1. Paper runs out
When the paper runs out, the panel will show an empty paper tray signal, and you can load copy paper. You can continue copying.

2. Insufficient toner
When the toner is insufficient signal light is on, it means that the toner in the machine is almost used up, which will affect the copy quality. It should be replenished in time. Some models will stop running when this signal appears, and some models can continue to copy. Before adding toner, the toner bottle or cylinder should be shaken several times to crush the agglomerated toner into powder.
3. Too much waste toner
The waste toner removed from the photosensitive drum is collected in a waste toner bottle. When it is full, a signal will be displayed on the panel. Some machines use the same signal as insufficient toner, which should be checked more carefully. When the waste toner is full, it should be dumped in time. Some models require that waste toner cannot be reused, especially single-component developing machines, otherwise it will affect the developing quality.