Samsung SL-M4580FX Service Manual page 215

► Error Code
U1–2117
► Error message
Fuser unit Failure: #U1-2117. Turn off then on.
► Symptom
The machine can't detect that the fuser unit is installed.
► Troubleshooting method
CAUTION
The temperature gets hot around the fuser unit. To prevent burns, make sure the fuser unit area is cool before
performing this procedure.
1) After checking the fuser installation, turn the machine off then on.
2) Open the rear cover. Lift up the right side and release the rear cover.
3) If there is no problem, remove 4 screws.
4) Lift up the both levers. Then take off the fuser unit.
5) If there is no problem for above steps, assemble and reinstall fuser unit. Then turn the machine on.
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4. Troubleshooting
4-112