Lab 4 CSYS - Practical assignments of CSYS course. PDF

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Summary

Practical assignments of CSYS course....

Description

Lab 4 – Multimeter + PSU Replacement Part 01: Test voltages on connectors of a power supply unit  Describe the two methods of checking a Power Supply Unit using a multimeter.  We can test the Power Supply Unit when it is disconnected from the motherboard and other PC components,  We can do a live test with the Power Supply Unit connected to all devices in the PC.

 Main 24 pin P1 Connector Wire Color

What reading it should be

What your reading is

Orange

+3.3V

+3.379V

Orange

+3.3V

+3.379V

Red

+5V

+5.03V

Red

+5V

+5.03V

Gray

PWR_ON

+5.03V

Purple

+5VSB

+5.09V

Yellow

+12V1

+12.17V

Yellow

+12V1

+12.17V

Orange

+3.3V

+3.379V

Un-notched Side

Notched Side

Orange/Brown

+3.3V

+3.376V

Blue

-12V

-12.03V

White

NC

NC

Red

+5V

+5.03V

Red

+5V

+5.03V

Red

+5V

+5.03V

 Auxiliary 4 pin PCIe Connector Wire Color

What reading it should be

What your reading is

Yellow

+12V

+12.15V

Yellow

+12V

+12.15V

Part 2: Calculate the voltage requirements for a desktop computer and select a replacement power supply

Device

Approximate Wattage

Hard Drive

6.5 – 9W

DVD drive

15 – 27W

CPU fan

2.4 – 3W

RAM module

2 – 3W

CPU

73 – 95w

Motherboard

25 – 40W

Casing fan

0.6 – 1.8W

TOTAL APPROXIMATE WATTAGE

178.8W

Connector

Quantity

Main 24 pin P1 Connector 1

Auxiliary power 4 pin 12 volt

1

Thermal connector

1

SATA power connectors

2

Front fan connector

1

1) URL to the power supply 

(https://www.newegg.com/p/1HU-01AD-001J3)

2) picture of the PSU and the title of the ad

3) details showing the total wattage (and optionally wattage on the 12v rail) & available connectors.

REFLECTION Through this lab, I learnt how to use a multimeter and got to know the applications of it. Specially how to check the voltage of the Power Supply Unit of a PC which I believe is important to know. I also learnt how to check the total wattage of the Power Supply Unit. What I found most interesting in the Lab 4, is that how most manufactures depict false maximum power amounts in their products. Lab 4 is a knowledgeable lab, and I learnt a lot through this lab. Specially the components that require the most amount of power. Through this lab I know how to choose a Power Supply Unit correctly....