Remaining Toner Level Monitoring - Printronix L5000 Series Maintenance Manual

Remaining Toner Level Monitoring

The toner empty sensors piezoelectric oscillator is embedded in the side of the
developing unit toner hopper. While toner particles are in contact with the detection
surface, this oscillator does not vibrate. However, if nothing is in contact with the
detection surface due to toner level decrease in the hopper, the oscillator begins to
vibrate, causing the printer to sense that the remaining toner level is too low.
Controller
Control panel
5–52
Principles of Operation