Lexmark X644E Service Manual - Page 141
complete assembly removal on Scanner, registration
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FRU 5 First scan sensor- electrical checks 7002-xxx Action 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). First scan sensor Connector CN10 (motor driver card) Pin number Sensor closed (uncovered) Sensor open (covered) CN10-Pin 7 +0 V dc CN10-Pin 8 +0.03 V dc CN10-Pin 9 +5.0 V dc Note: All voltages are approximate values. 0 V dc +5.0 V dc +5.0 V dc If the voltages are incorrect, replace the first scan sensor. If this does not fix the problem, 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 2-103
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