Royal blue / navy blue on the screen prints out looking purple

Try cleaning the head with an alcohol swab. It is a thermal printer. It may have paper dust or debris. Parts from Royal in the link.

https://www.google.com/search?q=new+print+head+for+royal+210

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Definately CMYK so you can see which colors are out of gamut. If copies are lousy too, then you might have old supplies in the machine. In service sim mode (type # * C *) go to 64-5 and print the test charts directly from the print engine. You should get one greyscale and one color page. If those look bad, then you need a supply change (drum, developer, or belts). In the driver under Printing preferences you have the option to set color schemes until you find one that works. If you still have trouble, get a new driver from www.sharpusa.com, past that a firmware flash may be necessary.

Since it's a brand new printer it's probably not the printer, but your set up . Not knowing what program you are printing from, I can't advise beyond that 1) check the reference for the program you are printing from about setting up your color to be compatible with your printer (look under color management). Usually it has to do with your file's color profile matching the printer profile.

do you have tape in backwards? one side will print other side will not.

Hi, did you tried to calibrate your colors but on the printer? The printer decides which color it's gonna print, regardless to the color on the screen. He's gonna try most of the time to print the closest color he can make. We call this WYSINWYG. What You See Is Not What You Get. You should have a tool with the HP printing software. Otherwise i guess you can print a test page to check the colors. Make sure each color Cyan/magenta/yellow and black print corectly on the test page. Usally on HP printers you have to hold the Go button 5-10 sec and it's gonna print the test page but refer to your manual if you are not sure how to do this. Could also be a problem with your print heads, check if there is a procedure in the manual to clean those.

Either theyellow is finished or the nozzles are blocked. Try cleaningthe nozzles of the cartridge.

Look at the ribbon. If only the top half is beig printed on then the ribbon lift is out of adjustment or the ribbon is in wrong

make sure u have the latest graphic card installed on ur mac, so that it matches with the compatibility of photoshop cs3

Hi, I have a Royal Companion Portable from 1940's. I bought new ribbons at mytypewriter.com (select the "Royal Portable" ribbon). It fits. Anyway if it doesn't it's not an expensive mistake, but I researched this and apparently all vintage Royal Portables have the same standard ribbon. Worked out in my case. Good luck!