• Code: E020-1050
• Description: Abnormal Y color patch reading value
  Dark patch although setting 0 for the patch level
• Remedy: 1. Clean the scanner’s window. 2. Use your hand to check if the shutter of the Registration Patch Sensor Unit can be open. 3. Check if the window of the Patch Sensor (UN43/ UN44) is soiled. 4. Check scar on the ITB. 5. Check movement of the Registration Shutter Solenoid (SL02). COPIER > FUNCTION > PART-CHK > SL to move SL02 6. Check the harness/connector between the DC Controller PCB (UN09/J12) and the Patch Sensors (UN43/J4007, UN44, J4006). 7.Replace the Drum Unit (Y) 8.Replace the Registration Patch Sensor Unit 9 Replace the ITB Unit. 10. Check conduction of the fuses (FU5, FU8) in the DC Controller PCB (UN09). 11. Replace the Primary Transfer High Voltage PCB (UN04) 12. Replace the Developing High Voltage PCB (UN07) 13. Replace the Primary Charging High Voltage PCB (UN06) 14. Replace the Auxiliary High Voltage PCB (UN08) 15. Replace the Replace the DC Controller PCB (UN09)

• Code: E020-1060
• Description: Abnormal Y color patch reading value
  Light patch although setting 7 for patch level
• Remedy: 1. Check the patch shape. 2. Clean the high voltage contact point with dry wiping or air blower. 3. Check the harness/connector between the DC Controller (UN09) and the High Voltage PCB. Between the DC Controller PCB (UN09/ J21) and the Primary Charging High Voltage PCB (UN06/ J441, J442) Between the DC Controller PCB (UN09/ J21, J22) and the Developing High Voltage PCB (UN07/ J451, J452) Between the DC Controller PCB (UN09/ J19) and the Auxiliary High Voltage PCB (UN08/J461, J462) Between the DC Controller PCB (J205) and the Primary Transfer High Voltage PCB (UN04/J1001) 4. Replace the Drum Unit (Y) 5. Replace the Registration Patch Sensor Unit 6. Replace the ITB Unit. 7. Check conduction of the fuses (FU5, FU8) in the DC Controller PCB (UN09). 8. Replace the Primary Transfer High Voltage PCB (UN04) 9. Replace the Developing High Voltage PCB (UN07) 10. Replace the Primary Charging High Voltage PCB (UN06) 11. Replace the Auxiliary High Voltage PCB (UN08) 12. Replace the DC Controller PCB (UN09)

• Code: E020-1150
• Description: Abnormal M color patch reading value
  Dark patch although setting 0 for the patch level
• Remedy: 1. Clean the scanner’s window. 2. Use your hand to check if the shutter of the Registration Patch Sensor Unit can be open. 3. Check if the window of the Patch Sensor (UN43/ UN44) is soiled. 4. Check scar on the ITB. 5. Check movement of the Registration Shutter Solenoid (SL02). COPIER > FUNCTION > PART-CHK > SL to move SL02 6. Check the harness/connector between the DC Controller PCB (UN09/J12) and the Patch Sensors (UN43/J4007, UN44, J4006). 7.Replace the Drum Unit (M) 8.Replace the Registration Patch Sensor Unit 9 Replace the ITB Unit. 10. Check conduction of the fuses (FU5, FU8) in the DC Controller PCB (UN09). 11. Replace the Primary Transfer High Voltage PCB (UN04) 12. Replace the Developing High Voltage PCB (UN07) 13. Replace the Primary Charging High Voltage PCB (UN06) 14. Replace the Auxiliary High Voltage PCB (UN08) 15. Replace the Replace the DC Controller PCB (UN09)

• Code: E020-1160
• Description: Abnormal M color patch reading value
  Light patch although setting 7 for patch level (unable to fit in the target between 550 and 640)
• Remedy: 1. Check the patch shape. 2. Clean the high voltage contact point with dry wiping or air blower. 3. Check the harness/connector between the DC Controller (UN09) and the High Voltage PCB. Between the DC Controller PCB (UN09/ J21) and the Primary Charging High Voltage PCB (UN06/ J441, J442) Between the DC Controller PCB (UN09/ J21, J22) and the Developing High Voltage PCB (UN07/ J451, J452) Between the DC Controller PCB (UN09/ J19) and the Auxiliary High Voltage PCB (UN08/J461, J462) Between the DC Controller PCB (J205) and the Primary Transfer High Voltage PCB (UN04/J1001) 4. Replace the Drum Unit (M) 5. Replace the Registration Patch Sensor Unit 6. Replace the ITB Unit. 7. Check conduction of the fuses (FU5, FU8) in the DC Controller PCB (UN09). 8. Replace the Primary Transfer High Voltage PCB (UN04) 9. Replace the Developing High Voltage PCB (UN07) 10. Replace the Primary Charging High Voltage PCB (UN06) 11. Replace the Auxiliary High Voltage PCB (UN08) 12. Replace the DC Controller PCB (UN09)

