I have the Canon MF8350Cdn, it has 4 in line toner cartridges and each have an imaging drum, inside the printer there's a large belt below where the cartridge drums are and closing the door lowers the cartridge drums over the belt.
I had assumed the paper passed between the drums on the cartridges and the belt, but I opened the cartridge door while it was printing to see inside and noticed the image was on the transfer belt directly with no paper in between.
So firstly, how do the lasers hit the drums of the cartridges? I don't see any path for light to get from anywhere to the cartridge drums, there's the cartridges above with only the bottom of the drum exposed and the image transfer belt right under, so how can the lasers reach the drums? Or do they not? And if not then how would the image be created without being "projected" onto the drums?
Secondly why does it "print" on the belt and then transfer to paper, why not print directly on paper?
This is the type of printer that's the same speed in color and black and white.
Does the transfer belt have a limited lifespan? Only the cartridges seem to be listed as consumable parts. If it has a limited lifespan can it be replaced in my model? The printer's duty cycle is 40 000 prints per month.
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