Samsung ML-451 Series Service Manual page 147

► Error Code
C3–1330
► Error message
Imaging Unit Failure: #C3-1330. 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 CN22 harness connection on the main board.
6) If the harness is defective, replace it.
7) Turn the machine off then on. Try to test the machine.
► Error Code
C3–1512
► Error message
Imaging unit is not compatible. Check users guide.
► Symptom
Imaging unit is not compatible.
► Troubleshooting method
Install the genuine samsung imaging unit.
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4. Alignment and Troubleshooting
4-46