Does the printer make a swath of the printheads, then pause for 10-15 seconds before the next swath? This is caused by the failure of one of your cartridges. I do not know if the PSC 1210v supports printing in ink backup mode, but try the following: remove the black cartridge and print a test page. Does the printer print at normal speed? Is so the black cartridge was the issue and should be replaced. If not then put the black cartridge back in and remove the color cartridge and print test page. If the printer now prints normal speed the color cartridge was at fault and needs to be replaced.