This document provides instructions for properly using computer hardware tools and materials for servicing computers. It discusses electrostatic discharge tools like antistatic wrist straps and mats. It also covers proper use of various hand tools like screwdrivers, hex drivers, and pliers. Finally, it provides tips for cleaning computer components and surfaces with compressed air and approved cleaning solutions and materials.

1. ICT COMPUTER
HARDWARE
SERVICING
LESSON 2

2. LESSON 2 PROPER USE OF
COMPUTER HARDWARE TOOLS
ESD tools are used to equalize the
electrical charge between you and the
equipment. When reducing the potential
for ESD, it reduces the likelihood of
damage to delicate circuits or
components.

3. ANTISTATIC WRIST STRAP
Tips for properly use of ESD tools:
1.Wrap the strap around your wrist and secure it using the
snap or Velcro. The metal on the back of the wrist strap must
remain in contact with your skin at all times.
2.Snap the connector at the end of the wire to the wrist strap,
and connect the other end either to the equipment or to the
same grounding point that the antistatic mat is connected
to.The metal skeleton of the case .is a good place to connect
the wire. When connecting the wire to equipment that you
are working on, choose an unpainted metal surface. A
painted surface does not conduct the electricity as well as
unpainted metal

5. ANTI STATIC MAT
1. Lay the mat on the workspace next to
or under the computer case.
-Clip the mat to the case to provide a
grounded surface on which you can
place parts as you remove them from the
system.

6. HAND TOOLS
(TIPS FOR PROPERLY USE OF HAND TOOLS
SCREW DRIVERS -
EACH SCREW MATCHES WITH THE CORRECT
SCREWDRIVER. PLACE THE SCREWDRIVER TIP ONTO THE
SCREW END. SWITCH THE CLOCKWISE SCREWDRIVER TO
TWIST THE SCREW AND PUSH THE SCREW IN
COUNTERCLOCKWISE. IF YOU OVER-TIGHTEN THEM
WITH A SCREWDRIVER, THE SCREWS MAY GET STRIPPED.
A STRIPPED PIN, CAN GET TRAPPED IN THE HOLE OF
THE BOLT, OR MAY NOT SECURELY SECURE. DISCARD
SCREWS OFF.

7. SCREW-
Match each screw with the proper screwdriver.
Place the tip of the screwdriver on the head of the
screw. Turn the screwdriver clockwise to tighten the
screw and counterclockwise to loosen the screw.
Screws can become stripped if you over-tighten
them with a screwdriver. A stripped screw, may get
stuck in the screw hole, or it may not tighten firmly.
Discard stripped screws.

8. FLAT HEAD SCREWDRIVER -
IF YOU ARE DEALING WITH A SLOTTED BOLT, USING A FLAT
HEAD SCREWDRIVER. DO NOT USE A FLAT HEAD
SCREWDRIVER TO LOOSEN A HEAD SCREW AT PHILLIPS.
USING A SCREWDRIVER NEVER AS A PRY BAR. IF YOU CAN'T
UNINSTALL AN ITEM, TEST AND SEE IF A CLIP OR LOCK IS
IN POSITION TO PROTECT THE OBJECT.

9. PHILLIPS HEAD SCREWDRIVER -
USING A SCREWDRIVER OR PHILLIPS
HEAD AND CROSSHEAD SCREWS.
SHOULD NOT USE THIS SORT OF
SCREWDRIVER TO HAVE IT PUNCTURED.
THIS WOULD HURT THE SCREWDRIVER'S
HANDLE.

10. HEX DRIVER –
TO LOOSEN AND TIGHTEN BOLTS WITH A
HEXAGONAL (SIX-SIDED) HEAD, USE A HEX
DRIVER. HEX BOLTS SHOULD NOT BE OVER-
TIGHT, AS THE BOLTS' THREADS CAN BE
STRIPPED.
DO NOT USE THE HEX DRIVER WHICH IS TOO
BIG FOR THE BOLT YOU ARE USING.

11. PART RETRIEVER,NEEDLE-NOSE PLIERS, OR
TWEEZERS
YOU SHOULD USE THE COMPONENT
RETRIEVER, NEEDLE-NOSE PLIERS, AND
TWEEZERS TO POSITION AND REMOVE PIECES
THAT COULD BE IMPOSSIBLE TO TOUCH WITH
YOUR FINGERTIPS. WHEN USING SUCH
MATERIALS, DO NOT SMASH OR TOUCH ANY
PARTS.

12. PROPER USE OF CLEANING MATERIALS/
TOOLS
KEEPING COMPUTERS CLEAN INSIDE AND OUT IS A
VITAL PART OF A MAINTENANCE PROGRAM. DIRT
CAN CAUSE PROBLEMS WITH THE PHYSICAL
OPERATION OF FANS, BUTTONS, AND OTHER
MECHANICAL COMPONENTS. ON ELECTRICAL
COMPONENTS, AN EXCESSIVE BUILDUP OF DUST
WILL ACT LIKE AN INSULATOR AND TRAP THE HEAT.
THIS INSULATION WILL IMPAIR THE ABILITY OF HEAT
SINKS AND COOLING FANS TO KEEP COMPONENTS
COOL, CAUSING CHIPS AND CIRCUITS TO OVERHEAT
AND FAIL.

