Specifications

<Toner Empty Detecting Control>
= Detection Control =
•
A toner-empty condition of the Sub Hopper is detected by the output
from Sub Hopper Toner Empty Switch S8 while the Developing Unit
remains energized (PC Drum Drive Motor M5 remains energized).
S8 is actuated.
A LOW Sub Hopper Toner Empty signal is input to pin 99 of IC4A.
Main Hopper Toner Replenishing Motor M14 is energized to turn the
Toner Bottle one turn, thereby supplying toner from the Main Hopper.
(See p. M-85.)
The Toner Bottle is turned one turn at a time to supply toner to the Sub
Hopper until the Sub Hopper Toner Empty signal being input to pin 99 of
IC4A remains HIGH for a continuous 2-sec. period.
The above operation is repeated and, if the signal does not go HIGH even
after 16 turns of the Toner Bottle, the Toner Bottle will not be turned the
next time.
The copier CPU determines that it is a toner-empty condition and gives a
toner-empty message on the Touch Panel.
Master Board PWB-A
1075T185CA
OFF
PC Drum Drive
Motor (M5)
TT T
T : Time for One Turn
of Toner Bottle
Toner Empty Detected
ON
OFF
Sub Hopper Toner
Empty Switch (S8)
ON
OFF
Main Hopper Toner
Replenishing Motor (M14)
ON
Approx. 1.6 sec.
Toner Bottle is Turned 16 Turns.
M-83