Network Problem : Ip Conflict; Error #U1-2320 Turn Off Then On; Error #U1-2330 Turn Off Then On; Error #U1-2340 Turn Off Then On - Samsung SCX-472 series Service Manual

4. Alignment and Troubleshooting
► Error Code
S6–3123
► Error message

Network Problem : IP Conflict

► Symptom
Network has some problem. (IP address conflicts with that of other system. / Communication error / There is no
response when checking the ping test.)
► Troubleshooting method
Change the machine's IP address.
• Execute the Samsung Easy Printer Manager program. (Device setting — Network — IP address). Change the
IP address.
• In case of DHCP or Bootp, reboot the machine to receive a new IP address.
► Error Code
U1–2320
► Error message

Error #U1-2320 Turn off then on

► Symptom
The temperature control of fuser unit is abnormal. (Open 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. Check if the fuser connector is connected
properly. Check if the input voltage is normal.
► Error Code
U1–2330
U1–2340
► Error message

Error #U1-2330 Turn off then on

Error #U1-2340 Turn off then on

► Symptom
The temperature control of fuser unit is abnormal. (Low Heat Error or 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.
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