How to set system to print in color

SOURCE: skewed printing

Most probably you have to do the Color Registration Settings and the Color Calibration.
The Color Registration will fix the fuzzy printing and the Color Calibration the way how the colors looks. The Color Calibration it is done automatically after each batch of 40 or 80 pages and if you need you can do a manual Color Calibration BUT THE COLOR REGISTRATION must be done manually.

Go to Menu->Others->Service->Color Registration and print a test chart. Will print a page and you have to read the alignment of some lines Cyan Magenta Yellow Black with some numbers. Check the Advanced user guide for details. Basically you have to read the number / letters of each color where 2 lines are matching. Then you can enter those numbers into the printer for each color.

If the Cyan only is off then will be easy ...

SOURCE: CS 1820 color scan quality issues

hi 
try and scan the doc to your p.c first. If this is ok print the doc on your colour printer.
each brand of machine uses different ways to get colours, and yours do not match 

SOURCE: my printer is flaking.

If by "flaking" you mean that the print is rubbing or flaking off then there are 2 possibilities. If you are using thicker than standard 20lb bond paper then when setting up the print job make sure you are selecting thick paper on your paper setting. This is a common problem if your paper is thicker, shiny or anything other than standard.
The other possibility would be a fuser defect of some type. But that would tend to affect standard black and white prints as well.
Try the thick paper setting as it will slow down the paper speed thru the fuser and will "fix" the toner to the paper better.

SOURCE: will not print in black

Replace the black cartridge.