• Code: E020-1250
• Description: Abnormal C color patch reading value
  Dark patch although setting 0 for the patch level
• Remedy: 1. Clean the scanner’s window. 2. Use your hand to check if the shutter of the Registration Patch Sensor Unit can be open. 3. Check if the window of the Patch Sensor (UN43/ UN44) is soiled. 4. Check scar on the ITB. 5. Check movement of the Registration Shutter Solenoid (SL02). COPIER > FUNCTION > PART-CHK > SL to move SL02 6. Check the harness/connector between the DC Controller PCB (UN09/J12) and the Patch Sensors (UN43/J4007, UN44, J4006). 7.Replace the Drum Unit (C) 8.Replace the Registration Patch Sensor Unit 9 Replace the ITB Unit. 10. Check conduction of the fuses (FU5, FU8) in the DC Controller PCB (UN09). 11. Replace the Primary Transfer High Voltage PCB (UN04) 12. Replace the Developing High Voltage PCB (UN07) 13. Replace the Primary Charging High Voltage PCB (UN06) 14. Replace the Auxiliary High Voltage PCB (UN08) 15. Replace the Replace the DC Controller PCB (UN09)

• Code: E020-1260
• Description: Abnormal C color patch reading value
  Light patch although setting 7 for patch level (unable to fit in the target between 550 and 640)
• Remedy: 1. Check the patch shape. 2. Clean the high voltage contact point with dry wiping or air blower. 3. Check the harness/connector between the DC Controller (UN09) and the High Voltage PCB. Between the DC Controller PCB (UN09/ J21) and the Primary Charging High Voltage PCB (UN06/ J441, J442) Between the DC Controller PCB (UN09/ J21, J22) and the Developing High Voltage PCB (UN07/ J451, J452) Between the DC Controller PCB (UN09/ J19) and the Auxiliary High Voltage PCB (UN08/J461, J462) Between the DC Controller PCB (J205) and the Primary Transfer High Voltage PCB (UN04/J1001) 4. Replace the Drum Unit (C) 5. Replace the Registration Patch Sensor Unit 6. Replace the ITB Unit. 7. Check conduction of the fuses (FU5, FU8) in the DC Controller PCB (UN09). 8. Replace the Primary Transfer High Voltage PCB (UN04) 9. Replace the Developing High Voltage PCB (UN07) 10. Replace the Primary Charging High Voltage PCB (UN06) 11. Replace the Auxiliary High Voltage PCB (UN08) 12. Replace the DC Controller PCB (UN09)

• Code: E020-1350
• Description: Abnormal Bk color patch reading value
  Dark patch although setting 0 for the patch level
• Remedy: 1. Clean the scanner’s window. 2. Use your hand to check if the shutter of the Registration Patch Sensor Unit can be open. 3. Check if the window of the Patch Sensor (UN43/ UN44) is soiled. 4. Check scar on the ITB. 5. Check movement of the Registration Shutter Solenoid (SL02). COPIER > FUNCTION > PART-CHK > SL to move SL02 6. Check the harness/connector between the DC Controller PCB (UN09/J12) and the Patch Sensors (UN43/J4007, UN44, J4006). 7.Replace the Drum Unit (Bk) 8.Replace the Registration Patch Sensor Unit 9 Replace the ITB Unit. 10. Check conduction of the fuses (FU5, FU8) in the DC Controller PCB (UN09). 11. Replace the Primary Transfer High Voltage PCB (UN04) 12. Replace the Developing High Voltage PCB (UN07) 13. Replace the Primary Charging High Voltage PCB (UN06) 14. Replace the Auxiliary High Voltage PCB (UN08) 15. Replace the Replace the DC Controller PCB (UN09)

• Code: E020-1360
• Description: Abnormal Bk color patch reading value
  Light patch although setting 7 for patch level
• Remedy: 1. Check the patch shape. 2. Clean the high voltage contact point with dry wiping or air blower. 3. Check the harness/connector between the DC Controller (UN09) and the High Voltage PCB. Between the DC Controller PCB (UN09/ J21) and the Primary Charging High Voltage PCB (UN06/ J441, J442) Between the DC Controller PCB (UN09/ J21, J22) and the Developing High Voltage PCB (UN07/ J451, J452) Between the DC Controller PCB (UN09/ J19) and the Auxiliary High Voltage PCB (UN08/J461, J462) Between the DC Controller PCB (J205) and the Primary Transfer High Voltage PCB (UN04/J1001) 4. Replace the Drum Unit (Bk) 5. Replace the Registration Patch Sensor Unit 6. Replace the ITB Unit. 7. Check conduction of the fuses (FU5, FU8) in the DC Controller PCB (UN09). 8. Replace the Primary Transfer High Voltage PCB (UN04) 9. Replace the Developing High Voltage PCB (UN07) 10. Replace the Primary Charging High Voltage PCB (UN06) 11. Replace the Auxiliary High Voltage PCB (UN08) 12. Replace the DC Controller PCB (UN09)