How can a toner cartridge work without a waste powder bin?

As usual, the waste powder box only contains printed waste powder. If you are not afraid of leakage, you can put on a plastic wrap, hehe.

At least all the printers I've seen can work normally. I have never seen the model of waste powder bin with detection circuit, because it is a garbage station, and the printer manufacturer will not design detection circuit to control the garbage station.

HP Special Maintenance Engineer