SC Code Descriptions
SM 6-4 D245/D246/D247
SC No. Level Error Name/Error Condition/Major Cause/Solution
121-00 B Scanner home position error 2
 The scanner home position sensor does not go ON even if
the scanner moves 480 mm (from the sensor off area) or 30
mm (from the sensor on position) at homing.
 The scanner home position sensor goes OFF on starting the
DF scanning/Book scanning.
 The scanner home position sensor does not go ON when
the scanner reaches to the specified position (in the sensor
ON area) 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.
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