Problems with photocopiers can occur even with high-quality machines and proper use. Over time, the machines wear and require maintenance and repair. The key to these problems is to know when you can fix them yourself and when you need to call a service technician. Paper jams, lines on the page or dark/light copies are problems you can fix, in most cases. There are other problems that are more technical and in-depth.
Figure out the problem plaguing your copier. In some cases, you will see the problem on the papers printing from the machine. In other cases, an error will show up on the screen.
Call a technician if you cannot find the problem or if you cannot solve the problem. It could be that your photocopier has a difficult-to-fix mechanical problem. If you do not have experience with photocopier mechanics, you should not try to pull the machine apart yourself.