9/11/14 Objectives:

1. 9/11/14 Objectives: To disassemble and assemble a desktop computer. To identify specific components within a computer case http://www.hudl.com/jobs/

2. Parts is Parts A brief overview of the computer and its components

3. The OUTSIDE/FRONT • Power button – no comment • Floppy Drive – 3.5 (used to be the only way to transfer files between PC’s). • CD-ROM drives- Accepts/reads/copies • Power and Hard disk light – no comment

5. The OUTSIDE/BACK • Fan vent – draws in air and cools components • Power cord connector – three prong • Voltage switch – 115V or 200V if you are living in Europe (Big Ben, Parliament) • Power supply – what we call the above three • Removable panel – normally for another fan

7. PORTS-Built-ins and Expansions • Keyboard port- AT vs. ATX system determines the size of the plug. ATX = PS/2 port. • Mouse port – commonly PS/2 • USB ports – Universal Serial Bus cables. • Serial ports – 9-pin male D-sub connectors. Archaic! • Parallel port – 25-pin female D-sub connector. Mostly used for printers • Sound connectors – Some built in some Exp. • Joystick connector – 15 pin female D-sub • Network – RJ-45 connector

10. And now we take the cover off! Prepare yourself for a little dust – feel free to use the air compressor to clean it. Take an iPad picture of the inside

11. INSIDE – The MOTHERBOARD • Sometimes called main board, system board, and planar board • Power supply connector –ATX uses single connector, AT has two with six pins. Lets unhook these from the components. • Built-in ports – ATX vs. AT • CPU – That thing got a HEMI!! Does the math calculations (millions per second) • Battery – constant power • Expansion Slots – AGP is brown or gray. PCI’s are white, ISA slots are black • RAM – (Random Access Memory) – mini curcuits • Drive connectors – Ribbon cables run from the drives to the motherboard, and connect into a set of pins. Lets take those off right now

13. Central Processing Unit • PGA (pin grid array) and (SEC) Single Edge Contact. The type you need depends on the type of motherboard you have • PGA – Flat on top and many pins on the bottom • SEC – Mounted on a circuit board and then the circuit board is encased in a plastic cartridge. • Cooling device – fan or heat sinks

14. PGA • SEC Cooling Fan

15. RAM – Random Access Memory • Short-term storage for the PC while it processes data • Keeps track of what programs/files are open • What appears on screen • Very fast but volatile • Looks like a small rectangular circuit board about 5 inches. • DIMM or SIMM

17. DRIVES • CD-ROM, Floppy, hard disks are all nonvolatile storage. • All have two connectors on the back, one for power/one for data

18. Expansion Boards • Modems, network interface cards, sound cards, and video cards. • Interacts with the motherboard according to the conventions of the type of slot into which it plugs. (called an expansion bus)

19. Power Supply • Computers require 3V to 12V Direct Current. • Takes in electricity from wall, converts it, and sends appropriate voltages to each device attached to it. • Each different colored wire supplies a different voltage or performs a unique monitoring or management task. (Ex. Red wires supply +5v, and all black wires are for grounding purposes. Other voltages include +12v, -12v, -5v, and +3.3v