Lexmark X644E Service Manual - Page 137

7002-xxx FRU 6 ADF feed motor 7 Scan motor belt 8 Interval sensor-electrical checks Action Check the ADF feed motor for proper operation. Turn the power off, disconnect CN2 on the motor driver card, and measure the voltages on CN2. ADF feed motor Connector CN2 (motor driver card) Pin number Static CN2-Pin 1 +1.5 V dc CN2-Pin 2 +1.5 V dc CN2-Pin 3 +1.5 V dc CN2-Pin 4 +1.5 V dc CN2-Pin 5 +1.5 V dc CN2-Pin 6 +1.5 V dc Note: All voltages are approximate values. Operating +24 V dc +24 V dc +24 V dc +24 V dc +24 V dc +24 V dc If the voltages are incorrect, replace the motor driver card. If incorrect, turn the power off, reconnect the motor cable to CN2, and measure the voltages on the scan motor connector. If incorrect, replace the scan motor. If correct, go to step 7. Check the scan motor drive belt for any signs of wear or damage or the belt off the gear. If the belt is off the gear, reinstall. If the belt is worn or damaged, replace the belt. If no problem is found replace the complete ADF assembly. See "ADF complete assembly removal" on page 4-15. Note: Whenever the complete ADF assembly is replaced, it is necessary to perform scanner registration. See "Scanner registration" on page 4-4. Turn the power off and reconnect CN10 to the motor driver card. Measure the voltages in the table below with the sensor in normal operation (sensor closed) and with the sensor open (paper over the sensor). Interval sensor-reflective type (normally closed) Connector CN10 (motor driver card) Pin number Sensor closed (uncovered Sensor open (covered) CN10-Pin 7 0 V dc 0 V dc CN10-Pin 8 +0.03 V dc +5.0 V dc CN10-Pin 9 +5.0 V dc +5.0 V dc Note: All voltages are approximate values. If the voltages are incorrect replace the interval sensor. If this does not fix the problem, replace the complete ADF assembly. Note: Whenever the complete ADF assembly is replaced, it is necessary to perform scanner registration. See "Scanner registration" on page 4-4. Diagnostic information 2-99