MX3500N PHOTOCONDUCTOR SECTION i – 2
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.
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.
Signal name
Name
Function/Operation
DMCL
Drum motor (Color)
Color photoconductor drive
DMBK
Drum motor (Black)
Black photoconductor drive
DL
Discharge lamp (Y, M, C, BK)
Light is passed to the discharge lens to drive the OPC drum surface.
MC
Main charge (Y, M, C, K)
The OPC drum surface is charged negatively.
GB
Grid (Y, M, C, K)
The OPC drum surface potential is controlled.
No.
Name
Function/Operation
1
OPC drum (Y, M, C, K)
Latent electrostatic images are formed.
2
Cleaning blade
Residual toner is cleaned and removed from the OPC drum surface.
Aluminum
layer
OPC drum
CTL
CGL
High voltage unit
Main corona unit
Screen grid
LED lights
Aluminum
layer
OPC drum
OPC drum
CGL
CTL
Summary of Contents for MX 3501N - Color Laser - Copier
Page 64: ...MX3500N ADJUSTMENTS 6 19 E F Yellow C D Magenta A B Cyan ...
Page 390: ...MX3500N PHOTOCONDUCTOR SECTION i 7 3 6 7 9 8 10 2 5 7 9 1 4 11 ...
Page 444: ...Memo ...
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