CHAPTER 6 SELF DIAGNOSIS
6-11
E051
0000
At start-up, home position is not detected when the horizontal registration
assembly is moved 100 mm in the direction of home position.
Main cause
The horizontal home position sensor is faulty. The horizontal registration
motor is faulty. The DC controller PCB is faulty.
Action
1. Connector
Are the connectors of the horizontal registration home position sensor and
the horizontal registration motor connected?
a. DC controller PCB (J304) <-> relay connector <-> horizontal registra-
tion home position sensor
b. DC controller PCB (J304) <-> relay connector <-> horizontal registra-
tion motor
NO:
Connect the connectors.
2. Sensor lever (damage and interference), Sensor
Is abnormal noise heard from the horizontal registration assembly in keep-
ing with the motor rotation?
YES: a. The horizontal registration assembly is out of place because of
damage to the sensor lever. Replace the sensor lever.
b. The horizontal registration assembly malfunctions because of the
presence of foreign matter. Remove the foreign matter.
c. The sensor is faulty and cannot detect home position. Replace the
sensor.
3. Horizontal registration motor, DC controller PCB
Is the horizontal registration motor control signal generated by the DC con-
troller PCB?
J304-1/2: 24 V, J304-3/4/5/6: motor excitation signal
YES: The horizontal registration motor is faulty. Replace the motor.
NO:
Replace the DC controller PCB.
