Samsung SCX-483xFD Service Manual page 128

● Code
U1-2330
● Symptom / Cause
The temperature control of fuser unit is abnormal. (Low Heat Error)
● 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.
● Code
U1-2340
U1-2341
● Symptom / Cause
The temperature control of fuser unit is abnormal. (Over Heat Error)
● 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.
Service Manual
SCX-483x/5x3x series
4. Alignment and Troubleshooting
● Error message
Error #U1-2330 Turn off then on.
● Error message
Error #U1-2340 Turn off then on.
Error #U1-2341 Turn off then on.
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Samsung Electronics