U1-Xxxx (Fuser Error) - Samsung SL-M4080FX Service Manual

4.7.2.7. U1-xxxx (Fuser error)

► Error Code
U1–21xx / U1–23xx
► Error message
Error #U1-2xxx Turn off then on.
► Symptom
The temperature control of fuser unit is abnormal.
► Troubleshooting method
1) Turn the machine off. Re-install the fuser unit. Then turn the machine on. Is the error message is disappeared?
2) If the problem persists, turn the machine off and remove the fuser unit.
a) Check if the fuser connector is connected properly.
b) Check if the input voltage is normal.
c) Check if the thermistor is twisted or contaminated; and is in contact with the Heat Roller.
3) After confirming continuity in the fuser connector and the problem still exists; order an SMPS and Fuser Unit
and install as is necessary.
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4. Troubleshooting
4-94