information sheet 1

7/30/2019 Information Sheet 1

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Information Sheet 1.1-2

LO: Plan and Prepare for Installation

Objective: After reading the information sheet, the trainee must be able to

identify the different parts of the computer in 30 minutes.

Computer Parts

There are many parts that work together to make a computer work.

Computer Hardware - Physical parts of the computer, including processorand memory chips, input/output devices, tapes, disks, modems, cable, etc.

The Processing Unit

The CPU The chip or chips thatinterpret and execute program

instructions and manage the functions ofinput, output, and storage devices.

Computer Case - Contains the majorcomponents of the computer. It helpsprotect them.


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Front of thecomputer case

Inside of the

computercase

Monitor - A display

screen to provide outputto the user. It is whereyou view the information

your are working on.

Video Card - Connectsthe computer to themonitor. It is a circuitboard attached to themotherboard that

contains the memory another circuitry necessary

to send information to th

Keyboard - Used to enterinformation into thecomputer and for givingcommands


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Mouse - An input device operated by rolling

its ball across a flat surface. The mouse isused to control the on-screen pointer bypointing and clicking, double-clicking, ordragging objects on the screen.

The drive that plays CDs and readsdata that has been stored on the

CD.

Compact DiskA type ofoptical storage device.

Floppy disk drive - A device that

holds a removable floppy disk whenin use; read/write heads read andwrite data to the diskette.

Hard disk - Magnetic storagedevice in the computer.


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Random Access Memory - RAM is a computerstemporary memory, which exists as chips onthe motherboard near the CPU. It stores data

or programs while they are being used andrequires power.

Printer - An output device that

produces a hard copy onpaper. It gives information tothe user in printed form.

Barcode Reader - An input device thatconverts a pattern of printed bars intoa number that a computer can read.They are often used by businesses toquickly input price and product

information.

Scanner - A devicethat allows pictures tobe placed into acomputer.


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Microphone - Allows the user to

record sounds as input to theircomputer.

Speakers - Used to generate or

reproduce voice, music, andother sounds.

Sound Card - Connects thespeakers and microphone tothe computer.

Network Card - A circuitboard that connects thecomputer to the rest of thenetwork usually using


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Information Sheet 1.1-2A


Objective: After reading the information sheet, the trainee must be able to

identify the different parts of the computer in 30 minutes.

Computer Parts

Disk Operating System - This software connects the hardware with theprograms you want to run.

MS-DOS:

Microsoft DOS (Disk Operating System) is a command line user interface.MS-DOS 1.0 was released in 1981 for IBM computers.

Microsoft Windows [Version 6.1.7601]Copyright (c) 2009 Microsoft Corporation. All rights

reserved.

C:\Users\user>dir/wVolume in drive C is S3A9972D007Volume Serial Number is 24EA-6D60

Directory of C:\Users\user

[.] [..] [Contacts] [Desktop] [Documents][Downloads] [Favorites] [IRENE] [Links] [Music][Pictures] [Saved Games] [Searches] [Videos]0 File(s) 0 bytes14 Dir(s) 133,523,095,552 bytes free

C:\Users\user>

SOFTWARE - Programs thattell the computer what to do.

It provides instructions thatthe CPU will need to carry

out.


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Example of Windows (GUI) Graphics User Interface

A family of operating systemsdeveloped and produced by MicrosoftCorp. It provides a software graphicaluser interface (GUI) used on IBM and

compatible computers.


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Objective: Given a computer case, the trainee must be able to identify thecasing

style and the different parts of the computer case in 30 minutes.

The Block Diagram

A computer can process data, pictures, sound and graphics. They cansolve highly complicated problems quickly and accurately.

Input Unit:

Computers need to receive data and instruction in order to solve anyproblem. Therefore we need to input the data and instructions into thecomputers. The input unit consists of one or more input devices. Keyboard is

the one of the most commonly used input device. Other commonly used inputdevices are the mouse, floppy disk drive, magnetic tape, etc. All the input

devices perform the following functions.

converted data to the computer system for further processing.

