4. Troubleshooting4.6.8. U2-xxxx type (LSU) error code► Error CodeU2–6121U2–6122U2–6123► Error messageLSU Failure: #U2-6121. Please turn off then on.LSU Failure: #U2-6122. Please turn off then on.LSU Failure: #U2-6123. Please turn off then on.► SymptomLSU motor does not operate or it operates abnormally. Motor ready signal is abnormal.► Troubleshooting method1) 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.(Diagnostics > Engine Diagnostics > Engine Test Routines)- Press 1,2,3 number keys simultaneously. When the password dialog box appears, enter “1934” andpress the “OK” button.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(JC97-04073A).(Refer to 3.3.6. LSU)• If the LSU motor does not makes a sound,a) Turn the machine off and open the side cover. Unplug and reconnect the LSU cable. (JC39-01743A : MotorHarness, JC39-01791A : Flat cable) Check that the LSU motor make a sound after turning the machine on.b) If the LSU Cable(JC39-01743A : Motor Harness, JC39-01791A : Flat cable) is defective, replace it. Checkthat the LSU motor make a sound after turning the machine on.c) If the problem persists, replace the LSU(JC97-04073A).4-249 Copyright© 1995-2013 SAMSUNG. All rights reserved.
