• Code: 124
• Display: SERVICE CALL 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: SERVICE CALL 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: SERVICE CALL 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: SERVICE CALL 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 printer. Replace the LED head unit.

• Code: 142
• Display: SERVICE CALL 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: SERVICE CALL 153:ERROR
• Description: Image drum unit fuse-cut error
• Remedy: Is the image drum unit installed properly? Does the error occur again? Is the printer recovered by replacing the toner sensor board.
  Re-install it. Turn off and on the printer. 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: SERVICE CALL 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 printer. Be sure of cable connection, and then replace the CU/PU board.

• Code: 155
• Display: SERVICE CALL 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 re-install the fuser unit. Turn off and on the printer. Be sure of cable connection, and then replace the CU/PU board.