Panasonic Panafax UF-4000, Руководство по обслуживанию

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negatively charged by the friction between the rotating Development Roller (Mag Roller) and the
Developing Blade. This combination and the rotation of the Mixing Blade transfers the toner from the
reservoir and forms a brush effect on the Mag roller. Where the magnetic brush lightly touches the OPC
Drum, the negatively charged toner is attracted to the latent image on the drum, forming a mirror image
of the original on the drum. Any remaining toner is removed from the Mag Roller by the Developing
Blade and is recycled back into the toner reservoir. A bias voltage of approximately 1.65 kVACp-p at 1.87
kHz, riding on a -430 VDC bias is applied to the magnetic brush to achieve maximum print quality.
The Toner Level Sensor , an optical sensor, detects the remaining quantity of toner in the Toner
Cartridge. When the “TONER” lamp starts to blink, there is still enough toner left in the cartridge to print
100 pages (based on ITU-T Image No.1). When the toner runs out, the display will show: “OUT OF
TONER & INFO CODE 041” and the machine is disabled from printing any copies.
The
Drum Unit consists of OPC Drum, Bias Charge Roller, Development Roller, Developing Blade,
Cleaning Blade and an Auger. The Toner Cartridge consists of Toner hopper 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.