MX-3114N OPERATIONAL DESCRIPTIONS 13 – 34
(2) Operational descriptions
The OPC drum surface is negatively charged by the main charger,
then laser image beams are radiated to the OPC drum surface by
the laser (writing) unit to form electrostatic latent 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) Laser beams are radiated to the OPC drum surface by the
laser (writing) unit to form electrostatic latent images.
When laser beams are radiated onto the CGL of the OPC
drum, positive and negative 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 laser beam are not
radiated.
As a result, latent electrostatic images are formed on the OPC
drum surface.
Signal name Name Function/Operation
DHPD_CL OPC drum rotation sensor (CL) Detects rotation and the phase of the OPC drum (CL).
DHPD_K OPC drum rotation sensor (BK) Detects rotation and the phase of the OPC drum (BK).
DL_BK Discharge lamp (K) Discharges electric charges on the OPC drum (K).
DL_C Discharge lamp (C) Discharges electric charges on the OPC drum (C).
DL_M Discharge lamp (M) Discharges electric charges on the OPC drum (M).
DL_Y Discharge lamp (Y) Discharges electric charges on the OPC drum (Y).
DVM_CL Developing motor (CL) Drives the developing/OPC drum section (CL).
DVM_K Developing motor (K) Drives the developing/black OPC drum (BK)/transfer section.
GB (Y, M, C, K) Grid (Y, M, C, K) The OPC drum surface potential is controlled.
GB (K, M, C, Y) Main charger grid voltage (K, M, C, Y) The OPC drum surface charging voltage is controlled.
MC (Y, M, C, K) Main charger (Y, M, C, K) The OPC drum surface is negatively charged.
MC-CL Main charger applying voltage (CL) The main charger is charged to generate negative electric charges.
MC-K Main charger applying voltage (K)
No. Name Function/Operation
1 OPC drum unit (Y, M, C, K) Latent electrostatic images are formed.
2 Cleaning blade (Y, M, C, K) Remaining toner on the OPC drum surface is cleaned.
3 Waste toner transport screw Waste toner in the OPC drum unit is transported to the waste toner collection section.
4 High voltage PWB (MC/DV PWB) Generates the main charger voltage and the DV bias voltage.
Aluminum
layer
OPC drum
CTL
CGL
High voltage unit
Main corona unit
Screen grid
Laser beams
Aluminum
layer
OPC drum
OPC drum
CGL
CTL
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