Canon MF720 Series, Service Manual, Page: 261 / 327

E Code Detail Code Item Description
E014 0001 Title Revolution of the Fixing Motor was out of the specified range
Description After the cycle of the Fixing Motor speed detection signal became the specified cycle once, it
deviated from the specified cycle.
Remedy 1. Check the connector between the ITB Motor and the DC Controller PCB.
2. Replace the ITB Motor.
3. Replace the DC Controller PCB.
E015 0001 Title Error in Developing Disengagement Motor
Description Change in signal status of the Developing Home Position Sensor could not be detected al-
though a specified period of time has passed after rotating the Main Motor for engagement/
disengagement operation of the Developing Cylinder.
Remedy 1. Check the connectors connecting the Developing Home Position Sensor, Main Motor
and the DC Controller PCB.
2. Replace the Developing Home Position Sensor.
3. Replace the Main Motor.
4. Replace the DC Controller PCB.
E020 0000 Title Density Sensor error
Description Sufficient amount of light could not be received when detecting image density.
Remedy 1. Check the connector of the DC Controller PCB.
2. Replace the ITB Unit.
3. Replace the DC Controller PCB.
4. Replace the Toner Cartridge.
E021 1003 Title Developing Motor error
Description The Developing Motor failed to rotate.
Remedy 1. Check the connector between the Developing Motor and the DC Controller PCB.
2. Replace the Developing Motor.
3. Replace the DC Controller PCB.
E021 2003 Title Developing Motor error
Description The cycle of the Developing Motor speed detection signal did not become the specified cycle
since the Developing Motor started to be driven.
Remedy 1. Check the connector between the Developing Motor and the DC Controller PCB.
2. Replace the Developing Motor.
3. Replace the DC Controller PCB.
E052 0000 Title Duplex Unit detection error
Description Duplex Unit detection error
Remedy 1. Check the connector between the Duplex Unit and the DC Controller PCB.
2. Replace the DC Controller PCB.
E066 0000 Title Environment Sensor error
Description Environment Sensor error
Remedy 1. Check the connector between the Environment Sensor and DC Controller PCB.
2. Replace the Environment Sensor.
3. Replace the DC Controller PCB.
E070 0000 Title ITB/TOP Sensor error
Description ITB/TOP Sensor error
Remedy 1. Check the connector between the ITB Unit and DC Controller PCB.
2. Replace the ITB Unit.
3. Replace the DC Controller PCB.
E078 0000 Title Primary transfer disengagement error
Description Primary transfer disengagement mechanism did not work properly.
Remedy 1. Check the disengagement mechanism.
2. Check the connectors of the ITB Tension Sensor, Developing Motor, and DC Controller
PCB.
3. Replace the ITB Tension Sensor.
4. Replace the Developing Motor / DC Controller PCB.
E100 0000 Title Error in Laser Scanner Motor or Laser Scanner Unit (Y)
Description Error in the BD detection value in the Laser Scanner Motor or the Laser Scanner Unit (Y)
Remedy 1. Check the connector between the Laser Scanner Unit and the DC Controller PCB.
2. Replace the Laser Scanner Unit.
3. Replace the DC Controller PCB.
E100 0001 Title Error in Laser Scanner Motor or Laser Scanner Unit (Y)
7. Error/Jam/Alarm
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