Description: Door is open or the cover open switch is defective.
Remedy: 1) Check if the front cover is closed perfectly. 2) Check if the connection between the main board and HVPS board is correct. 3) Check if the cover open switch on HVPS board is operated properly. If it is defective, replace the 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
Display: Fuser Unit Failure #U1-2320 : Turn off then on.
Description: The temperature control of fuser unit is abnormal. (Open 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. Check if the fuser connector is connected properly. Check if the input voltage is normal. 3) After confirming continuity in the fuser connector and the problem still exists; order an SMPS and Fuser Unit and install as is necessary.
Code: U1-2330, U1-2340
Display: Fuser Unit Failure # : Turn off then on.
Description: The temperature control of fuser unit is abnormal. (Low Heat Error or 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 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) Execute the LSU motor test in EDC program. Check the LSU motor operation sound. 2) If there is no sound, remove the right cover. Check if the LSU harness on the main board is connected properly. (see pictures below) 3) If it is OK, remove the top cover. Check if the LSU harness on LSU board is connected properly. (see pictures below) 4) Check if the LSU harness is defective. (see pictures below) 5) Reconnect the LSU harness and then execute the LSU motor test in EDC program again. 6) If the problem persists, replace the LSU. 7) If the problem persists after replacing LSU, replace the main board.