Lexmark X644E Service Manual - Page 138

7002-xxx 290.02 Error code service check ADF feed jam. A Note: Before starting this service check, make sure the first scan sensor (A) cable is correctly installed. FRU 1 ADF 2 First scan sensor 3 First scan sensor cable (first scan sensor to CN10 on the MDC card) 4 Motor driver card Action Check for any signs of paper or other debris that might be present in the ADF assembly over the interval sensor but short of the first scan sensor. Remove any media found in the ADF, and retry by running the scanner feed tests. Enter the Diagnostics Menu (turn on MFP while holding 3 and 6), select SCANNER TESTS, and select Feed Tests. If the paper fails to reach the first scan sensor, go to step 2. Enter the Diagnostics Menu (turn on MFP while holding 3 and 6), select SCANNER TESTS, and select Sensor Tests. Check the first scan sensor for correct operation. Note: Check the first scan sensor by manually feeding a sheet of paper through the ADF and checking the sensor for correct operation. If the sensor fails the test, go to step 3. Check to make sure the interval sensor cable is correctly installed at the sensor CN10 on the motor drive card. If the cable is not installed correctly, reinstall the cable. If installed correctly, go to step 4. Turn the power off, and disconnect CN10 on the motor driver card. Measure the voltages in the table below: First scan sensor-reflective type (normally closed) Connector CN10 (motor driver card) CN10-Pin 10 0 V dc CN10-Pin 11 +5 V dc CN10-Pin 12 +5 V dc Note: All voltages are approximate values. If incorrect, replace the motor driver card. If correct, go to step 5. 2-100 Service Manual