Days Remaining Counter of the Waste Toner Bottle

The replacement time of the PM part can be estimated from the days remaining counter.

Days Remaining Counter

The days remaining counter shows the remaining days until replacement is required for the PM part. The machine calculates the consumption of the PM part from the number of printed sheets and the number of days having passed since the last replacement, and then displays the remaining days in the SP mode. When the waste toner bottle is replaced, the days remaining counter of the waste toner bottle starts counting . The count starts from 255 (days). The days remaining counter of the waste toner bottle can be checked with SP7-951-142.

However, the amount of waste toner accumulated inside the waste toner bottle differs according to the printing conditions, such as the toner coverage of the image. Therefore, the days remaining counter which is calculated from the number of printed sheets is only a reference value. To bring the days remaining counter closer to the actual waste toner bottle condition, the output from the waste toner near full sensor is also used, as follows. Until the waste toner near full sensor detects the near-full state, the days remaining counter counts from 255 to 30 (days). Then the days remaining counter counts from 30 to 0 (days) after the waste toner near full sensor detects the near-full state.

• When the days remaining counter is faster than the actual waste toner bottle status;
  If the waste toner near full sensor does not detect the near-full state when the days remaining counter reaches 30 (days), this means that the days remaining counter is faster than the actual waste toner bottle condition. Therefore, the days remaining counter stops counting when the counter reaches 30 (days). Then, after the waste toner near full sensor detects the near-full state, it restarts counting from 30 (days).
  
  

• When the days remaining counter is slower than the actual waste toner bottle status;
  If the waste toner near full sensor detects the near-full state before the days remaining counter reaches 30 (days), this means that the days remaining counter is slower than the actual waste toner bottle condition. When the waste toner near full sensor detects the near-full state, the days remaining counter is reset to 30 (days) and starts counting from there.
  
  

Operation Control According to Changes in the Days Remaining Counter

The machine does the following based on the value of the days remaining counter.

1. The waste toner bottle is replaced.
2. The days remaining counter starts counting from 255 (days).
3. When the waste toner near full sensor detects the near-full state, the days remaining counter starts counting from 30 (days).
4. When the days remaining counter reaches 15 (days)^*1, an @Remote warning is given (only in the models with @Remote connection).
5. When the days remaining counter reaches 5 (days)^*2, the machine displays the near-full state on the operation panel.
6. When the number of sheets printed from the near-full detection^*3reaches the prescribed number or when the amount of waste toner inside the waste toner bottle accumulated from the near-full detection^*3 reaches the prescribed amount, the machine displays the full state on the operation panel and stops the operation.

*1 This can be changed with SP7-958-142 (PM Value Setting:DaysThreshold).

*2 This can be changed with SP3-800-014 (Waste Toner Full Detection: Threshold : Remainder days).

*3 This 'the near-full detection' means when the waste toner near full sensor detects the near-full state.