4. Troubleshooting► Error CodeU2–6142U2–6143► Error messageLSU Failure #U2-6142: Turn off then on.LSU Failure #U2-6143: Turn off then on.► SymptomHsync signal of the LSU 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 :a) Turn the machine off and open the side cover. Unplug and reconnect the LSU cable. Print a demo page tocheck that the machine operates normally.b) Turn the machine off and open the side cover. Unplug and reconnect the LSU cable on main board. Print ademo page to check that the machine operates normally.c) If the LSU cable(JC39-01688A) is defective, replace it. Check that the LSU motor makes a sound after turningthe machine on.d) If the problem persists, replace the LSU(JC97-04010A).Copyright© 1995-2013 SAMSUNG. All rights reserved. 4-198
