Lexmark X644E Service Manual - Page 146

7002-xxx 293 Error code service check Paper missing jam. Note: Before starting this service check, make sure the sensor cable is correctly installed. FRU 1 ADF 2 Paper present sensor 3 Paper present cable Motor driver card Action Check the ADF for any media that might be jammed in the ADF. Turn the MFP off and then back on. Feed several sheets of media through the ADF. If the error still occurs, 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 paper present sensor for correct operation by inserting a sheet of paper into the ADF paper tray to activate the paper present sensor. If the sensor does not operate properly, go to step 3. Measure the voltages shown in the table below: Paper present sensor-interrupter type (normally closed) Connector CN10 (motor driver card) Pin number Sensor closed Sensor open CN10-Pin 4 0 V dc 0 V dc CN10-Pin 5 +4.3 V dc +0.25 V dc CN10-Pin 6 +1.6 V dc +1.6 V dc Note: All voltages are approximate values. If the voltages are incorrect, turn the power off, disconnect the cable attached to CN10 on the motor driver card, and measure the voltages in the table below: Paper present sensor-interrupter type (normally closed) Connector CN10 (motor driver card) CN10-Pin 4 0 V dc CN10-Pin 5 +4.3 V dc CN10-Pin 6 +5 V dc Note: All voltages are approximate values. If the voltages are incorrect, replace the motor driver card. If the voltages are correct, 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. 2-108 Service Manual