U2-Xxxx Type (Lsu) Error Code - Samsung MultiXpress M537x series Service Manual

4. Troubleshooting

4.6.8. U2-xxxx type (LSU) error code

► Error Code
U2–1112
► Error message
LSU Failure: #U2-1112. Please turn off then on.
► Symptom
LSU motor does not operate or it operates abnormally. Motor ready signal is abnormal.
► Troubleshooting method
1) Turn the machine off then on. Check for the LSU motor operation sound during warm-up.
2) Print a demo page to check that the machine operates normally.
3) If the problem persists, check the following :
• If the LSU motor makes a sound,
a) Enter SVC mode to check the LSU motor ready signal.
b) Select "LSU Motor1 Run Ready". ( Diagnostics > Engine Diagnostics > Engine Test Routines >
110-0000)
c) Press 'Start' button. Check that the status has changed to 'Executing -> Low -> High'.
d) If the status has not changed, the motor ready signal is abnormal. Replace the LSU.
• If the LSU motor does not makes a sound,
a) Turn the machine off. Unplug and reconnect the LSU cable.
Check that the LSU motor make a sound after turning the machine on.
b) If the LSU Cable is defective, replace it. Check that the LSU motor make a sound after turning the
machine on.
c) If the problem persists, replace the LSU.
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