k to 12 pc hardware servicing learning moduledocument transcript

8/12/2019 K to 12 PC Hardware Servicing Learning ModuleDocument Transcript

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K to 12 PC Hardware Servicing Learning ModuleDocument Transcript

1. K to 12 Basic Education CurriculumTechnology and Livelihood EducationLearningModuleCOMPUTER HARDWARESERVICINGEXPLORATORY COURSE

Grade 7 and Grade 8Republic of the PhilippinesDEPARTMENT OF EDUCATION

2. COMPUTER HARDWARE SERVICING 1K to 12Technology and Livelihood EducationTABLE OFCONTENTSWhat Is This Module About? ....................................................................................

2How Do You Use This Module ...............................................................................

3LESSON 1Use Hand Tools ........................................................................

430LESSON 2Perform Mensuration and Calculation ................................

3146LESSON 3Prepare and Interpret Technical Drawing ............................

4763LESSON 4Practice Occupational Safety and Health............................

.64 - 103Answer Keys.................................................................................................

.104 - 111Acknowledgment....................................................................................................

.112

3. COMPUTER HARDWARE SERVICING 2K to 12Technology and Livelihood EducationWelcome

to the world of Computer Hardware Servicing!This Module is an exploratory course which leads youto Computer HardwareServicing National Certificate Level II ( NC II)

1. It covers the 4 common competenciesthat a Grade 7 / Grade 8 Technology and LivelihoodEducation (TLE) student like you oughtto possess, namely:

1) Using hand tools;

2) Performing mensuration and calculation;

3) Preparing and interpreting technical drawing; and

4) Practicing occupational health and safety procedures.

These 4 common competencies are covered separately in 4 Lessons. As shownbelow, each Lessonis directed to the attainment of two or more learning outcomes

:Lesson 1Use Hand ToolsLearning Outcome (LO)

1 - Prepare hand toolsLearning Outcome (LO)

2- Use appropriate hand tools and test equipmentLearning Outcome (LO)


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3 - Maintain hand toolsLesson

2Perform Calculation and MensurationLearning Outcome (LO)

1 - Select components to be measuredLearning Outcome (LO)

2 - Carry out measurements and calculationLesson

3Prepare and Interpret Technical DrawingLearning Outcome (LO

) 1 - Identify different kinds of technical drawingLearning Outcome (LO)

2 - Interpret technical drawingLesson

4Practice Occupational Health and Safety ProceduresLearning Outcome (LO)

1 - Identify hazards and risksLearning Outcome (LO)

2 - Evaluate hazards and risksLearning Outcome (LO)

3 - Control hazards and risksYour success in this exploratory course on Computer HardwareServicing is shown in yourability to perform the performance standards found in each learningoutcome.

1NATIONAL CERTIFICATE (NC) is a certification issued to individuals who achieved all the requiredunits of competency for a nationalqualification as defined under the Training Regulations. NCs arealigned to specific levels within the PTQF.

(TESDA Board ResolutionNo. 2004-13, Training Regulations Framework)

NATIONAL CERTIFICATE LEVEL refers to the four

(4) qualification levels defined in the Philippine TVET Qualifications Framework(PTQF) where theworker with:a. NC I performs a routine and predictable tasks; has little judgment; and, works undersupervision;b. NC II performs prescribed range of functions involving known routines andprocedures; has limited choice and complexity offunctions, and has little accountability;What Is ThisModule About?

4. ReferencesTo get the most from this Module, you need to do the following:

1. Begin by reading and understanding the Learning Outcome/s and PerformanceStandards.These tell you what you should know and be able to do at the end of thisModule.

2. Find out what you already know by taking the Pretest then check your answeragainst the AnswerKey. If you get 99 to 100% of the items correctly, you mayproceed to the next Lesson. This means

that you do not need to go through theLesson because you already know what it is about. If youfailed to get 99 to 100%correctly, go through the Lesson again and review especially those itemswhich youfailed to get.3. Do the required Learning Activities. They begin with one or moreInformationSheets. An Information Sheet contains important notes or basic information that youneedto know.After reading the Information Sheet, test yourself on how much you learned byanswering theSelf-check. Refer to the Answer Key for correction. Do not hesitate togo back to the InformationSheet when you do not get all test items correctly. Thiswill ensure your mastery of basicinformation.4. Demonstrate what you have learned by doing what the Activity / Operation /JobSheetdirects you to do.5. You must be able to apply what you have learned in another activity or in real


