Panasonic UF-580 Service Manual page 192

TONER & INFO CODE 041" and the machine is disabled from printing any copies.
The Toner Cartridge consists of OPC Drum, Bias Charge Roller, Development Roller, Developing
Blade, Cleaning Blade, Mixing Blades and Toner Waste Box. The OPC Drum is an aluminum cylinder
coated with an OPC (Organic Photo Conductor) sensitive material. This surface is photoelectric (retains
the charge in the dark and releases the charge in the light). The potential differences on the surface (a
static latent image) form a printed image. The Bias Charge Roller provides a uniform charge on the
OPC Drum surface. The Development Roller supplies toner to the drum by rotating over the magnet.
The Developing Blade evens the toner on the Development Roller surface and also charges the toner
by friction. The Cleaning Blade cleans by scraping the remaining toner off the OPC Drum surface after
transfer.
Transfer and Separation
As the paper is fed between the OPC Drum and the Bias Transfer Roller (BTR) (604), a positive charge
of approximately +3.0 µA steady current is applied to the backside of the paper by the BTR. The toner
particles are attracted away from the drum towards the surface of the paper. During cleaning, the BTR is
charged to approximately -1500 VDC to repel toner on the OPC Drum and prevent toner from being
attracted to the BTR. After transfer has occurred, the paper passes over the Discharge Plate (612) in
the Transfer Guide (601), reducing the difference of potential between the OPC Drum and the paper.
The stiffness of the paper causes the paper to separate from the drum.
Cleaning
After transfer, some toner may remain on the surface of the OPC Drum. A Cleaning Blade scrapes the
OPC Drum surface, and the removed toner is moved into the Toner Waste Box, inside the Toner
Cartridge.
Laser Unit
LD PCB
Laser Diode
Laser
A 5 mW Laser Diode, with a wave length of 780 nm (±20 nm), provides a modulated beam controlled by
nVIDEO. The beam power on the drum surface is approximately 0.15 mW, and is controlled by the
Beam Detection
Sensor Bean Detection Lens
Collimator Lens Aperture Cylindrical Lens
192
F Lens
Laser Housing
Tetragon Mirror
Tetragon Motor