KX-MB2110RUW, KX-MB2130RUW, KX-MB2170RUW, KX-MB2117RUB, KX-MB2137RUB, KX-MB2177RUB - Panasonic Copying Equipment Service Manual (repair manual). Page 61

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KX-MB2110RUW/ KX-MB2130RUW/ KX-MB2170RUW/ KX-MB2117RUB/ KX-MB2137RUB/ KX-MB2177RUB
6.12.8.
Toner Sensor
This sensor detects whether toner is present.
If the time of IC300-AC25pin's Low level is under 0.5sec, there is enough toner in Drum cartridge, if not, toner is near empty.
Toner Sensor
The rest of toner is detected by the move speed of the magnet put on the pendulum of Mixing Paddle. The pendulum is pushed
up by the Mixing Paddle,then it falls down by its own weight. The rotation speed of paddle is set slower than the one of pendu-
lum which falls down by its own weight. When the toner is still left,the pendulum falls and stops on the toner,then pushed by the
paddle,it starts to rotate. When no toner is left,the pendulum falls to the bottom. Consequently the contact time between the
magnet and Magnetic Field sensor IC becomes short when toner is left and long with no toner.
State
Display
Signal
Toner full
-
Low level<0.5sec
Near Empty toner
TONER LOW
Low level>0.5sec
Mixing paddle does not rotate
CHANGE TONER
High or Low level fix
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