• Code: E020-XX10
• Description: Drum/Developer-related error XX=01:Y XX=02:M XX=03:C XX=04:K XX=00:Any color
  In INIT control of the initial setting, SGNL is less than 62.
• Remedy: Clean the ATR sensor window, Check on attachment of the developing unit, Check on a break in the ATR sensor, Replace the ATR sensor

• Code: E020-XX11
• Description: Drum/Developer-related error XX=01:Y XX=02:M XX=03:C XX=04:K XX=00:Any color
  In INIT control of the initial setting, REF is less than 62.
• Remedy: Check on a break in the ATR sensor, Replace the ATR sensor

• Code: E020-XX12
• Description: Drum/Developer-related error XX=01:Y XX=02:M XX=03:C XX=04:K XX=00:Any color
  In INIT control of the initial setting, SGNL is 960 or more.
• Remedy: Check on a break in the ATR sensor, Check on operation of the shutter, Replace the ATR sensor

• Code: E020-XX13
• Description: Drum/Developer-related error XX=01:Y XX=02:M XX=03:C XX=04:K XX=00:Any color
  In INIT control of the initial setting, REF is 960 or more.
• Remedy: Check on a break in the ATR sensor, Replace the ATR sensor

• Code: E020-XX50
• Description: Drum/Developer-related error XX=01:Y XX=02:M XX=03:C XX=04:K XX=00:Any color
  When density data is computed using SGNL value and REF value in ATR control, REF becomes 0 due to backup data corruption.
• Remedy: Clean the ATR sensor window, Check on attachment of the developing unit, Check on a break in the ATR sensor, Replace the ATR sensor, Replace the DC controller PCB

• Code: E020-XX51
• Description: Drum/Developer-related error XX=01:Y XX=02:M XX=03:C XX=04:K XX=00:Any color
  When density data is computed using SGNL value and REF value in ATR control, the sensitivity coefficient becomes 0 due to backup data corruption.
• Remedy: Replace the DC controller PCB

• Code: E020-XX81
• Description: Drum/Developer-related error XX=01:Y XX=02:M XX=03:C XX=04:K XX=00:Any color
  P-SENS-P is less than 255 when a base (drum face) of patch detection is read out.
• Remedy: Clean the patch image reading sensor window

• Code: E020-XX90
• Description: Drum/Developer-related error XX=01:Y XX=02:M XX=03:C XX=04:K XX=00:Any color
  A computation result of patch reading in patch detection is less than 16.
• Remedy: Check on attachment of the developing unit, Replace the patch image reading sensor, Replace the developing unit