Black Cartridge needs replacement but new cartridge.
Thanks for that. Have sorted problem and got transfer unit installed, but have switched printer back on and now it is telling me that the black catridge needs replacing when I know it is fairly new and nowhere near empty.
Could I have damaged a sensor on replacing the transfer unit as red light on top of printer just flashes, with green light steady.
If you can help in anyway it would be much appreciated.
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Re: Black Cartridge needs replacement but new cartridge.
Just reset the toner cartridge and the machine will se it a new one. Remeber though it may now actually run out of blsack when the machine thinks it is part full. This will give quality issues when it runs low.
If you are not sure on resetting the cart, let me know.
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put that cartridge in and perform a head cleaning process, and allignment... follow the procedure (2 or 3 times if needed) and in the end, shut down the printer, disconnect usb cable (both end), then wait for some time, aprox. 20 sec. and then put both end in again, turn printer on and wait for ready signal or some sort of confirmation that all is ok... If not, replace or update the printer driver and software, or reinstall all printer software.
The 2840 is a slightly different sort of machine when it comes to supplies. There is a main imaging drum unit which works for all four colors, and then there of course are the 4 colors. If the unit was asking for a drum unit then you should have instaled a Q3964A. It is entirely possible that your drum unit and black cartridge both expired at the same time, in which case, you need a black toner cartridge now.
Regarding the Dell A940 "Error 50c"....the user guide doesn't seem to mention "Error 50c". They do, however, mention a "Cartridge Error" on page 52 of the manual. They claim this means that the printer has detected a short circuit (fuse/resister) in the cartridge. As you may or may not have noticed in the manual, this is what they recommend doing about it:
1) Press Power to turn the printer off.
2) Lift the printer cover/lid (scanner unit) until the scanner support holds it open.
3) Turn the printer on. The ink cartridge carrier moves and stops at the loading position unless the printer is busy.
4) Remove the color ink cartridge.
5) Lower the printer (scanner unit) until it is completely closed. If the error message displays again, replace the black cartridge with a new black cartridge.
If the error message does not display, repeat steps 1–3 and then go to step 6.
6) Reinstall the color cartridge and remove the black ink cartridge.
7) Lower the printer (scanner unit) until it is completely closed.
If the error message displays again, replace the color cartridge with a new color cartridge. If there is no error message (indicated by flashing lights), repeat steps 1–3 and then reinstall both ink cartridges. 8) Lower the printer (scanner unit) until it is completely closed.
If you get the error message again, while both cartridges are installed, replace both of the cartridges.
Basically, what they want you to determine is,....if the short circuit is with the "black ink" cartridge or the "color ink" cartridge and then replace the cartridge that has the problem.
It mean that the black cartridge is not recognised. It the black cart is original or compatible? Some printer won't recognise cartridge, if the black and colour is not same type. Try to install the black only. Is it recognised?
Most of the time when I find this happening on a printer, not just Ricoh's it turns out to be the PCU (photo conductor unit). The color PCU is one unit and the black is a seperate unit. Hope this helps.