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.

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Today you can find color inkjet printers with six, eight, or more color cartridges. When you click the Print button in an application, several things happen. The RIP takes the digital comptua about fonts and graphics and converts it to a rasterized image made up of dots that can then be printed. Cloud and Remote Printing Blurring the line between traditional and virtual printing, a comptja of applications, such as Google Cloud Print, will install a virtual printer on your system that wraps up your document and sends it out over the Internet or other network to a cloud server, which eventually ends ydi routing it to a real printer for printing all without needing to have a driver installed for it.

The case that holds the print wires is called a printhead.

That’s your first potential bottleneck if it’s a big job, the OS has to dole out a piece at a time and you’ll see the little printer icon in the notification area at the bottom-right of your screen. Copy and Fax Components The scanning and printing capabilities of a multifunction device enable manufacturers to add copy-machine features easily.

Faxing generally requires separate functions in the machine, such as a document feed and a connection to a traditional, analog phone line.

Do not assume that every error with the word memory in it can be fixed simply by adding more RAM to the printer. Using the laser, we can “write” an image onto the drum. Call or check comptka printer manufacturer’s Web site to see what type of RAM you need.

Solid ink printers use just what you’d expect solid inks. The two key features of an inkjet printer are the print resolution-how densely the printer lays down ink on the page and the print speed. 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.


The enhanced resolution numbers are useless. 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. Think printers, copiers, scanners, and fax machines. ASCII actually contains a variety of control codes for transferring data, some of which can be used to control printers. The toner must be melted to the paper to make the image permanent. Assuming you have those and an account with the comptix telecom company, the process of faxing is pretty simple.

Using a process called electrophotographic fdi, laser printers produce high-quality and high-speed output of both text and graphics.

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

As in most such software, you choose File I Create and then select. Although most printer companies will happily sell you their expensive RAM, comptiw printers can use generic DRAM like the kind you use in a computer. The dye-sublimation printing technique is an example of the so-called CMYK cyan, magenta, yellow, black method of vdi printing.

It uses a device compia laser imaging unit to “paint” a raster image on the photosensitive drum. Learn from this text and thousands like it on LingQ. All flatbed scanners, the most common variety of scanner, work the same way. Solid ink sticks do not rely on containers as does ink for inkjet printers and can be “topped off” midway through a print job by inserting additional color sticks without taking the printer offline.

Higher resolutions produce higher-quality output, but keep in mind that higher resolutions also require more memory.

Solid ink printers use solid sticks of non-toxic “ink” that produce more vibrant color than other print methods. More and more homes and home offices are enjoying the benefits of network printing. Printer Languages Now that co,ptia learned about the different types of print devices and techniques, it’s time to take a look at how they communicate with the computer.

This not only was more cost-effective for the user, but it also resulted in higher quality printouts. Some computers are even used cmoptia for the purpose of producing paper documents. The ink is ejected through tiny tubes.


Some printers include this feature built-in,while others require a piece of additional hardware that flips the paper for the printer. Now we turn to the physical side of the printing process. The toner cylinder charges the toner with a negative charge of between and volts. An inkjet printer also has a RIP, but it’s part of the software driver instead of onboard hardware circuitry.

If your comptiia cartridge ran out of one of the colors,you had to purchase a whole new color cartridge or deal with a messy refill kit. Those commands must be supported by each individual printer model, making PCL files less portable than PostScript files. In some cases,the printer uses four separate toner cartridges and four lasers for the four toner colors, and in others the printer simply lays down one color after the other on the same drum,cleaning after each of four passes per page.

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More sophisticated laser printers enable duplex printing, meaning they can print on both sides of the paper. The first is the direct thermal printer, and the other is the thermal wax transfer printer.

We’ll revisit printing in Windows in more detail later in this chapter. Laser The laser acts as the writing mechanism of the printer.

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

Printers that create an image on paper by physically striking an ink ribbon against the paper’s surface are known as impact printers. The scanning software that controls the hardware can manifest in a variety of ways.

Scanners differ a lot in grayscale depth, a number that defines how many shades of gray the scanner can save per pixel. The first laser printers created only monochrome images; you can also buy a color laser printer, but most laser printers produced today are still monochrome.