Operation; Toner Supply Control When The Toner Level In The Toner Supply Section Gets Reduced - Konica Minolta 7145 Service Manual

TONER SUPPLY/CLEANING/RECYCLE UNIT
Symbol Name
[9] PS5 (Toner bottle sensor)
M1 Main motor
M4 Toner supply motor 1
M10 Toner supply motor 2
SD9 Toner solenoid
5.2

Operation

5.2.1

Toner supply control when the toner level in the toner supply section gets reduced

A. Toner supply operation:
When toner in the toner supply unit is running short, the TLD (Toner level sensor) turns on. This
causes the M10 (Toner supply motor 2) to turn on to rotate the toner bottle and replenish toner to the
toner supply unit. When toner has been supplied, the TLD turns off to monitor the toner level.
B. Operation when toner is not supplied:
When the TLD (Toner level sensor) has been kept turned on for the specified period of time, it is con-
sidered that no toner remains in the toner bottle and a message is displayed on the operation LCD.
C. Toner level detection timing:
The TLD (Toner level sensor) detects at all times the toner level during copy operation.
Function or method
Detection of the setting of the toner bottle
Photosensor
Driving of the toner collection sheet and the collected toner con-
veyance screw
DC brushless motor, PLL control
Driving of the toner conveyance screw and the toner agitator plate
Stepping motor
Toner bottle
Stepping motor
Transmission of driving force from the M4 (Toner supply motor) to
the toner conveyance screw
24VDC drive
2-18