The waste toner bottle full sensor is at the top of the waste toner bottle. When the waste toner in the bottle has reached approximately 90%, the sensor lifts up a feeler, and an actuator blocks the waste toner bottle full sensor. After sensor detection, the remaining number of days of use is decremented from 18 by the pixel counter.

Full detection flow
  1. When waste toner reaches approximately 90% of the bottle capacity, the full sensor switches ON.
  2. When the waste toner bottle full sensor switches ON, the days remaining counter is decremented from 18 (days).
  3. Days remaining counter: At 15 days to go, a Supply Call is given.
  4. Days remaining counter: At 5 days to go, a control panel message (Waste toner bottle is nearly full. Please contact service department.) is displayed. (Nearly full)
  5. Days remaining counter: At 0 days to go, a control panel warning is displayed, and the machine stops.


  • The days remaining counter starts counting when a new bottle is detected, and displays the days remaining, whose upper limit is 255 and lower limit is 18, until the waste toner bottle full sensor is first switched ON.
    After the full sensor is first switched ON, the days remaining is counted (upper limit is 18)
  • When the bottle is replaced before the machine detects a full waste toner bottle and stops printing, it is necessary to reset PM counters manually (SP3-701-142).
  • When the bottle is replaced after the machine stopped due to detecting a full waste toner bottle, it is not necessary to reset PM counters. If the counters are reset, the replace counter will count up twice.

  • When the days remaining counter reaches 18 days before the bottle full sensor first switches ON: The days remaining counter stops counting when the counter reaches 18 (days). Then, after the waste toner bottle full sensor detects ON, it restarts counting from 18 (days).

  • When the bottle full sensor switches ON before the days remaining counter reaches 18 days: When the waste toner bottle full sensor detects ON, the days remaining counter is reset to 18 (days) and starts counting from there.

SP descriptions
  • SP3-701-142 (Manual New Unit Set: Waste Toner Bottle)

    Enables/disables the new unit detection function. When this function is ON, the machine automatically resets the PM counter when a new unit is detected.