Display: Wireless network card is not installed. Install the card.
Description: The communication error between the main board and the wireless board has occurred.
Remedy: 1) Check if the connection between the main board and the wireless board is normal. 2) If the connection is OK, replace the flat cable. 3) If the flat cable is OK, replace the WLAN board. 4) If the problem persists after replacing the WLAN board, replace the main board.
Code: S2-4110
Display: Door is open. Close it.
Description: Top cover is open or the cover open switch is defective.
Remedy: 1) Check if the top cover is closed perfectly. Open and close it. 2) Remove the right cover. Check if the connection between the main board and SMPS/HVPS board is correct. 3) Check if the cover open switch on SMPS/HVPS board is operated properly. If it is defective, replace the SMPS/HVPS board.
Code: S6-3123
Display: This IP address conflicts with that of other system. Check it.
Description: Network has some problem. (IP address conflicts with that of other system. / Communication error / There is no response when checking the ping test.)
Remedy: Change the machine’s IP address. • Execute the Samsung Easy Printer Manager program. (Device setting - Network - IP address). Change the IP address. • In case of DHCP or Bootp, reboot the machine to receive a new IP address.
Code: U1-2320, U1-2330, U1-2340
Display: Fuser Unit Failure # : Turn off then on.
Description: The temperature control of fuser unit is abnormal. (U1-2320 : Open Heat Error / U1-2330 : Low Heat Error / U1-2340 : Over Heat Error)
Remedy: 1) Turn the machine off. Re-install the fuser unit. Then turn the machine on. Is the error message is disappeared? 2) If the problem persists, turn the machine off and remove the fuser unit. a) Check if the fuser connector is connected properly. b) Check if the input voltage is normal. c) Check if the thermistor is twisted or contaminated. 3) After confirming continuity in the fuser connector and the problem still exists; order an SMPS/HVPS and Fuser Unit and install as is necessary.
Code: U2-1112, U2-1113
Display: LSU Unit Failure #. Turn off then on.
Description: LSU Motor does not work normally.
Remedy: 1) Check if the LSU harness on the main board is connected properly. (picture- 1) 2) If it is OK, check that the LSU harness on LSU board is connected properly. (picture- 2,3) 3) Check if the LSU harness is defective. (picture- 4,5) 4) If the problem persists, replace the LSU. 5) If the problem persists after replacing LSU, replace the main board.