Opc Drum Section; Operational Descriptions - Sharp MX-2300 G Service Manual

Signal name
DMCL Drum motor (Color)
DMBK Drum motor (Black)
DL Discharge lamp (Y, M, C, BK)
MC Main charge (Y, M, C, K)
GB Grid (Y, M, C, K)
No.
1 OPC drum (Y, M, C, K)
2 Cleaning blade

2. Operational descriptions

A. OPC drum section
The OPC drum surface is negatively charged by the main charger.
The laser beam images are radiated to the OPC drum surface by
the laser (writing) unit to form latent electrostatic images.
1) The OPC drum surface is negatively charged by the main
charger.
The main charger grid is provided with the screen grid. The
OPC drum is charged at a voltage virtually same as the volt-
age applied to the screen grid.
2) LED lights are radiated to the OPC drum surface by the laser
(writing) unit to form latent electrostatic images.
When LED lights are radiated to the OPC drum CGL, negative
and positive charges are generated.
Positive charges generated in CGL are attracted to the nega-
tive charges on the OPC drum surface. On the other hand,
negative charges are attracted to positive charges in the alumi-
num layer of the OPC drum.
Therefore, positive charges and negative charges are bal-
anced out on the OPC drum and in the aluminum layer, reduc-
ing positive and negative charges to decrease the OPC drum
surface voltage.
Electric charges remain at a position where LED lights are not
radiated.
Name
Color photoconductor drive
Black photoconductor drive
Light is passed to the discharge lens to drive the OPC drum surface.
The OPC drum surface is charged negatively.
The OPC drum surface potential is controlled.
Name
Latent electrostatic images are formed.
Residual toner is cleaned and removed from the OPC drum surface.
MX-2300/2700 N/G PHOTOCONDUCTOR SECTION i – 2
Function/Operation
Function/Operation
As a result, latent electrostatic images are formed on the OPC
drum surface.
3) After transfer operation, remaining toner is removed by the
cleaning blade.
Toner removed from the OPC drum surface is transported to
the waste toner section by the waste toner transport screw.