What is the advantage of separate drum/toner cartridge arrangement?
1. In the arrangement used by HP, for example where the toner cartridge and drum are combined, if the drum is scratched, or otherwise damaged, the cartridge is ruined. That’s the end; it must be replaced. In arrangement used by Brother, however, it is possible to fix the drum. Should a splotch appear, it’s possible to wipe it off and even vacuum out the drum, if necessary. 2. Sometimes when a cartridge is about to run out of toner, for example, it burps out a little extra toner. Because you can separate the drum from the cartridge, it’s possible to clean this up instead of just throwing out the whole cartridge before it’s really worn out. 3. Another advantage is being able to remove pieces of paper that get stuck inside the drum should a paper jam occur.