Lexmark X644E Service Manual - Page 194

7002-xxx Output bin sensor standard tray service check Service tip: If the output bin standard tray fills up and the bin full sensor fails to post the Remove Paper Standard Bin message: 1. Enter the Diagnostics Mode. 2. Select Output Bin Tests. 3. Select Sensor Tests. 4. Select Standard Bin. 5. Check the sensor and flag for proper operation. If you find no problem with the sensor and flag, continue with the service check. Service tip: Be sure the flag is correctly installed. The output bin sensor is a normally closed sensor with the sensor flag down. Therefore, unless the flag is in the up position or out of the sensor slot, a Remove Paper Standard Bin message does not display. FRU 1 System board Printer fails to display Remove Paper Standard Bin message. Output Bin Sensor Test fails. 2 Output bin sensor flag Action Check the voltage at J6-1. It measures +5 V dc when the flag is in the sensor, and 0 V dc when the flag is out of the sensor. If the voltage does not change, replace the sensor cable assembly. If this does not fix the problem, replace the system board. Make sure the correct flag is installed. Check the flag for damage or improper operation. If incorrect, replace the flag. Note: A broken or improper operating sensor flag causes a Remove Paper Standard Bin message to display before POST completes and cannot be cleared. Paper feed service check-printer If you have a 936 Transport Motor Error go to "Main drive assembly removal" on page 4-113. FRU 1 Alignment assembly 2 Inner deflector Action Check to ensure the alignment assembly is correctly attached to the left side frame and the mounting screws are tight. Check the alignment assembly for worn rollers, contaminated rollers, or binds. Replace the alignment assembly if any problem is found. Check the inner paper deflector for correct installation. If the deflector is bowed or not fitting correctly, replace the deflector. 2-156 Service Manual