Have changed three of the toner colors however continue to have K Toner is at end of life
SOURCE: toner end life
There are silver wire contacts on the left and right that are spring-loaded and touch on copper tabs on the cartridge. They may not be making proper contact. Wiping with some contact cleaner ona cloth may help, or failing that try brightening the surfaces with some fine Scotchbrite pad to help them make proper contact.
SOURCE: Toner problems with Konica Minolta 2450
very annoying message i agree - most likely caused by toner dust.
The printer uses a carousel to rotate the toner cartridges. Dust and toner can easily spill as the cartridges rotate. The error can appear at any time but seems to be most annoying after a paper jam or other error. It is also important to make sure that the cartridges themselves are clear of toner dust. Pay particulair attention to any copper contacts on the cartridge.
http://www.zinetic.co.uk/toner_refill/magicolor-sensor-errors.aspx
SOURCE: Hello, I just replaced my K toner in a Konica
Hello,
it's probably fault in K toner chip. Try with new toner.
Hope that helps!
SOURCE: Konica Minolta 1690 MF printer
Hi there,
A lot of the new Printer/Multifunctional/Fax Machines nowadays come out with only demo Toner/Cartridges which are not completely full so there average yield is very low. The average yield for your Toner Cartridges should be around 2500 Pages but this is a measurement when you basically print in draft and with toner saving on. The moment you start using colours more intensely the yield will drop drastically.
Regards,
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