The circuit composition than the other five systems are complex

Usually pay attention to when replacing the toner to waste toner waste toner compartment in clean, so as not to affect output. Because the accumulation of too much waste toner, the first will be a "powder leakage" phenomenon, that is, on the output of the comp (usually vertical) irregular black spots, black block, if it does not continue to be excluded from use, over a period of time in "powder leakage" at the bottom ash would be a serious (and there are vertical scratches).
DC control system is mainly used to coordinate and control the printer's work between the various systems: the system receives data from the interface, the drive control laser scanning unit, test sensors, control AC and DC distribution, over-voltage / under current protection, energy saving mode, the control high-voltage distribution. The circuit composition than the other five systems are complex, involving some of the professional knowledge of the circuit, such as amplifier, the feedback circuit, the rectifier circuit, is the maintenance of a storm. Printer and computer interface system is connected to the bridge, which is responsible for the computer to pass data over a certain format, translated into DC board can handle the format and passed to the DC board. Constitutes a general interface system has three parts: the interface circuit, CPU, BIOS circuit. In the interface circuit are mainly responsible for producing some of the current regulator chip (for the protection and drive other chips). CPU main task is to translate the interface circuit to pass over the data, control signals and passed to the DC board translated data. Some printer models, the interface circuit also made into the CPU, like HP4L/4P. This part of the main BIOS printer circuit some of the configuration itself, as well as manufacturers of some relevant information. However, some printer interface circuit of the system and no BIOS can not print printer is generally self-testers, such as Wenjie 280, Epson 5700/5800 and so on, and we usually only limited to the maintenance interface interface circuit.  Laser is to produce high energy, focus precisely, a certain penetration of monochromatic light, the role of human tissues and locally produced high heat to achieve the removal or destruction of the target organization's purpose, laser pulses of different wavelengths to treat the types of vascular and pigmented skin, such as nevus of Ota, port wine stains, freckles, age spots, telangiectasia, as well as to tattoo, eye line, eyebrow, scar treatment, etc.The structure is shown in photo printing engine, which includes a laser scanner, the reflector, drum, toner cartridges, thermal transfer paper feed unit and institutions of several major components. From a functional structure, laser printers print engine and print controller is divided into 2 parts. Laser printers print engine from Canon, Minolta, Xerox, Brother, Samsung, Hitachi and other manufacturers offer a few engines. The printer manufacturers are tailored to the engine manufacturer to purchase or print engine controller according to engine design and print drivers to complete the printer's design and production. This is the form the field of laser printers print engine and print the whole two reasons for the market. Laser printer is the most important component drum, that organic image transmission organizations (referred to as OPC), the entire printing process is to drum center, again and again to the action. Black and white laser printers work can be said that the whole process of charging, exposure, imaging, transfer images, fusing, clear, and in addition to the seven steps of the cycle as such. Printers are peripheral devices, requiring cooperation with the computer to print. In the non-network environment, usually between the printer and computer through a printer cable connection, this cable is connected to one end of the cable to the printer interface, and the other end connected to the computer's printer port, such as LPT1.