Siricinco Semiconductor

Brief introduction of the scheme

The principle of laser printers is mainly based on electrophotographic technology. Laser printers are widely used in daily life. Sirinko has launched a low-cost design solution for the motherboard of black and white laser printers. This solution supports high-speed USB to receive and process print data through a high-performance MCU processor, and controls and drives LSU, fuser, transfer roller, developer roller, charging roller, stepper motor and other devices to achieve laser printing. Compared with motherboards of other similar products on the market, PCBA has a small size and reduced component materials, which effectively reduces customers 'material costs. In addition, we also provide corresponding computer printer drivers, eliminating the cost of further developing computer printer drivers for customers. It provides favorable support for customers to quickly launch their own brands.

working principle

Laser printer imaging requires seven steps: paper feeding, charging, laser irradiation, development, transfer, fixing, and cleaning to complete output.

System architecture

Technical parameters

● Printing method: laser printing ● Print type: black and white ● Maximum format: A4 wide (210mm) ● Print resolution: 600DPI ● Print speed: 14ppm ● Paper shortage detection: support ● Open lid detection: support ● Paper jam detection: support ● Covered functions: None ● Connection method: USB 2.0 high speed ● Computer driver: support

Step 1: Move the paper

The printer's pickup wheel sends paper onto the paper path, and other devices ensure that the paper moves normally in the paper path, allow the paper to be accurately transferred and finally fixed.

Step 2: Charging

When the printer receives a print job, it charges the charging roller shaft in the toner cartridge. After the charging roller comes into contact with the photosensitive drum, it removes the residual charge attached to the surface of the photosensitive drum and uniformly charges the surface of the photosensitive drum with a negative charge.

Step 3: Laser irradiation

When the printer receives a print job, the laser emitter will emit laser light to illuminate the photosensitive drum. The illuminated part of the photosensitive drum surface will become a conductor, and the accompanying negative charge will be guided away, carrying a positive charge and forming a latent image of the printed content.

Step 4: Develop

The developer roller absorbs the toner in the toner bin, and the developer blade evenly smears the toner on the developer roller into a thin layer. HP original toner is negatively charged. As the developer roller and photosensitive drum rotate, the negatively charged toner is adsorbed to the positive-charged latent image position on the photosensitive drum. (Opposite charges attract each other)

Step 5: Transfer printing

In the toner cartridge, the transfer roller carries a positive charge. When the paper passes through the transfer roller and is pressed by the transfer roller, it will carry a strong positive charge and absorb the negatively charged carbon powder on the photosensitive drum to form a real image.

Step 6: Fixing

The toner on the paper is heated and melted by the heating component, and is fixed on the paper through the resin in the toner, making the toner more firmly fixed and difficult to fall off.

Step 7: Cleaning

After printing is completed, residual toner and charge on the photosensitive drum will clean the photosensitive drum to avoid affecting the next printing.