• Code: 50.4X.YZ
• Display: 50.WX.YZ Fuser error To continue turn off then on
• Description: The fuser has experienced an error. W = fuser error code, X = fuser mode, Y = previous printer sleep state, Z = next printer sleep state.
  Drive circuit faulture
• Remedy: 1. Check the power source. Make sure the power source meets product requirements. NOTE: If the power source does not meet the power frequency requirement of 40 to 70Hz, the fuser temperature control does not work properly and causes this error. 2. Reconnect the connector (J53) on the DC controller PCA. 3. If the error persists, replace the low-voltage power supply.

• Code: 50.7X.YZ
• Display: 50.WX.YZ Fuser error To continue turn off then on
• Description: The fuser has experienced an error. W = fuser error code, X = fuser mode, Y = previous printer sleep state, Z = next printer sleep state.
  Fuser pressure-release mechanism failure
• Remedy: 1. Reinstall the fuser. Check the connector (J128) between the fuser and the product. If it is damaged, replace the fuser. 2. Check the fuser pressure-release sensor flag. If it is damaged, replace the fuser. 3. Reconnect the connector (J221) of the fuser motor and the connector (J89) on the DC controller PCA. 4. Use the fuser motor (M299) drive test in the component test to verify that the fuser motor is properly functioning. If it is not, replace the fuser motor. 5. Replace the fuser.

• Code: 50.8X.YZ
• Display: 50.WX.YZ Fuser error To continue turn off then on
• Description: The fuser has experienced an error. W = fuser error code, X = fuser mode, Y = previous printer sleep state, Z = next printer sleep state.
  Low fuser temperature 2
• Remedy: 1. Reinstall the fuser. Check the connector (J128) between the fuser and the product. If it is damaged, replace the fuser. 2. Reconnect the connector (J54) on the DC controller PCA. 3. Replace the fuser. 4. Reconnect the connector (J62) on the low-voltage power supply PCA. 5. If the error persists, replace the low-voltage power supply.

• Code: 50.9X.YZ
• Display: 50.WX.YZ Fuser error To continue turn off then on
• Description: The fuser has experienced an error. W = fuser error code, X = fuser mode, Y = previous printer sleep state, Z = next printer sleep state.
  High fuser temperature 2
• Remedy: 1. Reinstall the fuser. Check the connector (J128) between the fuser and the product. If it is damaged, replace the fuser. 2. Reconnect the connector (J54) on the DC controller PCA. 3. Replace the fuser. 4. Reconnect the connector (J62) on the low-voltage power supply PCA. 5. If the error persists, replace the low-voltage power supply.

• Code: 51.00.20
• Display: 51.00.YY Error
• Description: Laser/scanner errorure
  Black laser/scanner error
• Remedy: 1. Reconnect connector (J145) on the laser/scanner. 2. Reconnect connectors (J86 and J93) on the DC controller. 3. If the error persists, replace the laser/scanner.

• Code: 52.00.00
• Display: 52.XX.00 Error To continue turn off then on
• Description: Laser/scanner error
  laser/scanner motor startup error
• Remedy: 1. Reconnect connector (J145) on the laser/scanner. 2. Reconnect connectors (J86 and J93) on the DC controller. 3. Use the scanner motor (M108) drive test in the component test to verify that the scanner motor is properly functioning. If it is not, replace the laser/scanner. NOTE: Listen for a high pitched whine from the motor. 4. If the error persists, replace the laser/scanner.

• Code: 52.20.00
• Display: 52.XX.00 Error To continue turn off then on
• Description: Laser/scanner error
  Laser/scanner rotation error
• Remedy: 1. Reconnect connector (J145) on the laser/scanner. 2. Reconnect connectors (J86 and J93) on the DC controller. 3. Use the scanner motor (M108) drive test in the component test to verify that the scanner motor is properly functioning. If it is not, replace the laser/scanner. NOTE: Listen for a high pitched whine from the motor. 4. If the error persists, replace the laser/scanner.

• Code: 54.00.03
• Display: 54.XX.YY Error
• Description: A sensor error has occurred.
  Environmental sensor (TH3) failure
• Remedy: 1. Turn the product off, and then on. 2. If the environment sensor has been removed or replaced, check the connector (J199) on the environment sensor and the connector (J42) on the DC controller PCA. 3. If the error persists, replace the environment sensor assembly.