Samsung SF-76x series Service Manual page 84

4. Alignment and Troubleshooting
► Error Code
U2–1112
U2–1113
► Error message
Error #U2-1112 Turn off then on
Error #U2-1113 Turn off then on
► Symptom
LSU Motor does not work normally.
► Troubleshooting method
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.
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