Toner Replenishing Mechanism - Konica Minolta magicolor 4690MF Service Manual

Theory of operation Ver. 1.0 May 2008
9.3.3

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 toner cartridge to the print 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 print unit is being driven. This is because of the following
reason: if toner is supplied from the toner cartridge while the print unit remains station-
ary, toner stagnates at the print unit.
Direction of rotation
Toner supply
(as viewed from above of motor
motor
Forward (clockwise)
/Y, /M (M6)
Backward (counterclockwise)
Forward (clockwise)
/C, /K (M7)
Backward (counterclockwise)
When the motor turns forward
Toner supply motor (M6)
Y
Y/C one-way clutch turns.
Toner supply (Agitating blade/conveyance screw)
Y
shaft)
Turned
Stationary
Stationary
Stationary
C
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9. Toner supply section
M
Stationary Stationary
Turned Stationary
Stationary Turned
Stationary Stationary
When the motor turns backward
Toner supply motor (M7)
M
M/K one-way clutch turns.
C K
Stationary
Stationary
Stationary
Turned
K
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