Sharp MX-4100N Service Manual page 475
Digital full color multifunctional system
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Also See for MX-4100N:
- Operation manual (903 pages) ,
- Quick start manual (120 pages) ,
- Software setup manual (44 pages)
Table of Contents
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: Oct. 24 2008
1
Signal name
1
DM_C
C drum motor
DM_K
BK drum motor
DM_M
M drum motor
DM_Y
Y drum motor
DHPD_C
C phase detection
DHPD_K
BK phase detection
DHPD_M
M phase detection
DHPD_Y
Y phase detection
DL
Discharge lamp (Y,M,C,BK)
MC
Main charger (Y,M,C,K)
GB
Grid (Y,M,C,K)
No.
1
OPC drum (Y,M,C,K)
2
Cleaning blade
2.
Operational descriptions
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.
Name
Drives the C drum.
Drives the BK drum.
Drives the M drum.
Drives the Y drum.
Detects the C phase.
Detects the BK phase.
Detects the M phase.
Detects the Y phase.
Light is radiated to the discharge lamp to discharge the OPC drum surface.
The OPC drum surface is charged negatively.
The OPC drum surface potential is controlled.
Name
Latent electrostatic images are formed.
Cleans and remove residual toner from the OPC drum surface.
MX-5001N PHOTOCONDUCTOR SECTION i – 4
Function/Operation
Function/Operation
2)
Laser lights are radiated to the OPC drum surface by the laser
(writing) unit to form latent electrostatic images.
Laser beams
When laser lights are radiated to the OPC drum CGL, negative
and positive charges are generated.
Positive charges generated on the CGL are attracted by the
negative charges on the OPC drum surface. On the other
hand, negative charges are attracted by the positive charges in
the aluminum 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 laser 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.
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