Kyocera C7990 Waste Toner Box Full
What it means
The waste toner container is full or is not fitted. It is one of the easier codes to deal with: fit a new container, or refit the existing one properly, and the printer carries on. Do not empty and reuse the container, since the sensor and the seal are part of it.
A full step-by-step guide is on the way
We publish guides only after checking each step against the manufacturer's own documentation, so this one is still being written. In the meantime, if the code relates to a jam or an obstruction, switching the printer off, unplugging it for a minute, and checking for anything stuck resolves a large share of cases. For a hardware fault, contact the manufacturer.
Official Kyocera supportDifferent code or problem?
Switch off and unplug a printer before reaching inside it. If a fault involves the power supply or internal electronics, or the machine is under warranty, contact the manufacturer or a qualified technician. Full disclaimer. Brand and code names are trademarks of their owners; PrinterFixUp is independent and unaffiliated.