• Code: M1-5012
• Display: Paper Empty in Tray
• Description: Paper is empty in tray.
• Remedy: 1) Remove the cassette. Check if the paper is loaded. 2) If the problem persists, replace the paper empty sensor.

• Code: M3-1110
• Display: Paper jam in exit area.
• Description: The jammed paper has occurred in the exit area.
• Remedy: 1) Remove the jammed paper. 2) If the problem persists, check the following. a) Check if there is any obstacles or paper on the paper path. Remove it. b) Check if the fuser unit is assembled properly. If the fuser unit is defective, replace it.

• Code: M3-2130
• Display: Output bin full Remove paper
• Description: The paper is full on the exit tray.
• Remedy: 1) Remove the paper. 2) If the problem persists, remove the top cover. 3) Check if the bin full sensor connector is connected properly. 4) If the connection is OK, replace the bin full sensor.

• Code: S1-5221
• Display: Wireless Network Error
• Description: The communication error between the main board and WLAN board has occurred.
• Remedy: 1) Turn the machine off then on. If the problem persists, turn the machine off. 2) Remove the right cover. Check the connection between the main board and WLAN board. 3) If the connection is OK, replace the WLAN board.

• Code: S2-4110
• Display: Door is open. Close it.
• Description: Door is opened or the cover open switch is defective.
• Remedy: 1) Check if the front cover is closed perfectly. 2) If the error persists, check that the cover-open sensor is working normally. If it is defective, replace it.

• Code: S2-4611
• Display: Top door Open or Exit JAM
• Description: Top door is opened or the paper jam has occurred in exit area.
• Remedy: 1) Open and close the top door. 2) If there is a jammed paper, remove it. 3) Open and close the top door again.

• Code: S6-3123
• Display: Network Problem:IP Conflict
• Description: IP address conflicts with that of other system.
• Remedy: 1) Change the machine’s IP address. 2) Check the setting-up for 802.1x confirmation server.

• Code: U1-2320, U1-2330
• Display: Error # Turn off then on
• Description: The temperature control of fuser unit is abnormal.
• Remedy: 1) Check if the input voltage is normal. 2) Turn the machine off. Remove and reinstall the fuser unit. Be careful when connecting the AC-connector and Thermistor connector. 3) Turn the machine on. Is the error message is disappeared? 4) Check the followings. If the fuser unit has any problem, replace it. a) Check if the fuser connector is connected properly. b) Check if the halogen lamp voltage is normal. c) Check if the thermistor is contaminated or twisted. 5) If the problem persists, replace the main board or SMPS board.