Panasonic KX-P4430 Laser Toner Printer Cartridges & Supplies
If you still have the Panasonic KX-P4430 printer and need laser toner, you might want to consider upgrading to a new printer instead.
Toner Cartridges for the Panasonic KX-P4430
Many consumers are worried if the use of compatible or aftermarket printing supplies will void their printer's warranty. The answer is no.
More simply put, this means that your printer warranty cannot be voided just because you choose to use compatible products unless the manufacturer can prove that the compatible product caused direct damage to your printer. In cases such as this, the manufacturer may choose not to repair your printer but your warranty would remain in effect for all other warranty issues.
For more information see:
MAGNUSON-MOSS WARRANTY
IMPROVEMENT ACT
United States Code Annotated
Chapter 50 Consumer Product Warranties
15 Section 2302 Section C