Causes: After the specified time from rotating the main motor for the developing roller depress/release, the output of the developing home position sensor does not change. Cause: Developing home position sensor defect, Main motor defect, DC controller PCB defect
Remedy: - Check the connector of the developer home position sensor, main motor, DC controller PCB - Replace the developer home position sensor - Replace the main motor - Replace the DC controller PCB
Code: E020
Description: Density sensor abnormality
Causes: Not enough light received upon image density detection. Cause: Soiled density detection sensor, density detection sensor defect, DC controller PCB defect, toner cartridge defect
Remedy: - Check the connector of the DC controller PCB. - Replace ITB unit - Replace DC controller PCB - Replace toner cartridge