Minolta Di 620 Manual page 101

1155SBM1210A
12-10. 3rd Drawer Paper Level Detecting Mechanism
The amount of paper still available for use, or the paper level, of the Main Tray is
detected using 3rd Drawer Elevator Motor Pulse Sensor and a pulse disk which
detect the speed of 3rd Drawer Elevator Motor.
When 3rd Drawer is Slid in
Counting of the number of pulses is started
when the 3rd Drawer Elevator Motor is ener-
gized (to turn forward) and continues until
the 3rd Drawer Paper Lift-Up Sensor is
blocked ( ).
L
The total number of pulses is translated into
the amount of paper which is shown on the
Touch Panel as a graphic marker in units of
50 sheets of paper.
During Copy Cycle
As the paper is consumed and the top level
of the paper stack lowers, the 3rd Drawer
Elevator Motor is energized (to turn forward)
to raise the paper stack. During this time, the
Scaner Reference Position Sensor detects
pulses and that pulse count is accumulated.
When the count reaches 50 sheets of paper,
one segment of the paper level indicator on
the Touch Panel goes out.
NOTE: If there is paper on the Shift Tray, the
copier detects that 500 sheets or
more of paper are left in the 3rd
Drawer as long as paper is left on the
Main Tray.
CONTROL SIGNAL
M28
CONTROL SIGNAL UNBLOCKED
PC29
PJ2H-6,7B
PJ2H-5A
M-82
*Paper Level Indicator
1 to 50 sheets
50 to 200 sheets
200 to 350 sheets
350 to 500 sheets
500 sheets up
3rd Drawer Elevator
Motor Pulse Sensor (PC29)
3rd Drawer
Elevator
Motor (M28)
ON OFF
L H
BLOCKED
L H
1134M058AA
1134M059AA
1134M060AA
1134M061AA
1134M062AA
Pulse
Disk
4444M050AA
WIRING DIAGRAM
I-25~26
WIRING DIAGRAM
H-25