Storage Unit:


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The storage unit of the computer holds data and instructions that areentered through the input unit, before they are processed. It preserves the

intermediate and final results before these are sent to the output devices. Italso saves the data for the later use. The various storage devices of a computer

system

are divided into two categories.

1. Primary Storage: Stores and provides very fast. This memory isgenerally used to hold the program being currently executed in the computer,the data being received from the input unit, the intermediate and final resultsof the program. The primary memory is temporary in nature. The data is lost,when the computer is switched off. In order to store the data permanently, thedata has to be transferred to the secondary memory. The cost of the primarystorage is more compared to the secondary storage. Therefore most computershave limited primary storage

capacity.

2. Secondary Storage: Secondary storage is used like an archive. It storesseveral programs, documents, data bases etc. The programs that you run onthe computer are first transferred to the primary memory before it is actually

run. Whenever the results are saved, again they get stored in the secondarymemory. The secondary memory is slower and cheaper than the primarymemory. Some of the commonly used secondary memory devices are Harddisk, CD, etc.,

Memory Size:

All digital computers use the binary system, i.e. 0s and 1s. Each character ora number is represented by an 8 bit code.

The set of8 bits is called a byte.A character occupies 1 byte space.A numeric occupies 2 byte space.Byte is the space occupied in the memory.

The size of the primary storage is specified in KB (Kilobytes) or MB (Megabyte).

One KB is equal to 1024 bytes and one MB is equal to 1000KB. The size of theprimary storage in a typical PC usually starts at 16MB. PCs having 32 MB,

48MB, 128 MB, 256MB memory are quite common.

Output Unit:

The output unit of a computer provides the information and results of acomputation to outside world. Printers, Visual Display Unit (VDU) are the


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commonly used output devices. Other commonly used output devices arefloppy disk drive, hard disk drive, and magnetic tape drive.

Arithmetic Logical Unit:

All calculations are performed in the Arithmetic Logic Unit (ALU) of thecomputer. It also does comparison and takes decision. The ALU can performbasic operations such as addition, subtraction, multiplication, division, etc anddoes logic operations viz, >,


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Objective: Given a computer case, the trainee must be able to identify the

casingstyle and the different parts of the computer case in 30 minutes.

Computer Cases

There are two basic styles of cases the computer may come assembled in.They are basically tower and desktop style cases.

1. Desktop style is in the shape of a rectangular box, that sets flat on adesk. Usually the computer monitor is placed on top of it.

2. A tower case, looks similar to a tower as the name says. These computerswill be placed off to the side of the keyboard and monitor. The tower caseis the most popular style of desktop computer today. It is alsorecommended by some microprocessor manufacturers since it can be

designed for better heat dissipation. Tower cases come in several sizeswhich are:

Full-tower - The largest. Usually this is a very tall case and you may have adifficult time fitting it where overhead is limited. This case is usually used forhigh powered servers.

Mini-tower - The smallest.

Mid-tower - The standardsize, recommended for most

applications includingstandard desktop systemsand some servers.


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Pin - A part of a connector that extends outward to extend into and makecontact with a socket. Referred to as the male side of a connector.

Socket - a part of a connector that contains an internal contact to receivethe extended side (pin) of a connector. Referred to as the female side of aconnector

Jack - A receptacle where power of signal connectors may be pluggedinto. These are usually on the case of a computer or the motherboardand are made to receive plugs from devices such as keyboards.

Plug - The part that connects with the jack, which comes from akeyboard, mouse, monitor or other device. This is the side associatedwith a cable.


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Information Sheet 1.1-4A


Objective: Given a computer case, the trainee must be able to identify the

casing style and the different parts of the computer case in 30 minutes.

The Front Panel

1. Coverlatch release - Use this latch to remove the cover.2. CD or DVD activity light - The drive light is on when the computerreads data from the CD or DVD drive.3. CD or DVD eject button - Press to eject a disc from the CD or DVD

drive.

4. Floppy drive bay - Can contain an optional floppy drive.5. FlexBay - Can contain an optional floppy drive or optional Media

Card Reader.6. IEEE 1394 connector (optional) - Use the optional IEEE 1394

connector for high-speed data devices such as digital video camerasand external storage devices.

