Adjunct

Week 4 Lesson Plan Addendum


Device Manager – explain in depth error conditions, codes and resolutions




Device Drivers – small software code that explains to a computer how to talk to a particular device – usually manufacturer specific – XP very good at finding driver for you but 2000 and others do not – driversguide.com or manufacturer or CD’s that come with PC when purchased – explain how as a technician must build a library of all drivers for all devices within your control.


Do lab on device drivers – find, download, install



Basic Electronics - depth


Terminology


Watts - power

Volts – potential to move electrons

Amps – current – flow of electrons

Metal – easily deflected electrons because they have excess in outer orbit

Insulator – hard to move electrons because they absorb electrons


Test Equipment – voltmeter and amp meter


Draw circuit on board with switch


Power measurements


PIE – wattage ratings 250 okay 400 better

Outlet tester

Neutral – white larger pin

Hot – black smaller pin

Ground – green bottom half moon shaped pin



NOTE: voltage in US stays at 110 volts so adding components to a computer must increase the current usage and thusly the wattage of the power supply must increase.


AC – alternating current – George Westinghouse

DC – direct current – Thomas Alva Edison


Mention competition that Edison lost


Surge Suppressors


ESD – static electricity


UPS – Uninterruptible Power Supply

Battery back up systems


Power off split second – what occurs


EMI – Tempest

Testing Power Supplies


Observations made before testing


Any burnt parts or odors?

Everything connected and turned on? Loose cable connections?

Computer plugged in?

All switches turned on?

Wall outlet good?

If fan is not running, turn off computer

Connections to power supply secure?

Cards securely seated?


Using Ohmmeter instructions


Measure voltage – device cables


Red wire – 5 volts

Yellow wire – 12 volts


P8 P9 pin outs


Red +5v

Blue -12v

Yellow +12v

White -5v


P1 pin outs


Pin 1 +12v

  1. +5v

  1. +5v

7 +5v

9 +3.3

11 +5v

12 +5v

13 -5v

19 -12v

20 +3.3v





Note: ATX Power supply must be have remote switch connected to motherboard before power is applied to ATX Power Supply





Test Power Supplies in classroom


Power Management – right mouse click on desktop – properties – screensaver – power  monitor – also can be found in bios



Energy Star