U2-Xxxx Type (Lsu) Error Code - Samsung CLX-9201 Service Manual

4.5.8. U2-xxxx type (LSU) error code

► Error Code
U2–6121
U2–6122
U2–6123
► Error message
LSU Failure #U2-6121: Turn off then on.
LSU Failure #U2-6122: Turn off then on.
LSU Failure #U2-6123: 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 :
a) If the LSU motor makes a sound,
i) Enter SVC mode to check the LSU motor ready signal.
( Diagnostics > Engine Diagnostics > Engine Test Routines)
• Press 1,2,3 number keys simultaneously. When the password dialog box appears, enter "1934" and
press the "OK" button.
ii) Select "LSU Motor1 Run Ready". ( Diagnostics > Engine Diagnostics > Engine Test Routines >
110-0000)
iii) Press 'Start' button. Check that the status has changed to 'Executing -> Low -> High'.
iv) If the status has not changed, the motor ready signal is abnormal. Replace the LSU. (JC97-04010A) (Refer
to 3.3.5. LSU in chapter 3)
b) If the LSU motor does not makes a sound,
i) Turn the machine off and open the side cover. Unplug and reconnect the LSU cable. Check that the LSU
motor make a sound after turning the machine on.
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4. Troubleshooting
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