7. Vents - For adequate cooling, do not block any of the vents.NOTICE: Do not use the vents as handles; doing so may result indamage to your computer. Also, ensure that there is a minimum of

two inches of space between all vents and any object near these vents.8. USB 2.0 connectors (2) - Use the front USB connectors for devices

that you connect occasionally, such as joysticks or cameras. It isrecommended that you use the back USB connectors for devices thattypically remain connected, such as printers, keyboards, and mice, orfor bootable USB devices, which may not function properly if attached


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to the front connectors.9. power button - Press to turn on the computer.10.hard-drive activity light - he hard drive activity light is on when the

computer reads data from or writes data to the hard drive. The light

might also be on when a device such as a CD player is operating.

11.diagnostic lights (4) - Use the lights to help you troubleshoot acomputer problem based on the diagnostic code.

12.headphone connector - Use the headphone connector to attach

headphones.

13.microphone connector - Use the microphone connector to attach apersonal computer microphone for voice or musical input into a sound or

telephony program.

14.Service Tag - Used to identify your computer when you access theDell Support website or call technical support.


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1 powerconnector

Insert the power cable.

2 sound cardconnectors(5)

Line-in connectorUse the blue line-in connectorto attach a record/playback device such as acassette player, CD player, or VCR.

Line-out connectorUse the green line-outconnector to attach headphones and most speakers

with integrated amplifiers.

Microphone connectorUse the pink microphoneconnector to attach a personal computermicrophone for voice or musical input into a soundor telephony program.

Surround connectorUse the black surroundconnector to attach multichannel-capable speakers.

Center/subwoofer (Center/LFE) connectorUsethe yellow subwoofer connector to attach multiplespeakers.

3 network

connector

To attach your computer to a network or broadband

device, connect one end of a network cable to either anetwork port or your network or broadband device.

Connect the other end of the network cable to the networkconnector on your computer. A click indicates that thenetwork cable has been securely attached.

NOTE: Do not plug a telephone cable into the network


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connector.

On computers with a network connector card, use the

connector on the card.

4 USB 2.0connectors(5)

Use the back USB connectors for devices that typicallyremain connected, such as printers, keyboards, and mice,or for bootable USB devices which may not functionproperly if attached to the front connectors (see "SystemSetup" for more information on booting to a USB device)

It is recommended that you use the front USB connectorsfor devices that you connect occasionally, such asjoysticks or cameras.

5 card slots (6) Access connectors for any installed PCI or PCI Expresscard

Information Sheet 1.1-4B


Objective: Given a computer case, the trainee must be able to remove the

computer case according to standard in 30 minutes.

Removing CPU Case

Safety First

Before opening the case of your PC, disconnectthe power supply. It is also advisable to unpluganything else from the computer, including anynetwork connections.

Separate PanelsThis type of tower case is usually opened by removing 2 or 3 screws on each

side of the back of the case (see fig 1.1). When you have removed the screwsyou will be able to slide the panels back to release them from the chassis of thecase (see fig 1.2
http://support.dell.com/support/edocs/systems/xps400/sm/syssetup.htm#wp1043338http://support.dell.com/support/edocs/systems/xps400/sm/syssetup.htm#wp1043338http://support.dell.com/support/edocs/systems/xps400/sm/syssetup.htm#wp1043338http://support.dell.com/support/edocs/systems/xps400/sm/syssetup.htm#wp1043338http://support.dell.com/support/edocs/systems/xps400/sm/syssetup.htm#wp1043338http://support.dell.com/support/edocs/systems/xps400/sm/syssetup.htm#wp1043338


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Single SleeveThis type of case is opened by removing 4 or 6 screws (depending on case) fromthe back, in a similar position to those in fig 1.1. When all of the fixing screwsare removed, slide the whole sleeve backwards, you may have to lift the back

end of the sleeve slightly.

Desktop CasesThe most common desktop case is opened by removing 2 screws from each sideof the case, and around 3 from the back of the case. Then slide the coverbackwards, you may have to lift the back end of the cover slightly to remove it.
http://www.helpwithpcs.com/buy-guides/desktop-computers.htmlhttp://www.helpwithpcs.com/buy-guides/desktop-computers.html