Ricoh Aficio AP-4510 G065, Руководство по обслуживанию, Страница: 228 / 278

DEVELOPMENT
G065 6-24 SM
6.1.4 DEVELOPMENT BIAS
Mechanism
Black areas of the latent image are at a
low negative charge (about -150 V) and
white areas are at a high negative
charge (about –950 V).
To attract negatively charged toner to
the black areas of the latent image on
the drum, the high voltage supply board
[A] applies a bias of –540 volts to the
development roller throughout the image
development process. The bias is
applied to the development roller shaft
[B] through the bias terminal spring [C]
and bias terminal [D].
The development bias voltage (–540 V)
can be adjusted with SP2201 (Development Bias).
Correction for Paper Width and Thickness (By-pass Tray only)
The by-pass tray can be used for non-standard paper narrow than sizes accepted
by the paper trays. Thicker paper, OHP sheets, etc. can also be loaded in the by-
pass tray but adjustments must be performed with the SP modes listed below in
order to avoid jams and misfeeds.
SP Mode SP Name
SP2201-01 Development Bias Default: -540 V
SP2309-01 Paper Lower Width [a] Width limit. Default: 150 mm
SP2309-02 Paper Upper Width [b] Width limit. Default: 216 mm
SP2914-03
Process Control Setting (B
γ
)
Adjust 10 V/step. Default 210 V
SP2914-04
Process Control Setting (B
δ
)
Adjust 10 V/step. Default 50 V
The way that these SP modes are used is shown below.
0 mm
SP2309-01
Default: 150 mm
SP2309-02
Default: 216 mm 297 mm
Voltage:
SP2201-01 + SP2914-03
Default: –540 + 200
Voltage:
SP2201-01 + SP2914-04
Default: –540 + 50
Voltage:
SP2201-01
Default: –540
For example, with the default settings, if the paper width fed from the by-pass tray
is 200 mm, the development bias voltage will be –540 + 50 V.
G065D404.WMF
[A]
[B]
[C]
[D]
CÓPIA NÃO CONTROLADA
CÓPIA NÃO CONTROLADA