4. Alignment and Troubleshooting
4.7.2.8. U2-xxxx (LSU error)
► Error Code
U2–1111 / U2-1112
U2–2112 / U2-2113 / U2–3112 / U2–3113 / U2–4112 / U2–4113 / U2–5112 / U2–5113
► Error message
Error: #U2-xxxx Turn off then on
► Symptom
LSU Motor does not work normally or LSU H Sync signal is abnormal.
► Troubleshooting method
1) Execute the LSU motor test in SVC mode. Check LSU motor operation sound.
2) If there is no sound, remove the right cover. Check if the LSU harness is connected on the main board properly.
3) If it is OK, remove the top cover. Check if the LSU harness is connected on LSU board properly.
4) Check if the LSU harness is defective.
5) Reconnect the LSU harness and then execute the LSU motor test again.
6) If the problem persists, replace the LSU.
7) If the problem persists after replacing LSU, replace the main board.
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