17 January, 2003 DEVELOPMENT
6-49
Detailed
Descriptions
Shutter Mechanism
The development unit and toner attraction pump each have a shutter mechanism.
When the development unit is placed in the machine, the protrusion [A] on the
development unit opens the shutter [B] in the pump, and the protrusion [C] on the
pump opens the shutter [D] in the development unit. When both shutters are open,
toner can enter the development unit from the toner attraction pump.
When the development unit is removed, the shutter spring [E and F] pulls and
closes the shutter.
6.5.7 TONER CARTRIDGE DETECTION
The memory chip [A] on each toner cartridge
stores the total “on” time of the toner supply
clutch. This is used to calculate the amount of
toner remaining in the toner cartridge. The chip
is also used to detect whether the cartridge is
installed (if the cartridge is not installed, the
machine does not detect a signal from the
memory chip).
G080D959.WMF
G080D960.WMF
[A]
[B]
[C]
[D]
[E]
[F]
[A]
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