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 approxi3.0
µ
A 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
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
LD PCB
Beam Detection
Sensor
Bean Detection Lens
F Lens
Laser Housing
Tetragon Mirror
Tetragon Motor
Cylindrical Lens
Aperture
Collimator Lens
Laser Diode
Summary of Contents for Facsimile UF-590
Page 17: ...17 1 4 Control Panel For USA and Canada UF 790 UF 780 790 780 ...
Page 18: ...18 For Other Destinations UF 590 UF 580 ...
Page 27: ...27 10 Remove 2 P6A Bushings 316 11 Remove the Eject Roller 303 10 11 ...
Page 33: ...33 11 Remove 2 Screws 4N 12 Remove the Paper Feed Rollers 518 11 12 ...
Page 294: ...294 4 3 2 1 D C B A 1 2 3 4 Drawing Name HVPS 2 4 Model UF 580 590 780 790 ...
Page 295: ...295 4 3 2 1 D C B A 1 2 3 4 Drawing Name HVPS 3 4 Model UF 580 590 780 790 ...
Page 296: ...296 4 3 2 1 D C B A 1 2 3 4 Drawing Name HVPS 4 4 Model UF 580 590 780 790 ...
Page 297: ...297 4 3 2 1 D C B A 1 2 3 4 Drawing Name LVPS 1 1 Model UF 580 590 780 790 ...
Page 298: ...DZZSM00158 ...