• Code: E020-0000
• Description: Density Sensor error
• Causes: An error in the Density Sensor was detected.
• Remedy: 1. Check the remaining toner level. 2. Replace the Toner Cartridge. 3. Check the harness/connector between the Color Displacement/Density Sensor and the Engine Controller PCB. 4. Replace the Color Displacement/Density Sensor. 5. Replace the ITB. 6. Replace the Engine Controller PCB.

• Code: E021-1000
• Description: Yellow Developing Motor rotation error
• Causes: It was judged that the Developing Motor did not rotate.
• Remedy: 1. Check the harness/connector between the Developing Motor and the Engine Controller PCB. 2. Replace the Developing Motor. 3. Replace the Driver PCB. 4. Replace the Engine Controller PCB.

• Code: E021-1001
• Description: Magenta Developing Motor rotation error
• Causes: It was judged that the Developing Motor did not rotate.
• Remedy: 1. Check the harness/connector between the Developing Motor and the Engine Controller PCB. 2. Replace the Developing Motor. 3. Replace the Driver PCB. 4. Replace the Engine Controller PCB.

• Code: E021-1002
• Description: Cyan Developing Motor rotation error
• Causes: It was judged that the Developing Motor did not rotate.
• Remedy: 1. Check the harness/connector between the Developing Motor and the Engine Controller PCB. 2. Replace the Developing Motor. 3. Replace the Driver PCB. 4. Replace the Engine Controller PCB.

• Code: E021-1003
• Description: Black Developing Motor rotation error
• Causes: It was judged that the Developing Motor did not rotate.
• Remedy: 1. Check the harness/connector between the Developing Motor and the Engine Controller PCB. 2. Replace the Developing Motor. 3. Replace the Driver PCB. 4. Replace the Engine Controller PCB.

• Code: E021-2000
• Description: Error in startup of the Yellow Developing Motor
• Causes: Revolution of the Developing Motor did not reach the specified value.
• Remedy: 1. Check the harness/connector between the Developing Motor and the Engine Controller PCB. 2. Replace the Developing Motor. 3. Replace the Driver PCB. 4. Replace the Engine Controller PCB.

• Code: E021-2001
• Description: Error in startup of the Magenta Developing Motor
• Causes: Revolution of the Developing Motor did not reach the specified value.
• Remedy: 1. Check the harness/connector between the Developing Motor and the Engine Controller PCB. 2. Replace the Developing Motor. 3. Replace the Driver PCB. 4. Replace the Engine Controller PCB.

• Code: E021-2001
• Description: Error in startup of the Magenta Developing Motor
• Causes: Revolution of the Developing Motor did not reach the specified value.
• Remedy: 1. Check the harness/connector between the Developing Motor and the Engine Controller PCB. 2. Replace the Developing Motor. 3. Replace the Driver PCB. 4. Replace the Engine Controller PCB.