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Konica-Minolta bizhub C253 Trouble Error Codes List page 4
Code C2556
Abnormally high toner density detected yellow TCR sensor
• TC ratio in the developing machine, which is determined by toner replenishing amount control mechanism, is 11 % or more for a given number of times consecutively. • When the connector of the TCR sensor is disconnected.
Solution:
1 Reinstall imaging unit. 2 Reinstall toner cartridge. 3 M3, M4 operation check (At this time, IU must be non-installation.). 4 Change imaging unit. 5 Change PRCB
Extract from: http://www.printcopy.info/?l=en&mod=free&chap=erc&brand=Konica-Minolta&model=bizhub%20C253&page=4
See the link below: looks like a cooling fan error code and the fan needs repalcement. You got a GOOD REP oh yeah...
http://www.copytechnet.com/forums/konica-minolta/27391-bizhub-c253-error-c-5370-a.html
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Drum, Transfer Belt and Fusing Unit Firmware Reset - http://www.bizhubreset.com
Drum and Toner Chip Reset - http://www.chipreset.eu
Transfer Belt and Fusing Unit Reset Kit - http://www.resetkit.eu
Konica Minolta Error Codes & Solutions - http://www.kmcodes.com
C 2554 Abnormally high toner density detected Magenta TCR sensor. Clean the TCR sensor window on the underside of the imaging unit if dirty,reinstall imaging unit or change imaging unit.
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