Error Messages - Samsung ML-1665 Service Manual

Code
A3-3112 SMART PANEL:Actuator Sensor Failure #A3-3112:Turn off then on.
C1-1110 SMART PANEL:Prepare new toner cartridge
C1-1120 SMART PANEL:End of life, Replace with new toner cartridge
C1-1130 SMART PANEL:End of life, Replace with new toner cartridge
C1-1411 SMART PANEL:Toner cartridge is not installed. Install the cartridge.
C1-1512 SMART PANEL:Toner cartridge is not compatible. Check users guide
M1-1113 SMART PANEL:Paper jam in tray 1.
M2-1211 SMART PANEL:
S2-4110 SMART PANEL:Door is open. Close it.
SMART PANEL:Fuser Unit Failure : #U1-1211.
U1-1211
Turn off then on.
SMART PANEL:Fuser Unit Failure : #U1-2121.
U1-2121
Turn off then on.
U2-1112 SMART PANEL:LSU Unit Failure: #U2-1112. Turn off then on.
U2-1114 SMART PANEL:LSU Failure: #U2-1114. Turn off then on.
Error message