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3100 Scanner Carriage Error
The HP sensor won't be opened when it is dri ven in the scan direction for 37.44 mm (*1) at the initial scanning when the HP sensor is cut off.
The HP sensor won't be cut off when it is dri ven in the return direction for 320.44mm (*2) at the initial scanning when the HP sensor is open.
Defective connector cable or poor contact in the connector.
Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable.
Home position sensor and OPWB
Scanner motor and main PWB (YC18)
Defective home position sensor.
Replace the home position sensor.
Defective scanner motor.
Replace the scanner motor.
Defective main PWB.
Replace the main PWB and check for correct operation.