Imaging Unit - Samsung ML-451 Series Service Manual

2. Product Specifications and Description

2.2.6.2. Imaging Unit

1) Imaging Unit Overview
The imaging unit consists of OPC drum unit and the development unit. The OPC drum unit has an OPC drum, a charge roller
which charges the OPC and cleaning blade. The development unit has a magnetic roller, two mixing augers, developer, a
Dr-blade and a TC (Toner Concentration) sensor.
The diameter of the drum is 30 mm (circumference: about 94.2 mm).
The developing gap between a drum and the corresponding magnetic roller cannot be adjusted because they assembled
as one Imaging unit in the factory.
The cleaning blade removes remaining toner on the drum surface.
The CRUM chip in the image unit stores the data about the Imaging unit.
Mag netic Ro ller
Charg e Ro ller
OP C Drum
Cleaning b lad e
Mixing Aug er
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