test, go to step 5. Check the fuser narrow media sensor cable for correct installation or any signs of damage to the cable or to the connectors. If no problem is found, go to step 3;. If a problem with the installation is found, install the cable correctly. If damage to the cable or the connectors is found, replace the cable. Make sure the sensor flag is not binding and is operating properly. If the sensor is operating properly, go to step 4. If the sensor is not operation properly, repair or replace the sensor assembly. See "Fuser narrow media sensor removal" on page 4-88. Check the continuity of the fuser narrow media sensor cable. If incorrect, replace the cable; if correct, check the continuity of the fuser to system board cable. If incorrect, replace the cable; if correct, replace the following FRUs in the order shown: • Fuser board • Fuser assembly. See "Fuser assembly removal" on page 4-79. • System board. See "System board and inner shield removal -models X644e/X646e" on page 4-131. With the redrive assembly removed from the printer, enter Diagnostics mode and run the printer test from tray 1 and observe the media as it passes over the exit sensor. Check to see that the sensor flag is operating correctly. If the sensor flag and hardware are operating incorrectly, repair or replace the failing sensor assembly. If no problem is found, check the fuser for any signs of media in the fuser or any signs of toner or other contamination. If a problem is found, clean or remove the debris or contamination. Diagnostic information 2-139