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Re: C-2451 on bizhub c450
C2451: New Transfer Cleaner Unit resetting failure
1. Turn OFF the Main Power Switch. 2. Turn Main Power Switch
ON while pressing the Utility/Counter key. 3. Touch [Trouble
Reset]. 4. Check to make sure that [OK] is displayed and the
it has been reset. 5. After turning off the Main Power
Switch, turn it on again more than 10 seconds after and check if the machine
Reset your Toners and
Imaging units for Minolta Bizhub and CF series. http://www.chipreset.eu
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Konica-Minolta bizhub C253 Trouble Error Codes List page 4
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.
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
Release new transfer belt unit
• A new installation is not detected when a new transfer cleaner unit (image transfer belt unit) is installed.
1 Reinstall unit. 2 Check there is a short circuit in the fuse of the transfer belt unit. 3 Check the PRCB connector for proper connection and correct as necessary. 4 Change PRCB
IDC sensors are located under the transfer belt on the right sid eof the machine. Belt must be removed to clean sensors. Once belt is removed sensors are located on a black plastic frame and have slideable covers that can be moved by hand to clean sensors. There are 2 sensors one machine front and one machine rear.
The yellow and magenta image units may be the problem. Yellow may have worn out on one end causing the yellow line. If the pink dots show up on every page but move around from page to page, there may be damage to the magenta image unit. You can remove the image units from the machine and look at the drums (long green cylinders), this should be shiny and clean. If not, you may need to replace.
What error code. Toner sensor's are usually at the far end of the Toner Cartridge. It will have what looks like a connection, silver or bronze wire, or a chip look thing, if it is dirty it can cause error codes as it is not making contact with in the machine.
C-2451 - When the developing motor/Y (M20) is ON, the maximum detection value of TCR sensor/Y (TCRS/Y) is the specified value and the difference between the maximum detection value and the minimum detection value is over the specified value.