Do the west drum and carrier scraper of the copier have to be changed together?

Yes, because the selenium drum is very precise (the main component is actually a special belt), it is easy to be damaged when transported alone, and the installation environment has strict requirements on temperature and temperature (usually installed in a separate room with temperature and humidity sensors). The whole assembly consists of many parts, and after-sales maintenance does not have this strength, so it can only be replaced as a whole. There may be some maintenance personnel who will replace them separately, but this cannot guarantee the quality and service life.