Samsung CLX-8640 series Service Manual page 400

4. Troubleshooting
► Error Code
U1–2115
► Error message
Fuser Unit Failure: #U1-2115. Turn off then on. Call for service if the problem persists
► Symptom
The pressure control unit(Cam unit)of the fuser is abnormal.
► Troubleshooting method
CAUTION
The temperature gets hot around the Fuser Unit. To prevent injury, make sure the Fuser Unit area is cool before
performing this procedure.
1) Turn the machine off then on.
2) Turn the machine off. Re-install the fuser unit. Then turn the machine on.
3) If the problem persists, remove the rear cover. Check if the fuser connector is connected correctly.
4) If the connection is OK, remove the fuser unit.
5) Remove the left/right cover after removing 4 screws.
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