CompTIA A+ Certification Exam Objectives .. GDI graphics device interface. GHz gigahertz. GUI graphical user interface. GPS. The Windows GDI builds the page and then sends it to the printer. A less- sophisticated method of communicating to a printer is to use the GDI (Graphics Device. GDI is actually a Windows component and is not specific to printers. Instead, it’s a series of components that govern how images are presented to both monitors.

Author: Moogulmaran JoJokree
Country: Montserrat
Language: English (Spanish)
Genre: Literature
Published (Last): 11 July 2010
Pages: 211
PDF File Size: 6.91 Mb
ePub File Size: 15.88 Mb
ISBN: 293-7-21955-554-6
Downloads: 70863
Price: Free* [*Free Regsitration Required]
Uploader: Maugul

Every particle on the drum hit by the laser releases most of its negative charge into the drum. Compti printers include this feature built-in,while others require a piece of additional hardware that flips the paper for the printer.

CompTIA A+ Certification Exam Guide, A+ Chapter 27 Printers and Multifunction Devices (1)

Your software must use the proper language when communicating with your printer, in order to output paper documents. Following are the more common printer languages. Although not 3 harmful to humans in small amounts, even tiny concentrations of ozone will cause damage problem to printer components. A laser printer must have enough memory to process an entire page. Postscript Adobe Systems developed the PostScript page description language in the early s as a device-independent printer language capable of high-resolution graphics and scalable fonts.

With binary numbers, each extra bit of information doubts the color detail in the scan. What a printer can and can’t do is largely determined by the type of printer technology it uses that is, how. Another feature of inkjet printers is that they can support a staggering bdi of print media.


Dye-sublimation printers produce high-quality color output that rivals professional photo-lab processing. Pick a particular printer technology and check the price, from the cheapest to the most expensive. More and more homes and home offices are enjoying the benefits of network printing. RET enables the printer to insert smaller dots among the characters, smoothing out the jagged curves that are typical of printers that do not use RET see Figure The enhanced resolution numbers are useless.

Printers that create an image on paper by physically striking an ink cmoptia against the paper’s surface are known as impact printers. How to Choose a Scanner You must consider four primary variables when choosing a scanner: If your color cartridge ran out of one of the colors,you had to purchase a whole new color cartridge or deal with a messy refill kit. Toner The toner in a laser printer is a fine powder made up of plastic particles bonded to pigment particles.

To hear audio for this text, and to learn the vocabulary cimptia up for a cimptia LingQ account. Most of the time these. Higher resolutions produce higher-quality output, but keep in mind that higher resolutions also require more memory. Support in other operating systems varies, but most of them have third-party software available for working with XPS files.

You place a photo or other object face down on the glass called the platenclose the lid, and then.

CompTIA A+ Certification Exam Guide, A+ Chapter 27 Print

Copmtia ink is stored in special small containers called ink cartridges. Printer Languages Now that you’ve learned about the different types of print devices and techniques, it’s time to take a look at how they communicate with the computer.


Printers No other piece of your computer system coptia available in a wider range of styles, configurations, and feature sets than a printer, gid at such a wide price variation. Although you can use an external printer language such as PostScript, most users simply install printer drivers and let Windows do all the work.

This could damage your laser printer and void your warranty ,so make sure you print on transparencies designed for laser printers! Many of these sensors are really tiny switches that detect open doors and so on. Being highly standardized has advantages, but the control codes are extremely limited.

Those particles with a lesser negative charge are positively charged relative to the toner particles and attract them, creating a compfia image see Figure The amount of RAM in your system and to comptai lesser extent, the processor speed dictates how big a file you can handle. At this point, the drivers and other software controlling the scanner pop up, providing an interface with the scanner as shown in Figure The thermal printhead passes over the ribbon and melts the wax onto the paper.