Samsung SCX 4500 User Manual (ENGLISH) - Page 55

12 Glossary Control Panel A control panel is a flat area where control or monitoring instruments are displayed. They are typically found in top or front of the machine. Coverage This is the printing term used for toner usage measurement on printing and generally used as 5% coverage. 5% coverage means that an A4 sided paper has about 5% image or text on it. So, if the paper or original has complicated images or lots of text on it, the coverage will be over 5% and at the same time, toner usage will be as much as the coverage. Default The first set values. DPI This is the measurement of resolution which is used for printing or scanning. Generally, more dots per inch result in a higher resolution, more visible detail in the image, and a larger file size. Duty Cycle Duty cycle is the page quantity which does not affect printer performance for a month. Generally the printer has the lifespan limitation such as pages per year. The lifespan means the average capacity of print-outs, usually within the warranty period. For example, if the duty cycle is 48,000 pages per month assuming 20 working days, a printer limits 2,400 pages a day, which is not small amount. Fuser Unit This is the part of a laser printer that melts the toner onto the print media. It consists of two hot rollers. After toner is transferred onto the paper, the fuser unit applies heat and pressure to ensure that the toner stays on the paper permanently, which is why paper is warm when it comes out of a laser printer. Grayscale Shades of gray that represent light and dark portions of an image when color images are converted to grayscale; colors are represented by various shades of gray. Halftone This is an image type that simulates grayscale by varying the number of dots. Highly colored areas consist of a large number of dots, while lighter areas consist of a smaller number of dots. ISO The International Organization for Standardization (ISO) is an international standard-setting body composed of representatives from national standards bodies. It produces world-wide industrial and commercial standards. LED A light-emitting diode (LED) is a semiconductor device that indicates the status of a machine. Print Media Media such as papers, labels, and transparencies which can be used on a printer, a scanner, a fax or, a copier. OPC Drum A mechanism that makes a virtual image for print using a laser beam emitted from a laser printer, and it is usually green or gray-colored and cylinder-shaped. An exposing unit of a drum is slowly worn away by its usage of the printer, and it should be replaced appropriately since it becomes scratched from grit in paper. PDF Portable Document Format (PDF) is a proprietary file format developed by Adobe Systems for representing two-dimensional documents in a device-independent and resolution-independent format. PPM Pages Per Minute. PPM shows the printer's speed, how many pages a printer can actually print per minute. PRN file An interface for a device driver, this allows software to interact with the device driver using standard input/output system calls, which simplifies many tasks. Resolution The sharpness of an image, measured in dots per inch (dpi). The higher the dpi, the greater the resolution. Toner cartridge It is a kind of bottle within a machine like a printer which contains toner. Toner is a powder used in laser printers and photocopiers which forms the text and images on the printed paper. Toner can be melted by the heat of the fuser, causing it to bind to the fibers in the paper. URL Uniform Resource Locator (URL) is the global address of documents and resources on the Internet. The first part of the address indicates what protocol to use, the second part specifies the IP address or the domain name where the resource is located. USB Universal serial bus (USB) is a standard that was developed by the USB Implementers Forum, Inc., to connect computers and peripherals. Unlike the parallel port, USB is designed to concurrently connect a single computer USB port to multiple peripherals. 12.1