Savin SDC103A Service Manual download pdf (Page 154)

100

101

6.2.6 Development Bias

The high voltage supply board [A] applies the development bias (ac and dc)

to the development roller [B] that is currently in position through the bias

terminal [C].

The development roller is composed of the roller, development sleeve, and

magnet shaft [E]. When the development roller rotates, the development

roller and sleeve rotate, but the magnet shaft does not. (If the magnet shaft

were to rotate, toner could spill which would get into the contact between it

and the bias terminal.) The bias terminal has a spring [F] which pushes it

against the magnet shaft to prevent a poor terminal contact condition when it

reaches the development position.

While the development unit rotates, dc bias is applied from the high voltage

supply board. When the development roller is about to contact the bias

terminal, this dc bias prevents any toner which could have been dislodged

during gear meshing, from being attracted to the drum (see also section

6.2.5: Drive Mechanism).

[C]

[D]

[E]

[B]

[A]

[F]

[E]

[D]

Detailed

Section

Descriptions

DEVELOPMENT UNIT

SM 2-85 A166/A187/A189

CÓPIA NÃO CONTROLADA

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Savin SDC103A Service Manual Page 154

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