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5th FOUNDING ANNIVERSARY CELEBRATION Theme: “5 Years of Keeping Abreast With Excellence”

SEMINAR-WORKSHOP ON COMPUTER ASSEMBLY and DISASSEMBLY and BASIC COMPUTER NETWORKING

November 27, 2012

Lecture 1 Lecture on Computer Hardware Servicing Occupational Health and SafetyPolicies and Procedures

1. Turn off the computer before PC Disassembly2. Protect against ESD (Electro-Static Discharge)3. Make notes

4. Keep components away from your hair and clothing5. Keep screws and spacers orderly and in one place, such as a cup or tray6. Do not stock boards on top of each other7. Do not touch the chips on the boards. Hold expansion cards by the edges8. Do not touch the chip with a magnetized screw driver.9. Avoid foods and drinks in the work area10. Do not use a graphite pencil to change DIP switch settings

Guidelines in PC Disassembly The system unit contains the actual computing and interfacing hardware. Manydifferent peripheral devices may be added to the basic system in order to tailor itsoperation for specific users.

1. Remove all external I/O systems. (input and output systems)A. Unplug the computerB. Remove all peripheralsC. Disconnect the mouseD. Disconnect the keyboardE. Disconnect the monitor

2. Remove the systems outer cover.3. Map out the architecture of the PC.4. Store all screws properly in a paper cup.5. Record the orientation of the plugs. Labeling is a good idea. They could

have different voltages. This could damage the system if they are mixed up.6. Remove the power supply unit.7. Record the ribbon cord orientation of the CD-drive.8. Remove the CD-ROM drive9. Record the ribbon cord orientation of the Hard-drive.10. Remove the Hard-drive.11. Detach the front panel switches from the motherboard.12. Remove the system board carefully; do not touch the battery or the jumper

settings. This could throw off the CMOS settings.13. All the components should be laid out on the table in an organized fashion.

PC ASSEMBLY 

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1. Install the system board.2. Connect the systems unit front panel switches and the indicators.3. Make the connections to the hard disk drive unit.4. Make the connections to the CD-ROM drive unit.5. Install the power supply unit.6. Reconnect the basic I/O units to the systems. (Monitor, communication

cables, power plug, keyboard, etc.)7. Check out the system (turn on, note the actions, check the led light)8. Replace the system cover.

Workshop1

PC DisassemblyPC Assembly

Lecture 2 COMPUTER NETWORK 

A computer network is a collection of two or more computers linked together forthe purposes of sharing information, resources, among other things.

Networking can also be defined as:

•

users sharing resources (like printers or files)• across a common medium (like copper wire or fiber optic cable)

• by way of specific rules (like TCP/IP or other network protocols).

NETWORK ARCHITECTURE

Also referred to as the network model, the network architecture is the overallstructure of how a network is laid out.

1. CLIENT/SERVER ARCHITECTURE

• A type of network setup that utilizes both servers and clients.

• A client is a computer that retrieves information from and/or uses resources

provided by a server or main computer.

• A server is a physical computer dedicated to run one or more services toserve the needs of the users of other computers on a network

2. PEER-TO-PEER ARCHITECTUREAlso known as a P2P network , a peer-to-peer network is a network that doesnot have a central computer or dedicated server; in other words, all computers areindependent.

NETWORKING BASICS

LAN. Short for Local-Area Network , a LAN is a network that has networkingequipment and/or computers in close proximity to each other, capable of communicating, sharing resources and sharing information.

MAN. Short for Metropolitan-Area Network , MAN is a network that is utilizedacross multiple buildings.

WAN. Short for Wide Area Network, WAN is a collection of computers andnetwork resources connected via a network over a geographic area.

NETWORKING CABLES

STRAIGHT-THROUGH CABLES get their name from how they are made. Out of 

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the 8 pins that exist on both ends of an Ethernet cable, each pin connects to thesame pin on the opposite side. Review the diagram below for a visual example:

Use a straight-through cable when:

•

1. Connecting a router to a hub• 2. Connecting a computer to a swtich

• 3. Connecting a LAN port to a switch,

hub, or computer

CROSSOVER CABLES are very similar to straight-through cables, except that theyhave pairs of wires that crisscross. This allows for two devices to communicate atthe same time. Unlike straight-through cables, we use crossover cables to connectlike devices. A visual example can be seen below:

Use a crossover cable when:

• 1. Connecting a computer to a router

• 2. Connecting a computer to a

computer

• 3. Connecting a router to a router

• 4. Connecting a switch to a switch

• 5. Connecting a hub to a hub

Workshop2

Making Cross-over CableChanging computer name and workgroupIP ConfigurationFile / Printer Sharing