13. TIPS FOR PROPER USE OF CLEANING
MATERIALS/TOOLS
COMPUTER CASES AND MONITORS
CLEAN COMPUTER CASES AND MONITOR OUTDOORS ON A DAMP,
LINT-FREE CLOTH WITH A MILD CLEANING SOLUTION. TO CREATE
THE CLEANING SOLUTION, MIX ONE DROP OF DISHWASHING LIQUID
AND FOUR OUNCES OF WATER. WHEN SOME WATER DRIPS WITHIN
THE DEVICE, GIVE THE LIQUID TO DRY ENOUGH TIME BEFORE
TURNING ON THE MACHINE.

14. S
LCD SCREENS -
DO NOT USE AMMONIZED GLASS CLEANERS
ON AN LCD SCREEN OR ANY OTHER
SOLUTION, UNLESS THE CLEANER IS
SPECIFICALLY DESIGNED FOR THAT
PURPOSE. HARSH CHEMICALS DAMAGE THE ON-
SCREEN COATING. SUCH DISPLAYS ARE NOT
COVERED BY GLASS, SO BE CAREFUL WHEN
WASHING THEM, AND DON'T CLICK TIGHTLY ON
THE SCREEN.

15. COMPONENT CONTACTS
-CLEAN THE CONTACTS ON ISOPROPYL ALCOHOL
COMPONENTS. DON'T USE ALCOHOL TO RUB. ALCOHOL
RUBBING INCLUDES IMPURITIES WHICH MAY AFFECT
CONTACTS. MAKE SURE THE CONTACTS RECEIVE NO LINT
FROM THE FABRIC OR COTTON SWAB. BLOW SOME LINT
OFF THE COMPRESSED AIR CONTACTS BEFORE
REINSTALLING

16. KEYBOARD
-CLEAN A DESKTOP KEYBOARD WITH COMPRESSED AIR OR A SMALL,
HAND-HELD VACUUM CLEANER WITH A BRUSH ATTACHMENT
MOUSE
-USING A GLASS CLEANER AND A FLUFFY TOWEL TO BRUSH THE MOUSE
OUTSIDE. DO NOT SPRINKLE GLASS CLEANER DIRECTLY ON YOUR
MOUSE. IF YOU CLEAN A BALL MOUSE, YOU CAN REMOVE THE BALL
AND CLEAN IT WITH A SOFT CLOTH AND A GLASS CLEANER. WIPE THE
ROLLERS WITH THE SAME RAG, WIPE INSIDE THE CURSOR. DO NOT
SPRINKLE ANY LIQUIDS IN THE MOUSE.

17. ACTIVITY 1 WHOLE
(FILL IN THE BLANKS)
A.Direction. Fill in the blanks. Write your answers on a separate sheet
of paper.
1.The purpose of an antistatic wrist strap is to ________ the
electrical charge between you and the equipment.
2.Turn the screwdriver _________ to tighten the screw
3. Turn the screwdriver ________________ to loosen the screw.
4.Use a ________ head screwdriver with crosshead screws.
5.On electrical components, an excessive buildup of dust will act like an
_________ and trap the heat.

18. 6.When compressed air is used to clean inside the computer, the air
should be blown around the components with a minimum distance of
______ inches from the nozzle.
7.Pencils should not be used inside the computer to change the setting
of switches or to pry off jumpers because the tip contains _____ which
can act as a conductor and may damage the computer components.
8.To clean the screens of CRT monitors, dampen a soft, clean, lint-free
cloth with _______ water and wipe the screen from top to bottom.
9.Clean the contacts on components with _________ alcohol.
10.Use a __________ to loosen and tighten bolts that have a hexagonal
(six-sided) head.

19. B.DIRECTION:COMPLETE THE CRISS-CROSS PUZZLE AND FAMILIRIARIZE YOUR
SELF WITH THE HAND TOOLS BEING DESCRIBE

20. Down:
1. Sometimes called a nut driver, is used to tighten nuts in the same way
that a screwdriver tightens screws.
2. Used to test the integrity of circuits and the quality of electricity in
computer components.
4. Used to hold small parts.
5. Used to loosen or tighten screws that have a star-like depression on
the top, a feature that is mainly found on laptops.
8. Used to light up areas that you cannot see well.
Across:
3. Used to strip and cut wires.
6. Used to manipulate small parts.
7. Used to bundle cables neatly inside and outside of a computer.
9. Used to retrieve parts from locations that are too small for your hand to
fit.