Samsung CLP-325 Series Service Manual page 115

3) Fuser error
a) Low heat error
"Error #U1-1211 Turn off then on"
message has occurred.
(For 110V : 1.35±1 ohm
For 220V : 4.7±1 ohm)
AC-Harness Short?
Thermostat Open?
Thermostat Pollution, Bend?
Thermostat Resistance Defect?
(300~450kohm @ 25℃)
Service Manual
Alignment & Troubleshooting
Lamp open?
NO
Lamp Short?
NO
NO
NO
NO
NO
Yes
Yes
Yes
Yes
Yes
Yes
Replace Fuser & recheck
The SMPS and Main B'd
4-58
Change Fuser Lamp
4713-001243
Change Fuser Lamp
4713-001243
AC-Harness Change
Replace Thermostat
4712-001031
Replace Thermostat
1404-001447
Replace Thermostat
1404-001447
could be suspect
Samsung Electronics