Samsung ProXpress M453x series Service Manual page 140

4. Troubleshooting
► Error Code
C3–1312
► Error message
Imaging Unit Failure: #C3-1312. Install imaging unit again.
► Symptom
Toner sensor is defective. The machine can't detect the sensor signal in the imaging unit normally.
► Troubleshooting method
1) Install the genuine samsung imaging unit.
2) If the imaging unit is already installed, check the following.
• Reinstall the toner cartridge and imaging unit.
• Check if the CRUM connector is normal.
• Turn the machine off then on.
► Error Code
C3–1411
C3–1414
► Error message
Imaging Unit Failure: #C3-1330. Install imaging unit again.
Imaging unit is not installed. Install the unit
Imaging Unit Failure: #C3-1414. Install imaging unit again.
► Symptom
The imaging unit is not installed properly.
► Troubleshooting method
1) Open the front cover.
2) If the imaging unit is not installed, install it. Try to test the machine again.
3) If the imaging unit is installed, remove it. Check if the modular jack is contaminated or broken.
4) Clean the modular jack or replace the imaging unit.
5) If it is OK, check the imaging unit connector on the main board.
6) If the harness is defective, replace it.
7) Turn the machine off then on. Try to test the machine.
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