Konica-Minolta bizhub C450

Error Code:

Code: C2551
Description: Abnormally low toner density detected Cyan TCR Sensor
• T/C 0.21 % or less is detected ten consecutive times in the Developing Unit as validated through the toner replenishing amount determination control.
Remedy: 1 Perform image troubleshooting procedure if image density is low. 2 Clean the TCR Sensor window on the underside of the Imaging Unit if dirty 3 Correct the TCR Sensor spring moving part if faulty. 4 Clean the TCR Sensor LED if dirty. 5 Change TCR Sensor C/M/Y. 6 M3, M4 operation check PWB-MC PJ8MC-1 to 4 PWB-MC PJ8MC-5 to 8. 7 Change Imaging Unit. 8 Change PWB-MC. 9 Change PWB-MFPC.

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