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lifesituation.6. Accomplish the Scoring Rubrics for you to know how well you performed.Each Lessonalso provides you with references and definition of key terms for your guide.They can be of greathelp. Use them fully..How Do You Use This Module?If you have questions, ask your teacher for

assistance.How Do You Extend Your Learning?How Well Did You Perform?How Do You ApplyWhat You Learned?How Much Have You Learned?What Do You Need to Know?What Do YouAlready Know?Definition of TermsMaterials/ResourcesPerformance StandardsLearning

OutcomesCOMPUTER HARDWARE SERVICING 3K to 12Technology and LivelihoodEducationThis Module has 4 Lessons. Each Lesson has the following parts.

5. COMPUTER HARDWARE SERVICING 4K to 12Technology and Livelihood EducationUse HandToolsLESSON 1LO 1. prepare hand tools;LO 2. use appropriate hand tools and test equipment;andLO 3. maintain hand tools.LEARNING OUTCOMES:At the end of this Lesson, you are expectedtodo the following:

6. COMPUTER HARDWARE SERVICING 5K to 12Technology and Livelihood EducationBin - acontainer or enclosed space for storage.Computer chassis - the enclosure that contains most of thecomponents of acomputer.Diagnostic tools - used to test the integrity of circuits and the qualityofelectricity in computer components and to test the functionality of computerports.Hazards - risks;dangers.Insulation - - - - - - a material that reduces or prevents the transmission ofheat or sound orelectricity.Nozzle - - - - - - - - -a projecting part with an opening, as at the end of a hose,for regulatingand directing a flow of fluid.Preventive - intended or used to prevent or hinder.Static electricity - anaccumulation of electric charge on an insulated body.Tool - - - - - - - - - a handheld device that aids inaccomplishing a task.Toolkit - - - - - - - a set of tools designed to be used together or for aparticularpurpose.ESD - - - - - - - - - Electrostatic discharge.USB - - - - - - - - - Universal serial busLCD - - - - - -- - - Liquid crystal displayDefinition of TermsAcronyms

7. COMPUTER HARDWARE SERVICING 6K to 12Technology and Livelihood Education1.Workshop2. Tables and Chairs3. Computers4. USB Flash Drive5. LCD6. ESD Tools7. Hand Tools8.Cleaning Tools9. Diagnostic ToolsMaterialsPrepare hand toolsLEARNING OUTCOME 11. Tasks tobe undertaken are properly identified.2. Appropriate hand tools are identified and selected accordingto the taskrequirements.3. Appropriate hand tools checked for proper operation and safety4. Unsafe

or faulty tools are identified5. Marked all tools for repair according to standard companyproceduresPERFORMANCE STANDARDS

8. COMPUTER HARDWARE SERVICING 7K to 12Technology and Livelihood EducationA.Direction. Write TRUE if the statement is correct and FALSE if it is wrong. Writeyour answers on aseparate sheet of paper._______ 1. Selecting the best tool for each task requires training in theproper use ofthe tools, field experience in their safe use, and following the manufacturersguidanceand instructions for that specific tool._______ 2. When obtaining the tool, all the associated toolingand consumable parts,as recommended by the manufacturer, must be included._______ 3. Thesafe use of a tool depends on using the tool for the purpose for which itwas designed and also forother purposes where it can be used assubstitute where tool is not available._______ 4. All toolsshould be kept in good condition with regular maintenance._______ 5. Preparing for a task includesonly knowing the task to be done._______ 6. Preparing for a task includes also the sequence of

tasks to be done.B. Direction. Select the letter of the correct answer. Write your answers on aseparatesheet of paper.1. Which tool is used for hardware to stand on to prevent static electricityfrom buildingup?a. Anti-static mat c. Philips head screwdriverb. Hex driver d. Wire cutter2. Whichtool is used to loosen or tighten cross-head screws?a. Anti-static mat c. Philips head screwdriverb.Hex driver d. Wire cutter3. Which tool is sometimes called a nut driver? It is used to tighten nuts inthe sameway that a screwdriver tightens screws?a. Anti-static mat c. Philips head screwdriverb. Hexdriver d. Wire cutter4. Which tool is used to strip and cut wires?a. Anti-static mat c. Philips headscrewdriverb. Hex driver d. Wire cutter5. Which tool is used to retrieve parts from location that aretoo small for your hand tofit?a. Part Retriever c. Cable tiesb. Lint-free Cloth d. Flat head


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screwdriver6. Which tool is used to clean different computer components without scratchingorleaving debris?a. Part Retriever c. Cable tiesWhat Do You Already Know?Pretest LO 1Let usdetermine how much you already know about task preparation and hand tools.Take this test.

