• Code: E012-0105
• Description: Failure in Y Drum Motor Control
  Unstable rotation of the Y Drum Motor
• Remedy: 1. Check if the Drum is installed. 2. Take out the drum encoder sensor (UN31, UN32) to clean the Sensor and the Wheel. 3. Remove the Process Unit and then install (reinstall) the Process Unit. 4. Replace the Drum Unit. 5. Replace the Drum Driver PCB (UN4).

• Code: E012-0106
• Description: Failure in rotation of Y Drum Motor
  The Y Drum Motor is not rotating at the specified speed/is stopped.
• Remedy: 1. Check connection of the connector with the Y Drum Motor (M1). 2. Check connection of the connector with Drum Driver PCB (UN4). 3. Check the ITB (to see if the ITB is displaced/damaged. Refer to E075 if the ITB is displaced). 4. Replace the ITB Cleaning Blade. 5. Replace the Drum Driver PCB (UN4).

• Code: E012-0201
• Description: M Drum Encoder 1 and 2 signal error
  M Drum Encoder 1 and 2 signal error (It was detected that the motor was rotating, but not the encoders.)
• Remedy: 1. Check connection of drum encoder sensor 1 and 2 (UN33, UN34). 2. Check that the drum encoder sensor Wheel is properly installed. 3. Check connection of the Drum Driver PCB (UN4). 4. Manually turn the Rotor of the Drum Motor counterclockwise and check that the drum encoder sensor Wheel rotates. -> If the wheel does not rotate, replace the Drum Drive Unit. 5. Take out the drum encoder sensor to clean the Sensor and the Wheel. 6. Replace the drum encoder sensor. 7. Replace the Drum Driver PCB (UN4).

• Code: E012-0202
• Description: Faulty signal with M drum encoder sensor 1
  The signal was not detected for 100 msec or more.
• Remedy: 1. Check connection of drum encoder sensor 1. 2. Take out drum encoder sensor 1 (UN33) to clean the Sensor. 3. Replace drum encoder sensor 1. 4. Check if the harness of the drum encoder sensor is faulty (replace the harness if it’s disconnected). 5. Replace the Drum Driver PCB (UN4).

• Code: E012-0203
• Description: Faulty signal with M drum encoder sensor 2
  The signal was not detected for 100 msec or more.
• Remedy: 1. Check connection of drum encoder sensor 2 (UN34). 2. Take out drum encoder sensor 2 to clean the Sensor. 3. Replace drum encoder sensor 2. 4. Check if the harness of the drum encoder sensor is faulty (replace the harness if it’s disconnected). 5. Replace the Drum Driver PCB (UN4).

• Code: E012-0204
• Description: Failure in M drum encoder sensor Wheel
  Failure is detected with the M drum encoder sensor Wheel
• Remedy: 1. Take out the drum encoder sensor to clean the Sensor (UN33, UN34) and the Wheel. 2. Replace the drum encoder sensor Wheel. 3. Replace the drum encoder sensor. 4. Replace the Drum Driver PCB (UN4).

• Code: E012-0205
• Description: Failure in M Drum Motor Control
  Unstable rotation of the M Drum Motor
• Remedy: 1. Check if the Drum is installed. 2. Take out the drum encoder sensor (UN33, UN34) to clean the Sensor and the Wheel. 3. Remove the Process Unit and then install (reinstall) the Process Unit. 4. Replace the Drum Unit. 5. Replace the Drum Driver PCB (UN4).

• Code: E012-0206
• Description: Failure in rotation of M Drum Motor
  The M Drum Motor is not rotating at the specified speed/ is stopped.
• Remedy: 1. Check connection of the connector with the M Drum Motor (M2). 2. Check connection of the connector with Drum Driver PCB (UN4). 3. Check the ITB (to see if the ITB is displaced/damaged. Refer to E075 if the ITB is displaced). 4. Replace the ITB Cleaning Blade. 5. Replace the Drum Driver PCB (UN4).