Toner Sensor - Panasonic KX-MB2230JT Service Manual

6.12.14. Toner Sensor

This sensor detects whether toner is present.
If the time of IC300-AC25pin's Low level is under 0.45s, 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.
Toner full
Near Empty Toner
Mixing Paddle does not rotate
State
-
TONER LOW
CHANGE TONER
KX-MB2230JT/ KX-MB2270JT/ KX-MB2515JT/ KX-MB2545JT/ KX-MB2575JT/ DP-MB310JT
Display
Low level<0.45s
Low level>0.45s
High or Low level fix
75
Signal (IC300-AC25pin)