9. COMPUTER HARDWARE SERVICING 8K to 12Technology and Livelihood Educationb. Lint-freeCloth d. Flat head screwdriver7. Which tool is used to bundle cables neatly inside and outside of a

computer?a. Part Retriever c. Cable tiesb. Lint-free Cloth d. Flat head screwdriver8. Which tool isused to loosen or tighten slotted screws?a. Part Retriever c. Cable tiesb. Lint-free Cloth d. Flat headscrewdriver9. Which tool is used to loosen or tighten screws that have a star-like depression onthetop, a feature that is mainly found on laptop?a. Anti-static mat c. Philips head screwdriverb. Torxscrewdriver d. Wire cutter10. Which tool is used to blow away dust and debris from differentcomputer partswithout touching the components?a. Anti-static mat c. Compressed airb. Hex driver d.Wire cutterProper tool selectionA tool is a handheld device that aids in accomplishing a task. Toolsrange from atraditional metal cutting part of a machine to an element of a computer programthatactivates and controls a particular function.Preparing for the task to be undertaken includesproper tool selection.1. How do you select the best tool for the job? First, know and understand indetail thescope of work to be accomplished, second, plan for the scope taking into accountthesequence of tasks.2. Selecting the best tool for each task requires training in the proper use ofthe tools,field experience in their safe use, and following the manufacturers guidance

andinstructions for that specific tool.3. When obtaining the tool all the associated tooling andconsumable parts, asrecommended by the manufacturer, must be included. In addition,relatedconsumable parts must also be selected and used according to theirmanufacturersinstructions.What Do You Need To Know?Information Sheet 1.1Read InformationSheet 1.1 very well then find out how much you can rememberand how much you learned by doingSelf-check 1.1.

10. Diagnostic toolsElectro-Static Discharge (ESD) ToolsStatic electricity is easily generated by frictionon carpets, tile flooring, clothing, hair, fabric,and etc. The friction of moving air alone will chargesuspended particles and cause thebuildup of static electrical charges on people and objects in theenvironment. Groundedantistatic work mats used with antistatic wrist straps provide the most basicmeans for thecontrolled discharge of electrostatic electricity. Examples of ESD Tools:Anti-static wriststrapused to prevent ESD damage to computerequipment.Anti-static matused to stand on or

place hardware on to preventstatic electricity from building up.Cleaning toolsHand toolsElectro-Static Discharge (ESD) toolsCOMPUTER HARDWARE SERVICING 9K to 12Technology andLivelihood EducationSafe Use of toolsOnce selected, use the tool for the purpose for which it wasdesigned. Not all toolscome with detailed instructions, but there are those that do spell out the safetyDos andDonts for the your safety. If there are set-up/use options, operator judgment mustalwaysbe based on what is the safest way to use the tool.Environmental Safety and Health Programrequires the following: All tools be kept in good condition with regular maintenance The right tool beused for the job Each tool be examined before use AND damaged or defective tools NOT to beused Tools be operated according to manufacturers instructions The right protective equipment forthe tool and activity be usedHARDWARE TOOLSTo complete hardware repairs, it is important tohave a toolkit that should contain all of thenecessary tools. As you gain experience, you will learnwhich tools to have available fordifferent types of jobs. Hardware tools are grouped into these four

categories:

11.COMPUTER HARDWARE SERVICING 10K to 12Technology and Livelihood EducationHandToolsA hand tool is a device for performing work on a material or a physical system usingonlyhands. The hand tools can be manually used employing force, or electrically powered,usingelectrical current. Examples of Hand Tools:Flat head screwdriverused to loosen or tightenslottedscrews.Philips head screwdriverused to loosen or tighten cross-head screws.Torxscrewdriver - used to loosen or tighten screws thathave a star-like depression on the top, a feature


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that ismainly found on laptop.Hex driversometimes called a nut driver, is used totighten nuts in thesame way that a screwdriver tightensscrews.Needle-nose plierused to hold small parts.

