• Code: 54.00.14
• Display: 54.00.06 or 54.00.14 or 54.00.19 (EVENT LOG ONLY)
• Description: 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. Clean toner dust and debris from the front and rear density sensors and surrounding areas using compressed air and/or soft brush. NOTE: To clean the density sensors open right and front doors and remove both the Fuser and ITB. Close front door to expose the density sensors for cleaning. 3. Reconnect the connector (J120) on the DC controller PCA. 4. If the error persists, replace the registration density sensor assembly.

• Code: 54.00.19
• Display: 54.00.06 or 54.00.14 or 54.00.19 (EVENT LOG ONLY)
• Description: 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. Clean toner dust and debris from the front and rear density sensors and surrounding areas using compressed air and/or soft brush. NOTE: To clean the density sensors open right and front doors and remove both the Fuser and ITB. Close front door to expose the density sensors for cleaning. 3. Reconnect the connector (J120) on the DC controller PCA. 4. If the error persists, replace the registration density sensor assembly.

• Code: 54.01.05
• Display: 54.01.05 (EVENT LOG ONLY)
• Description: Media sensor is out of calibration range
• Remedy: 1. Clean the media sensor assembly with lint-free cloth. Turn the power off and then on. 2. Reconnect the connector (J3) of the media sensor assembly and connector (J124) on the DC controller PCA. 3. Replace the registration assembly.

• Code: 54.06.21
• Display: 54.06.21 (EVENT LOG ONLY)
• Description: Primary laser/scanner beam detect abnormality
• Remedy: 1. Turn the printer off, and then on.2. Check the connector (J126 and J127) on the DC controller PCA.3. If the error persists, replace the laser/scanner assembly.

• Code: 54.0X.07
• Display: 54.0X.07 (EVENT LOG ONLY)
• Description: The printer experienced a Drum home position sensor error. • 54.05.07: Black Drum • 54.06.07: Cyan Drum • 54.07.07: Magenta Drum • 54.08.07: Yellow Drum
• Remedy: 1. Turn the printer off and then on.2. Reconnect the connector (J114) on the DC controller PCA.3. Replace the Main Drive Assembly.

• Code: 54.0X.0B
• Display: 54.0X.0B or 54.0X.0C or 54.0X.0B or 54.0X.0C (EVENT LOG ONLY)
• Description: Density sensor out of range error or Dhalf calibration failure • 54.00.0B, 54.00.0C 54.00.0D, 54.00.0E . Black • 54.01.0B, 54.01.0C 54.01.0D, 54.01.0E . Cyan • 54.02.0B, 54.02.0C 54.02.0D, 54.02.0E . Magenta • 54.03.0B, 54.03.0C 54.03.0D, 54.03.0E . Yellow
• Remedy: 1. Turn the power off and then on.2. Check the supplies status page to make sure the toner cartridges are not past their useful life.3. Clean any excess toner accumulation on the printer using compressed air, soft brush or toner cloth.4. Check the ITB for damage and replace if necessary. 5. Make sure the RD sensor is not contaminated with toner or paper dust. Clean the sensor with compressed air and soft brush. NOTE: To clean the density sensors open right and front doors and remove both the Fuser and ITB. Close front door to expose the density sensors for cleaning. 6. If the error persists, replace the registration sensor assembly.

• Code: 54.0X.0B
• Display: 54.0X.0B or 54.0X.0C or 54.0X.0B or 54.0X.0C (EVENT LOG ONLY)
• Description: Density sensor out of range error or Dhalf calibration failure • 54.00.0B, 54.00.0C 54.00.0D, 54.00.0E . Black • 54.01.0B, 54.01.0C 54.01.0D, 54.01.0E . Cyan • 54.02.0B, 54.02.0C 54.02.0D, 54.02.0E . Magenta • 54.03.0B, 54.03.0C 54.03.0D, 54.03.0E . Yellow
• Remedy: 1. Turn the power off and then on.2. Check the supplies status page to make sure the toner cartridges are not past their useful life.3. Clean any excess toner accumulation on the printer using compressed air, soft brush or toner cloth.4. Check the ITB for damage and replace if necessary. 5. Make sure the RD sensor is not contaminated with toner or paper dust. Clean the sensor with compressed air and soft brush. NOTE: To clean the density sensors open right and front doors and remove both the Fuser and ITB. Close front door to expose the density sensors for cleaning. 6. If the error persists, replace the registration sensor assembly.

• Code: 54.0X.0C
• Display: 54.0X.0B or 54.0X.0C or 54.0X.0B or 54.0X.0C (EVENT LOG ONLY)
• Description: Density sensor out of range error or Dhalf calibration failure • 54.00.0B, 54.00.0C 54.00.0D, 54.00.0E . Black • 54.01.0B, 54.01.0C 54.01.0D, 54.01.0E . Cyan • 54.02.0B, 54.02.0C 54.02.0D, 54.02.0E . Magenta • 54.03.0B, 54.03.0C 54.03.0D, 54.03.0E . Yellow
• Remedy: 1. Turn the power off and then on.2. Check the supplies status page to make sure the toner cartridges are not past their useful life.3. Clean any excess toner accumulation on the printer using compressed air, soft brush or toner cloth.4. Check the ITB for damage and replace if necessary. 5. Make sure the RD sensor is not contaminated with toner or paper dust. Clean the sensor with compressed air and soft brush. NOTE: To clean the density sensors open right and front doors and remove both the Fuser and ITB. Close front door to expose the density sensors for cleaning. 6. If the error persists, replace the registration sensor assembly.