Samsung ML6512N

• Code: S2-4110
• Display: Door is open. Close it
• Description: The top cover is closed but error message is not disappeared. 1. Harness connection error. 2. Micro Switch defect.
• Remedy: 1. Check if the harness (Picture(1)-..) is normal. 2. Check if the harness is the connected to the Relay connector (Picture(1)-..) properly. 3. Check if the connector CN9 (Picture(1)-..) on the engine board is connected properly. 4. Open the cover of the OPE panel. Check if the UI message is changed when pushing the micro switch (Picture(2)-..). 5. If the micro switch is defective, replace it.

• Code: S2-4610
• Display: Rear Door is open. Close it
• Description: The rear cover is closed but error message is not disappeared. 1. The rear cover is closed perfectly. 2. Relay connector pin is defective. 3. Harness connection error.
• Remedy: 1. Check if the rear cover is closed perfectly. 2. Check the Relay connector Pin If it is defective, replace it. 3. Check the Relay connector if it is defective, replace it. 4. Remove the left cover. Check the harness.. between the Joint board and Relay connector. 5. Check if the harness is connected to the connector properly.

• Code: S6-3123
• Display: This IP address conflicts with that of other system
• Description: IP address conflicts with that of other system.
• Remedy: Change the machine’s IP address.

• Code: S6-3128
• Display: 802.1x Network Error Contact the Admin.
• Description: Can not get the authentication from server after setting up to 802.1x on SWS. Can not access to network.
• Remedy: Check if the Authentication method is selected properly. Check if the User Name/Password is entered properly.

• Code: U1-2115
• Display: Fuser Unit Failure: #U1-2115. Turn off then on
• Description: The photo sensor is defective or some part is not assembled properly.
• Remedy: 1. Remove the Rear Cover and Duplex Unit. Remove the fuser unit after removing 4 screws. 2. Remove the GUIDE-EXIT LOWER. To remove it, fi rst, push and release the green lever to the direction of arrow. Then, lift and pull it. 3. To remove the COVER-DUPELX, a. Remove 1 screw. Lift up the COVER-DUPLEX PATH to the direction of arrow slightly. b. Release the both hooks with the tweezers or (-) driver. 4. Remove the COVER-LEFT after removing 2 screws. Remove the COVER-RIGHT after removing 2 screws. 5. Check if the photo sensor connector from the COVER-RIGHT is connected properly. 6. Check if the left/right CAM and the ENCORDER are assembled properly. 7. If there is no problem for above steps, reassemble the fuser unit and turn the machine on. 8. If the error persists, download the fi rmware again. 9. If the problem persists, replace the fuser unit with new one. 10. If the problem persists, replace the engine board.

• Code: U1-2117
• Display: Fuser Unit Failure: #U1-2117. Turn off then on
• Description: The photo sensor is defective or some part is not assembled properly.
• Remedy: 1. Remove the Rear Cover and Duplex Unit. Remove the fuser unit after removing 4 screws. 2. Remove the GUIDE-EXIT LOWER. To remove it, fi rst, push and release the green lever to the direction of arrow. Then, lift and pull it. 3. To remove the COVER-DUPELX, a. Remove 1 screw. Lift up the COVER-DUPLEX PATH to the direction of arrow slightly. b. Release the both hooks with the tweezers or (-) driver. 4. Check if the fuser is assembled and fuser connector is connected properly. 5. If there is no problem for above steps, reassemble the fuser unit and turn the machine on. 6. If the error persists, execute the Memory Clear. (Note: Perform a backup first if necessary.) 7. If the problem persists, replace the fuser unit with new one. 8. If the problem persists, replace the engine board.