Unit 7 Output Devices Task 1 KEYBOARD

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Unit 7 Output Devices Task 1

KEYBOARD Keep this directly in front of you and within easy reach.

MONITOR SCREEN Keep this level with your eyes. Don’t have it level with the desk. Make sure it is flickerfree, and that you can read everything easily. Avoid any glare from the window.

LAMP Make sure this lights your work and not the screen.

COPYHOLDER Don’t get a stiff neck. Use this when you enter a lot of data.

CHAIR This should be adjustable and provide good back support.

FOOTREST Use this if your feet do not rest flat on the floor.

PRINTER This should be more than a metre away from you and as quiet as possible.

Task 2 Printers Type Print quality Speed Dotmatrix Low Slow Inkjet Better Laser Best Relatively slow Fast Running costs Noise level Price Colour Cheap Noisy Cheap No Expensive Quiet A bit more Good Less Quiet Twice much Great

Task 4 How to read a monitor ad Twenty-two inches is a common monitor size. F A dot pitch of 0. 31 mm is better than one of 0. 25 mm. F A maximum resolution of 1600 x 1200 is better than 1280 x 1024. T A refresh rate of 85 Hz is better than one of 75 Hz. T A 17 -inch monitor is 17 inches wide. F You can change the picture using controls on the screen. T The price of a monitor depends only on the size. F The monitor uses less power because of the Power-Saver feature. T

Price The price mainly depends on the screen size. Common monitor sizes are 14 -inch, 15 -inch, 17 -inch, and 21 -inch. The price also depends on aperture grill pitch, resolution, and the number of controls. Screen size The size of the screen is the diagonal distance from one corner to another. The actual area for images is smaller than this. Aperture grill pitch The controls the space between the dots which make up the image. The less space between the dots, the better the display. Most monitors offer 0. 28 mm dot pitch but some go as high as 0. 31 mm or as low as 0. 25 mm. Maximum resolution The quality of the display depends on the number of dots which make up the image. The more dots, the better the display.

Refresh rate The monitor refreshes the image on the screen all the time. The faster this happens, the less the screen flickers. You should have a refresh rate of at least 72 Hz. Safety standards These are international standards to control harmful signal. Power-saving feature The power the monitor uses automatically reduces when it is not in use. On-screen menu Digital controls on the screen allow you to adjust the image.

To choose a printer Do you need to print on multi-part forms ? YES Buy a dot-matrix printer. NO Do you need to print in colour ? YES NO NO Buy a colour laser Inkjet printer. Are print speed or quality important ? NO Buy a mono inkjet printer. Do you need a fast printer? YES Buy a mono laser printer. YES Buy a colour laser printer.

Kingdom of Saudi Arabia General Organization For Technical Education and Vocational Training College of Technology At Madina Munawara Teacher Mohammad Al-Najdi By : Moaz Marghoob Abdulelah Mohd. Hasan Husen

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