Toshiba E-STUDIO900 Manuel d'utilisateur télécharger pdf (Page 65)

PTM 2-40 B070/B071

2.5.4 DRUM CHARGE

Overview

This copier uses a double corona wire Scorotron system to charge the drum. Because

of the high speed of this copier, two corona wires are needed to give a sufficient,

uniform negative charge to the drum surface. The stainless steel grid plate makes the

corona charge uniform and controls the amount of negative charge on the drum

surface by applying a negative voltage to the grid.

The CBG (Charge, Bias, Grid) power pack [A] supplies a constant corona current to

the corona wires, –1600

A for Photo mode and –1400

A for all other modes (Text,

Text/Photo, Pale, Generation Copy).

The voltage to the grid plate is automatically controlled to maintain the correct image

density in response to changes in drum potential caused by dirt on the grid plate and

charge corona casing. This is described in Process Control section in more detail.

B070D203.WMF

[A]

1 2 ... 60 61 62 63 64 65 66 67 68 69 70 ... 223 224

Pas de commentaire

Toshiba E-STUDIO900 Manuel d'utilisateur Page 65