• Code: E020-xx24
• Description: Concerning the first two digits of the details code in xx12 to xxD0 xx=01: Y xx=02: M xx=03: C xx=04: Bk
  SALT sensor trouble or a broken/disconnected wire. There is trouble in the drum unit.
• Remedy: Replace the SALT sensor (clean it). Check the drum unit connections. Replace the drum unit.

• Code: E020-xx25
• Description: Concerning the first two digits of the details code in xx12 to xxD0 xx=01: Y xx=02: M xx=03: C xx=04: Bk
  SALT sensor trouble or a broken/disconnected wire. There is trouble in the drum unit. Deterioration in ITB.
• Remedy: Replace the SALT sensor (clean the sensor window). Replace the drum unit (check its connections). Replace the ITB (clean it).

• Code: E020-xx30
• Description: Concerning the first two digits of the details code in xx12 to xxD0 xx=01: Y xx=02: M xx=03: C xx=04: Bk
  ATR sensor trouble or a broken/disconnected wire. Incorrect setting of ATR sensor operation values. The drum unit is not installed properly or there is trouble in the unit.
• Remedy: Replace the drum unit (check its connections).

• Code: E020-xx34
• Description: Concerning the first two digits of the details code in xx12 to xxD0 xx=01: Y xx=02: M xx=03: C xx=04: Bk
  Sample images drawn by ATR control are not created. SALT sensor trouble or a broken/disconnected wire. There is trouble in the drum unit. Deterioration in ITB.
• Remedy: Replace the SALT sensor (clean the sensor window). Replace the drum unit (check its connections). Replace the ITB (clean it).

• Code: E020-xx35
• Description: Concerning the first two digits of the details code in xx12 to xxD0 xx=01: Y xx=02: M xx=03: C xx=04: Bk
  SALT sensor trouble or a broken/disconnected wire
• Remedy: Replace the SALT sensor (clean it).

• Code: E020-xx40
• Description: Concerning the first two digits of the details code in xx12 to xxD0 xx=01: Y xx=02: M xx=03: C xx=04: Bk
  Incorrect setting of ATR sensor operation values. ATR sensor trouble or a broken/disconnected wire. The drum unit is not installed properly (the copier cannot detect the drum unit) or there is trouble in the unit.
• Remedy: Replace the SALT sensor (clean it). Replace the drum unit (check its connections).

• Code: E020-xx50
• Description: Concerning the first two digits of the details code in xx12 to xxD0 xx=01: Y xx=02: M xx=03: C xx=04: Bk
  Incorrect developer density operation value which was set when the new drum unit was installed
• Remedy: Replace the drum unit (check its connections).

• Code: E020-xx60
• Description: Concerning the first two digits of the details code in xx12 to xxD0 xx=01: Y xx=02: M xx=03: C xx=04: Bk
  Incorrect developer density target value which was set when the new drum unit was installed (value is extremely low)
• Remedy: Replace the drum unit (check its connections).