I replaced the cartridge on my Sharp UX-B750 inkje fax machine and it is giving me a message on the display to change cartridge and will not let me perform any other function.

Replacement cartridge: SHAPR UX-C80B

Your faxes are probably stored in memory. They automatically print when the a) cartridge is installed properly full, b) fax has paper, c) there is no paper jam.

There also may be a "Print Hold" function activated.

1. Press <print hold> [RCV DATA PRINT] will display.
2. Press "Right Arrow" on the <start/memory> button.
3. Enter 4-digit Print Hold code.
4. Press <start/memory>. Printing will begin. If the wrong code is entered [WRONG CODE] will display. Go back to step 3 and start again. Once you've entered the wrong code 3 times, you will return to your standby display.

You have one of these problems:
1. You are out of in and need to replace the print cartridge.
2. You have run out of printing paper.
3. You have a paper jam.

Once the problem is identified and corrected, the fax will automatically print the memory pages.

The machine is not identifying the cartridge properly. Attempt to reinstall the cartridge. It just may be installed incorrectly.

Your reception mode is set to TEL/FAX or TEL mode, to set it to automatically receive faxes it should be set to FAX. Look at the LCD display ( right section ).

To change the reception mode you can print the HELP LIST by pressing COPY/HELP button.

You can also put the machine in serves mode by unplugging the power from the machine, press both the the copy/help and the stop buttons at the same time, hold them and plug back the power until you see TF662B service mode.This also works well with refill cartridges. YJ

I do not know what the error code means but try this http://www.sharpusa.com/global/ContactUsProdSupp/1,1878,,00.html

They should be able to fix your problem

There's some kind of a chip chip in the catridge that notifies the printer that the same cartridge has been refilled. to get around this check keep atleast 2 or 3 empty cartridges, refill and cycle them. That should do the trick!

Plug a regular phone into the wall jack and listen for a dial tone.

Make sure you are plugged into the LINE port of your fax machine.

Do you have DSL phone service?

Did you get any help with this issue? My machine is giving me a "cartridge error"...I can't seem to get it fixed.