Printer Mechanisms
Let’s try to understand printer hardware. The printer hardware can be categorized into three parts: 1. Controller 2. Video Interface 3. Engine Controller Operation Computer sends data to controller board and it converts it into image data. For example when the letter “A” is sent by the computer, controller receive the character code and compares it with its built in font data and decides which image should be printed for the coming signal. After all of the image data of the page has been created inside of the controller, the data is then transmitted to the engine. The controller takes out data from image data for one line then transmits it to the engine through the video interface. The line of data which is taken out is called raster data. The raster data is transmitted to the engine through the video interface. Controller has CPU, Program ROM, Font ROM, Option RAM and smoothing circuit. Also it has an operation unit. Video Interface Video interface has following...