SC No.  Level  Error Name/Error Condition/Major Cause/Solution 
1.  Reconnect the harness of the CIS. 
2.  Replace the following parts. 
  Replace the CIS 
  Replace the MPU. 
  Replace the harness of the CIS. 
 
SC No.  Level  Error Name/Error Condition/Major Cause/Solution 
120-00  B  Scanner home position error 1 
  The scanner home position sensor does not go OFF even if 
the scanner moves 30 mm at homing. 
  The scanner home position sensor does not go OFF even if 
the scanner moves 13 mm at the white balance adjustment. 
  The scanner home position sensor goes ON before the 
scanner reaches the specified position (in the sensor OFF 
area) at returning from the scanning position. 
  This SC is issued only when the error signal of the scanner 
HP sensor is detected three times consecutively to prevent 
the sensor detection error due to some noise. 
   
  Motor driver defective 
  Motor defective 
  Scanner HP sensor defective 
  Harness defective 
  Timing belt, pulley, wire, or carriage not installed correctly 
1.  Perform the following operations. 
  Check the harness. 
  Check the timing belt, pulley, wire, or carriage 
installation. 
2.  Replace the following parts. 
  Replace the scanner motor. 
  Replace the scanner HP sensor.