Samsung MultiXpress X4 Series Service Manual page 537

4.8.6. LSU problem
No Problem Description
1 ACR fail problem
2 Loud noise sound of LSU motor
1) ACR fail problem
•
Symptom : Set UI indicates ACR fail message.
•
Cause : The brokenness of reflection mirror
•
Troubleshooting
1) Check the assembly condition inside of LSU.
2) If the reflection mirror is deviated, replace the LSU.
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4. Troubleshooting
Troubleshooting Page
P.4–285
P.4–286
4-287