Toner End Detection

The TD sensor detects toner near end.

If the difference between the TD sensor output and the target value is equal to or larger than the near end threshold, the machine detects that a “possible” toner near end exists. As the machine continues to operate, it starts to calculate an integrated value. If the integrated value is equal to or larger than the near end total threshold, the machine determines that a “true” toner near end exists. The toner near end indicator blinks on the operation panel at this time.

If the difference between the TD sensor output and the target value is less than the near end threshold twice in a row, the toner near end indicator is turned off.

If the difference between the TD sensor output and the target is equal to or larger than the end threshold, the machine detects that a “possible” toner end exists. As the machine continues to operate, it starts to calculate an integrated value. If the integrated value is equal or larger than the toner end total threshold, the machine determines that a “true” toner end exists.