• Code: 124
• Display: Inspection is required. 124 : Error
• Description: Ambient temperature error
• Remedy: Is the cable from the CU/PU board to the toner sensor board connected properly?
  Re-connect it properly. Replace the toner sensor board.

• Code: 128.05
• Display: Inspection is required. 128 : Error 05
• Description: Image drum fan error
• Remedy: Is the connector of the fan connected properly? Does the error occur again?
  Re-connect it properly. Replace the fan motor. Replace the CU/PU board.

• Code: 128.08
• Display: Inspection is required. 128 : Error 08
• Description: Front fan error
• Remedy: Is the connector of the fan connected properly? Does the error occur again?
  Re-connect it properly. Replace the fan motor. Replace the CU/PU board.

• Code: 131 ... 134
• Display: Inspection is required. 131 : Error - 134 : Error
• Description: LED head detection error (131=Y, 132=M, 133=C, 134=K)
• Remedy: Is the LED head installed properly? Is the LED head fuse broken? Does the error occur again?
  Install the LED head unit. Check the LED head fuse. Check the fuse. Turn off and on the MFP. Replace the LED head unit.

• Code: 142
• Display: Inspection is required. 142 : Error
• Description: Image drum up-down movement position detection error
• Remedy: Is the image drum unit removed and installed smoothly? Is the connector of the image drum up-down clutch is connected properly?
  Re-install it. Be sure of the connection of the image drum up-down clutch connector. Replace the toner sensor board. Connect the image drum updown clutch properly.

• Code: 153
• Display: Inspection is required. 153 : Error
• Description: Image drum unit fuse-cut error
• Remedy: Is the image drum unit installed properly? Does the error occur again? Is the MFP recovered by replacing the toner sensor board.
  Re-install it. Turn off and on the MFP. Be sure of the cable connection from the CU/PU board to the toner sensor board, and then replace the toner sensor board. Replace the CU/PU board.

• Code: 154
• Display: Inspection is required. 154 : Error
• Description: Belt unit fusecut error
• Remedy: Is the belt unit installed properly? Does the error occur again?
  Re-install it. Turn off and on the MFP. Be sure of cable connection, and then replace the CU/PU board.

• Code: 155
• Display: Inspection is required. 155 : Error
• Description: Fuser unit fuse-cut error
• Remedy: Is the fuser unit installed properly? Does the error occur again?
  Clean the connection connector of the fuser unit, and then reinstall the fuser unit. Turn off and on the MFP. Be sure of cable connection, and then replace the CU/PU board.