MX-3114N OPERATIONAL DESCRIPTIONS 13 – 23
9. Process section
A. General
The process section is composed of the following major devices.
Laser beams generated by the LSU are converted into visible toner images via the OPC drum, the developing unit, and the transfer unit, and
transferred on paper.
The process operations are performed in the following sequence:
Charging - Exposure - Developing - Primary transfer - Secondary transfer
In addition, the process control system is employed to maintain stable print image qualities.
B. Major units and functions
Name Content
OPC drum unit Generates electrostatic latent images with the main charger and the image laser beams.
Toner cartridge Supplies toner to the developing unit with the toner motor.
Developing unit Converts electrostatic latent images on the OPC drum into visible toner images.
Primary transfer unit Transfers toner images on the OPC drum to the primary transfer belt.
Secondary transfer unit Transfers toner images from the primary transfer belt to paper.
Waste toner collection section Collects waste toner generated in the OPC drum section and the transfer section.
Image density sensor (Registration sensor) Detects the toner patch density on the primary transfer belt during operation of the process control
system. Detects the color shift amount.
MC/DV PWB Generates the main charger voltage and the DV bias voltage.
TC PWB Generates the transfer voltage.
Before-transfer charging unit (PTC) Charges toner so as to be easily transferred on paper.
OPC drum
Developing(3)
Exposure (2)
Secondary
transfer (6)
Before-transfer
charging (5)
Primary transfer (4)
Charging (1)
Discharge (7)
Toner cartridge (Y)
Primary transfer unit
Inmate density sensor
Toner cartridge (M)
Toner cartridge (C)
Toner cartridge (BK)
Developing unit (Y)
Developing unit (M)
Developing unit (C)
Developing unit (BK)
OPC drum unit (Y) OPC drum unit (M) OPC drum unit (C) OPC drum unit (BK)
Secondary
transfer unit
Before-transfer
charging unit (PTC)
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