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Biz hub C252

Error code C2551

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I have found that if you don't use make a lot of color copies the toner can bind up in the cartridge. Pull out the cyan toner, shake it up and tap on it, and reinstall into copier. This has fixed 99% of problems with this error code and the others related to TCR sensors for colors. If it is a new toner make sure the black gear didn't fall off of the back of the cartridge.

Posted on May 12, 2010

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YOU CAN RE-TONE THE MACHINE BY ENTERING SERVICE MODE SELECTING IMAGE PROCESS ADJUSTMENT AND TCR SUPPLY SELECT THE COLOUR THAT IS DEFICIENT AND RUN THE SUPPLY JUST ONCE. BEFORE YOU DO THIS CHECK THAT THE SEALING STRIP ON THE TONERS HAS COME AWAY AND NOT STUCK OVER THE HOLE HENCE STARVING THE MACHINE OF TONER.

Posted on Jul 27, 2009

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C2551 Abnormally low toner density
detected cyan TCR sensor
• TC ratio in the developing machine, which is
determined by toner replenishing amount control
mechanism, is 5 % or less for a given number of
times consecutively.


Posted on Apr 21, 2009

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Biz Hub C250 - code error C2551


Ahhh, you must be the same Macdaniel I emailed for clarification a short while ago.
C2551 relates to the Cyan imaging unit, the machine thinks the toner level inside the Cyan imaging unit is low.
Opening and shutting the main front door is the reset procedure. However if this doesn't work you should try the following
Remove the Cyan imaging unit, give it a bit of a shake and then refit.
Experience tells me that the above only works on occasion and you will probably require a new imaging unit. They are available for around £250.
Please be aware that the fault could also be down to a circuit board being defective, but this is less common.
Regards
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