When making copies, only a part of the document prints; the rest is solid black.

Try resetting word to factory settings to clear all the settings, Then make a new document and type whatever you want with the font size you require, save then print, see what happens.

Printing from system is OK? Do scan and check.not proper ? check CCD unit & cable..
Suspecting 80% CCD unit(Unit under flat bed glass moves while scan or copy with lamp)
20% cable(flat ribbon cable connected between CCD unit & Formatter) see the snap shot for easy recognition of CCD

Double printing or double feed??. Double printing means document printed in 2 copies. Double feed means printer feed double paper in one moment. For double printing,please check number of copy of document in printing preference properties.
Double feed occurs when pickup roller fails to pick the paper correctly. It's usually caused by shaft of paper pick up roller which is broken. You should replace drive assembly (include pick up roller) in this case

try copying the document to your computer and then from computer take a print out.

1.replace the cartridge.
2. check PCB board contacts
3. replace PCB board

Unfortunately, your C3180 printer needs some repairs done to it or you . A section of the printing arm that does the printing is faulty. This happened to me and apart from replacing the arm (at considerable cost) I purchased a new printer at a much cheaper cost. You can use your faulty printer for printing from the computer but not for copying or scanning. MG

Their should be a Black Copy button and a Color Copy  Button . When wanting to copy a document in color you must choose the color start button.. Good Luck

does this happen though the document feeder or on the main glass if printing was fine then black cartridge and drum are ok its the scanner roller replaced or there something causing a problem

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/normanj_7893313f0751935f

The scanner lamp is not working. When making a copy, the lamp lights the source document, so if there is no light, the source document 'looks' black. Your machine will need to be serviced.

I'm having the same problem, with the black strip printing on the back of each copy i make... Its very annoying. the circlular lil rubber piece that helps the paper feed out of the machine is wet with black ink. theres about 5 lil rubber things that feed the paper out and ONLY one of those seems to be wet with black ink, so everytime i print, it appears on the opposite side of my document. If someone knows how to fiz this problem, PLEASE PLEASE get in contact with me. My name is Maria M. and you can reach me by e-mail [email protected]
Thanks
Maria M