E051 is the horizonal registration motor problem,a lot of disassembly to get to that, someone needs to take out the cass feed unit assembly. On the motor have a small gear, sometime this gear broken. You need a tech to help with this.
Good luck to you.
SOURCE: Canon IR2800 error 000051-0000
The code referrers to M3 not turning "ON". Make sure the connector ( J3040-2 ) is connected all the way in.... Cheak all of the connections on all the pcb.. Good Luck
SOURCE: error code 000051
From service manual
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 registration home position sensor
b. DC controller PCB (J304) <-> relay connector <-> horizontal registration motor
NO: Connect the connectors.
2. Sensor lever (damage and interference), Sensor
Is abnormal noise heard from the horizontal registration assembly in keeping 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 controller 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.
Usually
E 051 is the horizonal motor problem, you can take out the pick up ***'y. On the motor have a small gear, sometime this gear broken.
Or the horizontal reg motor became stuck in the wrong position. I was able to manually move it back and rebooted copier. Not sure why the motor was in the wrong position-cust related?
Fax Canon B120
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