Konica Minolta 5430 DL 5440 DL 5450 - Manual (Page 56)

Main Unit Theory of Operation Toner Cartridge / Hopper
2-19
II Comp
osition
/O
p
eration
4.2.5 Toner replenishing mechanism/control
A. Toner replenishing mechanism
• The Toner Supply Motor is energized according to the condition of the toner level sensor
for each color of toner. Toner is then supplied from the Hopper to the Developing Unit as
necessary.
• A single Toner Supply Motor is turned either forward or backward to accomplish supply of
toner of two different colors (one motor is for Y and M, and the other for C and K). That is,
M (K) toner cannot be supplied while Y (C) toner is being supplied.
• Toner is supplied only while the Developing Unit is being driven. This is because of the
following reason: if toner is supplied from the Hopper while the Developing Unit remains
stationary, toner stagnates at the Developing Unit.
B. Toner replenishing decision control
• Toner replenishing decision control is provided only while the Developing Unit is driven
evenly.
• The machine determines that toner replenishing for the Developing Unit is necessary
when the toner level sensor output value remains below a predetermined value and if the
following event is detected a predetermined number of consecutive times: the output
value of the toner level sensor remains a predetermined value or lower for more than a
predetermined period of time.
• The toner replenishing decision control is interrupted during registration correction and
gamma correction, in which it is not possible to acquire output values of the toner level
sensor.
Toner Supply
Motor
Direction of rotation
(as viewed from above of motor
shaft)
Toner supply (Agitating Blade/Conveyance Screw)
Y M C K
/Y, /M (M6)
Forward (clockwise) Turned Stationary Stationary Stationary
Backward (counterclockwise) Stationary Turned Stationary Stationary
/C, /K (M7)
Forward (clockwise) Stationary Stationary Turned Stationary
Backward (counterclockwise) Stationary Stationary Stationary Turned
4138to2014c0
4138to2013c0
When the motor turns forward When the motor turns backward
Y/C one-way clutch turns. M/K one-way clutch turns.
Y
C
M
K
Toner Supply Motor (M6) Toner Supply Motor (M7)
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