12-13.Sub Hopper Toner Empty Detecting Mechanism - Minolta Di450 Service Manual

12-13. Sub Hopper Toner Empty Detecting Mechanism
• A magnet and a toner-empty detecting switch detect a toner-empty condition in the Sub
Hopper.
• As toner in the Sub Hopper is consumed, the magnet turns ON the Sub Hopper Toner
Empty Switch. This causes the copier to start a toner replenishing sequence. If the Sub
Hopper Toner Empty Switch remains ON for 2 sec. or more even when the Toner Bottle
has been turned for 60 sec., the copier determines that it is a toner-near-empty condition.
• A toner-empty condition is detected when T/C becomes less than 3% in a toner-near-
empty condition.
Toner Near Empty Detected
Toner Empty Detected
Magnet
Sub Hopper Toner Empty Switch
S4
Toner Empty
S4
The Sub Hopper Toner Empty Switch remains ON for 60 sec-
ond after a toner replenishing sequence has been started.
T/C becomes less than 3% in a toner-near-empty condition.
CONTROL SIGNAL
PWB-A PJ7A-12B
M-44
Detecting Conditions
Sub Hopper Toner
Empty Detecting Lever
Eccentric Cam
4002M539AA
Toner Full
ON OFF
L H
4002M540AA
WIRING DIAGRAM
4 - E