Have been using Samsung Label printer SRP 77011since last one year. Of late we have been observing that the print on the labes fade in a few days. What could be the cause and the possible solution for the same. The label being used are still the same

Most likely it is a quality issue with the label you are printing on. As long as the image is printed good initially onto the media(thermal paper), the printer/software portion of it is done.

Thermal paper has a special coating and protective layer to prevent it from fading from exposure to heat, including light. But if the coating is bad then it'll show problesm like you describe

go to applications folder for your computer, dbl click printer icon for make of printer. check settings. print 'test document and clean cartridge heads', this should ensure proper printing formats.

lastly, go to web site of printer model and check site for trouble shooting if this does not work above.
hope this helps and good luck