Development - Epson ColorPage EPL-C8200 Service Manual

EPSON ColorPage EPL-C8200

2.5.7 Development

1. Used Cartridge Sensor
The Used Cartridge Sensor detects whether the toner cartridge is
new or used for the color in each toner cartridge. In the trickle
development method, the used developer is collected in the
collection chamber in the Toner Cartridge. A reflection seal has
been pasted on a wall inside the chamber; when collected and
accumulated in the collection chamber, the used developer covers
the reflection seal. The Used Cartridge Sensor is a reflection type
photo sensor. If it detects a reflected light from the Toner Cartridges
for each color, it determines that the used developer has not filled
up the collection box, meaning that the Toner Cartridge is still new.
If it does not detect a reflected light from the Toner Cartridge, the
Toner Cartridge is old.
2. Cartridge Sensor
The Cartridge Sensor is a reflection type photo sensor. It detects a
reflection light from the Toner Cartridges. If it detects a reflected
light, it determines that the Toner Cartridge has been mounted. If it
does not detect a reflected light, it determines that the Toner
Cartridge has not been mounted.
3. Rotary Sensor
The Rotary Sensor detects the home position of the Rotary Frame
Assembly. The Developer control is done based on the home
position.
(For more details, see "7.8 Developer Control.")
4. Developer Assembly Y, Developer Assembly M, Developer
Assembly C, Developer Assembly Bk
The major components of each of these Developer Assemblies (Y,
M, C and Bk) are the Augers, Magnet Roll, Trimmer Blade and
Tracking Roll.
Chapter 2 Operating Principles
(a) The three Augers in the Developer Assembly:
• Supplies toner from the Toner Cartridge to the Developer
Assembly.
• Agitates the developer in the Developer Assembly.
• Supplies the developer from the Developer Assembly to the
Magnet Roll.
(b) The Magnet Roll has the following functions:
• Attracts the carrier particles.
• Forms an even developer layer.
• Supplies toner to the drum.
(c) The Trimmer Blade is positioned so that a gap is maintained
between the Magnet Roll and the Trimmer Blade; it forms an
even developer layer on the Magnet Roll.
(d) The Tracking Roll maintains a gap between the drum and the
Magnet Roll.
5. The Toner Cartridges (Y, M, C and Bk) have toner (including
carriers) and collect the used developer (carriers).
Revision A
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