Development
Overview
1. Doctor blade
2. Developer hopper
3. Mixing coil (left)
4. TD sensor
5. Mixing coil (right)
6. Development roller
This machine has four development units, one for each color. The developer in each unit is supplied to the
development roller by the two mixing coils. Electrostatic attraction moves the developer to the surface of
the roller.
The drum positioning plate and the rear shaft set the photoconductor gap between the PCU and
development roller. It is not adjustable in the field.
The TD sensor detects toner density. Each development unit has a TD sensor.
The diameter of the development roller is 18 mm (the circumference is approximately 56.5 mm).
Development
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