• Code: 54.00.06
• Display: 54.XX.YY Error
• Description: A sensor error has occurred.
  Registration density sensor failure
• Remedy: 1. Open and close the right door (or turn on and then off the power switch) to perform the color plane registration. 2. If the error persists, replace the registration density sensor assembly.

• Code: 54.00.14
• Display: 54.XX.YY Error
• Description: A sensor error has occurred.
  Registration density sensor failure
• Remedy: 1. Open and close the right door (or turn on and then off the power switch) to perform the color plane registration. 2. If the error persists, replace the registration density sensor assembly.

• Code: 54.00.19
• Display: 54.XX.YY Error
• Description: A sensor error has occurred.
  Registration density sensor failure
• Remedy: 1. Open and close the right door (or turn on and then off the power switch) to perform the color plane registration. 2. If the error persists, replace the registration density sensor assembly.

• Code: 54.01.05
• Display: 54.XX.YY Error
• Description: A sensor error has occurred.
  Paper sensor is out of calibration range
• Remedy: 1. Turn the product off, and then clean the paper sensor with a lint-free cloth. Turn the product on. 2. If the error persists, replace the paper pickup assembly.

• Code: 54.06.21
• Display: 54.XX.YY Error
• Description: A sensor error has occurred.
  Primary laser/scanner beam detect abnormality
• Remedy: 1. Turn the product off, and then on. 2. If the error persists, replace the laser/scanner assembly. 3. If the product has had parts removed or replaced, check the connector (J110-C/M or J111-C/M) on the DC controller PCA.

• Code: 54.0X.0B
• Display: 54.XX.YY Error
• Description: A sensor error has occurred.
  Density sensor out of range error or Dhalf calibration failure
  X = 0 black, X = 1 cyan, X = 2 magenta, X = 3 yellow
• Remedy: 1. Check the supplies status page to make sure the toner cartridges are not past their useful life. 2. Check the ITB for damage. 3. Make sure the CPR sensor is not contaminated with toner or paper dust. Clean the sensor with compressed air and soft brush. 4. If error persists, replace the registration sensor assembly.

• Code: 54.0X.0C
• Display: 54.XX.YY Error
• Description: A sensor error has occurred.
  Density sensor out of range error or Dhalf calibration failure
  X = 0 black, X = 1 cyan, X = 2 magenta, X = 3 yellow
• Remedy: 1. Check the supplies status page to make sure the toner cartridges are not past their useful life. 2. Check the ITB for damage. 3. Make sure the CPR sensor is not contaminated with toner or paper dust. Clean the sensor with compressed air and soft brush. 4. If error persists, replace the registration sensor assembly.

• Code: 54.0X.0D
• Display: 54.XX.YY Error
• Description: A sensor error has occurred.
  Optical memory element abnormal or CPR sensor out of range
  X = 0 black, X = 1 cyan, X = 2 magenta, X = 3 yellow
• Remedy: 1. Check the supplies status page to make sure the toner cartridges are not past their useful life. 2. Check the ITB for damage. 3. Make sure the CPR sensor is not contaminated with toner or paper dust. Clean the sensor with compressed air and soft brush. 4. If error persists, replace the registration sensor assembly.