Samsung SCX-483xFD Service Manual page 129

● Code
U2-1111 / U2-1113
● Symptom / Cause
LSU Motor does not work normally.
1. Harness connection error.
2. LSU is defective.
3. Main board is defective.
● Troubleshooting method
1. Execute the LSU motor test in EDC 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.
(picture-①)
3. If it is OK, remove the top cover. Check if the LSU harness is connected on LSU board properly. (picture- ②,③)
4. Check if the LSU harness is defective. (picture-④)
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.
Service Manual
SCX-483x/5x3x series
4. Alignment and Troubleshooting
● Error message
Error #U2-1111 Turn off then on. / Error #U2-1113 Turn off then on.
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Samsung Electronics