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gang1110
03-06-2011, 05:55 PM
i got error code in c550 c2557 problem with the tcr value in black image . i check the tcr

value its standing on 4.5% and after copule of paper there is error code . i try to supply

toner to the image and after that the tcr shows 7% its good but again after we print

the error code show again c2557 and the tcr show 4.5% . the iu black new and i try to

replace nothing change maybe there is problem with the hooper maybe its fake or problem

with the motor of toner supply?

ddude
03-07-2011, 02:36 AM
There is a problem with the IU working it's way loose, which can cause loss of bias and CQ problems, maybe causing toner errors- Check you image unit for any damage to the drum?

gang1110
03-07-2011, 05:39 PM
i check with another unit is the same problem

CraigW
03-08-2011, 02:00 PM
Is the K image unit holding plate mod being used on this machine ??

Zeldaman
03-10-2011, 12:40 PM
Hi there!
Had the same problem some month ago, the problem was not enough tonersupply caused by a bad sealing of the tonercartridge. Installed anew one-OK.
Greetings..

gang1110
03-12-2011, 04:32 PM
the problem was found i replace the hopper of the black iu thank for everybody

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