Question about Konica Minolta bizhub 350 All-In-One Laser Printer
C2557 is the code for ATDC sensor failure. ATDC stands for Automatic Toner Density Control. This code is usually caused by either a sensor failure or more commonly a mismatch in what the machine should have for toner density level and what the sensor is seeing. I have even seen this code pop up if the machne is run low on toner. Bad news is it is going to require service. This may require a drum and developer change to resolve as well. So you will need to call your local service company/guy and get it repaired.
Good Luck and Thank You for using Fixya.
Posted on Aug 06, 2010
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Posted on Jan 02, 2017
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