Konica Minolta bizhub c650 Service Manual page 102

Theory of Operation Ver. 8.0 Jun. 2008
F. Control of toner replenishment to the developing unit
• Toner, which has been supplied from the toner cartridge to the sub hopper, is replen-
ished to the developing unit by the toner supply motors that independently operate for Y,
M, C, and K
• T/C is detected when the developing clutch/K is energized for K or when the color devel-
oping motor is energized for C, M, and Y.
• Based on T/C ratio detected by the TRC sensor and amount of consumption calculated
by the dot counter, toner replenishing time (amount) is determined.
• When the machine determines the toner replenishing, sometime it detects the toner
amount that surpasses the maximum volume for one replenishing control. If it is not pos-
sible to replenish the supply of the required amount of toner within this maximum replen-
ishing time, the reminder time is stored in memory and added to the replenishing time for
the next replenishing sequence.
Toner supply motors/
Y,M,C,K (M9,10,11,12)
Agitating seat
13. Toner supply section
Toner empty sensor/Y,M,C,K
(PZS/C, PZS/M, PZS/Y, PZS/K)
conveying screws
A00JT2C097DA
67