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Text excerpt from page 33 (click to view)
(2) The basic rotation cycle of the toner sensor is as follows:
T time Basic rotation cycle of toner sensor Toner low time Toner full time 2.5 sec. t1 > 0.64 sec. 0.64 sec. > t1 > 0.28 sec.
Opening the stacker cover turns off the microswitch on the high-voltage power supply board to suspend +5 V supply to the high voltage power supply. This results in the stop of all high-voltage outputs. At the same time, the CVOPN signal is issued to notify the main control board of the switch status and cover open processing is executed.