Samsung SL-X7600GX Service Manual page 452

4. Troubleshooting
► Error Code
U2–7110 / U2–7111 / U2–7112
► Error message
LSU Failure: #U2-711x. Turn off then on
► Symptom
Temperature sensor of the LSU is abnormal.
► Troubleshooting method
CAUTION
Before unplugging the LSU harness, the machine must be turned off and power cord must be removed.
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) Turn the machine off and open the side cover. Unplug and reconnect the LSU cable. Print a demo page to
check 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 a
demo page to check that the machine operates normally.
c) If the LSU cable is defective, replace it. Check that the LSU motor makes a sound after turning the machine on.
d) If the problem persists, replace the LSU.
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