Auxiliary Toner Replenishing Control For Toner Hopper; Control Of Toner Replenishing For Developing Unit - Konica Minolta BizHub C360 Service Manual

Theory of Operation Ver. 1.0 Jul. 2009
12.3.6

Auxiliary toner replenishing control for toner hopper

• If the amount of toner available in the toner hopper is likely to be decreasing, control is
performed to supply toner forcibly from the toner cartridge to the toner hopper.
• The machine prohibits initiation of any new print cycle while the auxiliary toner replenish-
ing control is being executed.
A. Toner hopper auxiliary toner replenishing control execution timing
• The toner cartridge motor is rotated for 15 sec. to supply toner from the toner cartridge to
the toner hopper under any of the following conditions:
"The toner cartridge is replaced with a new one after a toner empty condition is detected
in the toner cartridge (toner empty reset control is performed)"
"The developing unit is replaced with a new one (developing unit new article detection
control is performed)"
B. Toner hopper auxiliary toner replenishing control end timing
• The auxiliary toner replenishing control is terminated under any of the following condi-
tions:
"A 15-sec. period elapses after the toner cartridge motor is started"
"The front door is opened and closed"
"An error or malfunction occurs"
"The machine enters the power save or sleep mode"
12.3.7

Control of toner replenishing for developing unit

• Control of replenishing the developing unit with toner is performed only when the devel-
oping unit is driven.
• The toner replenishing time (the amount of toner supplied) during the toner replenishing
control is determined based on the T/C ratio detected by the TCR sensor (noncontact
magnetic type) and the amount of toner consumed calculated by the dot counter.
• If replenishing is interrupted by a paper misfeed, the front door opened or closed, or any
similar event, the required replenishing time is carried forward to the next replenishing
control sequence.
• For details of the TCR sensor, see "Toner density control" of developing section.
A. Detection timing
• The toner replenishing control is started when the drive of the developing unit is started.
• The toner replenishing time is determined based on the T/C ratio detected by the TCR
sensor and the amount of toner consumed calculated by the dot counter.
• The toner supply motor is rotated for the period of time equivalent to the "toner replenish-
ing time" to thereby replenish the developing unit with toner from the toner hopper.
12. TONER SUPPLY SECTION
97