Cartridge problem of the fax.

please replace with new original cartridge to solve this problem.

ok..let's start with this step

go here, get a fresh set of drivers, and remove old s/w, then install the new set

Does the machine print anything? such as a directory or print when making a copy? I rather suspect it does not. When an incoming fax is recvd does the paper get pulled in and come out blank? If so your problem is with printing (or lack of it). Perform head cleaning. Also make sure the black cartridge still does not have its deal stuck on it. Post again if you still have problem.

This means that your fax is only storing into its internal memory and not printing all incoming faxes, therefore it has no more space for more incoming documents, you should print the documents and maybe you'll need to clear the memory, depending on fax machine, this is done automatically when the documents are printed, and of course, set the incoming faxes to print not to store, this feature is supposed to be used only when the fax has no paper to print.

Try this step ... found it on Canon's website

Issue: ERROR LCD: WAITING FOR REPORT
Solution: Set [AUTO PRINT RX] to ON (MX300 / MX310)

AUTO PRINT RX When [AUTO PRINT RX] is set to [OFF], incoming received faxes will be temporarily stored to memory and transaction reports (TX, RX and Activity) remain in memory. The default setting is [ON], which means incoming received faxes and transaction reports will automatically print. The fax machine will not automatically print a received fax and will store it in memory in the following conditions.

• Ink is low or has run out
• The paper size and type is not set correctly
• Paper has run out
• The Output Tray is closed

To set AUTO PRINT to ON, please follow these steps.

1. Press the <FAX> button to enter the Fax menu.
   
   
2. Press the <Menu> button. [FAX SETTINGS] is displayed
   
   
3. Press the left or right arrow button to select [RX SETTINGS] , then press <OK> two times.
   
   
4. Press the left arrow to select [ON], then press <OK>.
   
   Note: When AUTO PRINT RX is set ON, a sub-menu will appear to PRINT WHEN NO INK.
   
   
5. At sub-menu PRINT WHEN NO INK, decide if you'd like the machine to continue to print incoming received faxes if ink is low.
   
   CAUTION: When this option is set ON, the fax machine will not monitor the ink level of the ink cartridges. If ink is low or out, received faxes will print with streaks or blank. Furthermore, once the fax is printed, it will be deleted from memory.
   
   1. To print received faxes when ink is low or out, press the left or right arrow to select [ON] and then press <OK>.
      
   2. To store received faxes in memory when ink is low or out, press the left or right arrow to select [OFF] and then press <OK>.
      
      
6. Press the <Stop/Reset> repeatedly to return to Fax standby mode.

Even though the toner was shown at 1/2, I had the fax machine operator install a new cartridge. Problem solved!

if there are "empty toner"
the printer not print received fax until cartridge replacement.

Have you tried a new toner cartridge?

Did you pull the plastic tape on the cartridge?

In 3 second make combination on you Samsung 4521F 'Menu'-#-1-9-3-4. You will enter in tech menu. Select 'toner'-new toner-yes. You will receive faxes. It really works.