K117sm7e2
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7. 3. 1. 9 Check of Document Sensor Front (for New Scanner)
1. Open the Upper Unit when the machine is turned on.
2. Turn off the scanner then turn it on again.
3. Insert a piece of paper under the Document Sensor Front to block the sensor light.
4. It is possible to check whether the Document Sensor Front is working correctly or not by
checking the LED of CIS 1.
Document Sensor Front and concerning harness and Main PCB are working correctly if the
LED of CIS 1 lights in green.
If it does not light, any of Document Sensor Front, harness and Main PCB has any abnormality.
7. 3. 1. 10 Check of Document Sensor Rear (for New Scanner)
1. Open the Upper Unit when the machine is turned on.
2. Turn off the scanner then turn it on again.
3. Insert a piece of paper under the Document Sensor Rear to block the sensor light.
4. It is possible to check whether the Document Sensor Rear is working correctly or not by
checking the LED of CIS 2.
Document Sensor Rear and concerning harness and Main PCB are working correctly if the
LED of CIS 2 lights in green.
If it does not light, any of Document Sensor Rear, harness and Main PCB has any abnormality.
LED of CIS 1 lights in green.
Document Sensor Front
Document Sensor Rear
LED of CIS 2 lights in green.