Lexmark X644E Service Manual - Page 149

FRU 2 ADF exit sensor flag 3 ADF exit sensor 4 Motor driver card 7002-xxx Action Check the exit sensor flag to make sure it operates freely and does not hang or bind. If the flag does not operate correctly and cannot be made to operate correctly, 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. If the flag operates correctly, go to step 3. Enter the Diagnostics Menu (turn on MFP while holding 3 and 6), select SCANNER TESTS, and select Sensor Tests. Check the ADF exit sensor for correct operation. Note: You can check the ADF exit sensor by moving the exit sensor flag or by manually feeding a sheet of paper through the ADF. If the sensor fails the test, go to step 4. Turn the power off, and disconnect CN9 on the motor driver card. Measure the voltages in the table below: Exit sensor-interrupter type (normally closed) Connector CN9 (motor driver card) CN9-Pin 1 0 V dc CN9-Pin 2 +5 V dc CN9-Pin 3 +5 V dc Note: All voltages are approximate values. If incorrect, replace the motor driver card. If the error persists, 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. Diagnostic information 2-111