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


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