Lexmark X644E Service Manual - Page 142

7002-xxx 291.00 Error code service check Static jam-second scan sensor (A). A Note: Before starting this service check, make sure the second scan sensor cable is correctly installed. FRU 1 ADF 2 Second scan sensor 3 Second scan sensor cable (second scan sensor to CN9 on the MDC card) 4 Motor driver card Action The media is jammed or stuck in the ADF at the second scan sensor. Check for any signs of paper or other debris that might be present or jammed in the ADF assembly around the second scan sensor. Enter the Diagnostics Menu (turn on MFP while holding 3 and 6), select SCANNER TESTS, and select Sensor Tests. Check the second scan sensor for correct operation. Note: To manually activate the sensor, you can either open the jam removal tray (it is necessary to defeat the jam tray sensor by placing a piece of paper in the sensor to turn off the jam tray message on the display), or you can manually feed a piece of paper through the ADF. If the sensor fails the test, go to step 3. Check to make sure the first scan cable is correctly installed at the sensor CN9 on the SCC (scanner control card in the ADF). If the cable is not installed correctly, reinstall the cable. If installed correctly, go to step 4. Turn the power off, and disconnect CN9 on the motor driver card. Measure the voltages in the table below: First scan sensor-reflective type (normally closed) Connector CN9 (motor driver card) CN9-Pin 4 0 V dc CN9-Pin 5 CN9-Pin 6 +5 V dc +5 V dc Note: All voltages are approximate values. If incorrect, replace the motor driver card. If correct, go to step 5. 2-104 Service Manual