Error #U2-6120 Turn Off Then On; Error #U2-6140 Turn Off Then On - Samsung Xpress C480 Series Service Manual

4. Alignment and Troubleshooting
► Error Code
U2-6120
U2-6140
► Error message

Error #U2-6120 Turn off then on

Error #U2-6140 Turn off then on

► Symptom
LSU Motor does not work normally. / LSU Hsync signal is abnormal.
► Troubleshooting method
1) Check if the LSU harness on the main board is connected properly.
2) If it is OK, check that the LSU harness on LSU board is connected properly.
3) Check if the LSU harness is defective.
4) If the problem persists, replace the LSU.
5) If the problem persists after replacing LSU, replace the main board.
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