12.COMPUTER HARDWARE SERVICING 11K to 12Technology and Livelihood EducationWirecutterused to strip and cut wires.Tweezersused to manipulate small parts.Part retrieverusedto retrieve parts from location thatare to small for your hand to fit.Flashlightused to light up areas

that you cannot seeclearly.Cleaning ToolsHaving the appropriate cleaning tools is essential whenmaintaining or repairing computers.Using these tools ensures that computer components are notdamaged during cleaning.Examples:Lint-free clothused to clean different computercomponentswithout scratching orleaving debris.

13.COMPUTER HARDWARE SERVICING 12K to 12Technology and LivelihoodEducationCompressed airused to blow away dust and debris fromdifferent computer partswithouttouching the components.Cable tiesused to bundle cables neatly inside andoutside of acomputer.Parts organizerused to hold screw, jumpers, fastenersand other small parts andpreventsthem from getting mixed together.Diagnostic ToolsComputers are easier to use and aremore dependable with each new generation ofhardware and operating system updates, but thatdoesnt mean that theyre problem-free.Here are the most popular tools for diagnosing your computerproblems:Multimeterused to test the integrity of circuits and thequality of electricity in computer

components.Loopback Adapterused to test the functionality ofcomputer ports.

14.COMPUTER HARDWARE SERVICING 13K to 12Technology and Livelihood EducationA.Direction. Write TRUE if the statement is correct and FALSE if it is wrong. Writeyour answers on aseparate sheet of paper._______ 1. Selecting the best tool for each task requires training in theproper use ofthe tools, field experience in their safe use, and following the manufacturersguidanceand instructions for that specific tool._______ 2. When obtaining the tool, all the associated toolingand consumable parts,as recommended by the manufacturer, must be included._______ 3. Thesafe use of a tool depends on using the tool for the purpose for which itwas designed and also forother purposes where it can be used assubstitute where tool is not available._______ 4. All toolsshould be kept in good condition with regular maintenance._______ 5. Preparing for a task includesonly knowing the task to be done._______ 6. Preparing for a task includes also the sequence oftasks to be done.B. Direction: Identify the tools on the boxes. Write your answer on a separate sheet

ofpaper.1. 8.2. 9.How Much Have You Learned?Self-Check 1.1

15.COMPUTER HARDWARE SERVICING 14K to 12Technology and Livelihood Education3. 10.4.11.5. 12.6. 13.7. 14.Refer to the Answer Key. What is your score?

16.COMPUTER HARDWARE SERVICING 15K to 12Technology and Livelihood EducationDirection:Prepare a matrix on Plan Preparation in maintaining and cleaning a personalcomputer. Some itemsare already given for you. Continue the Table.COMPUTER MAINTENANCECOMPONENTS TOCLEAN SCHEDULE Tools to useComputer case and outsidemonitorDaily(sample)KeyboardDirection: Using the given tools, segregate the following according to itsclassification.(The teacher will provide the tools for classification)Show that you learned somethingby doing this activity.Activity Sheet 1.2Activity Sheet 1.1HowDo YouApplyWhatYou HaveLearned?

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COMPUTER HARDWARE SERVICING 16K to 12Technology and LivelihoodEducationSCORING RUBRICS: for Activity Sheet 1.2Criteria:Number of Tools classifiedPoints2022 101519 81014 659 414 2Find out by accomplishing the Scoring Rubric honestly andsincerely.Remember it is your learning at stake!How Well Did You Perform?

18.COMPUTER HARDWARE SERVICING 17K to 12Technology and Livelihood Education1.Workshop2. Tables and Chairs3. Computers4. USB Flash Drive5. LCD6. ESD Tools7. Hand Tools8.Cleaning Tools9. Diagnostic ToolsMaterialsUse appropriate hand tools and testequipmentLEARNING OUTCOME 21. Tools are used according to tasks undertaken.2. All safety


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procedures in using tools are observed at all times.3. Malfunctions, unplanned or unusual events arereported to thesupervisor.PERFORMANCE STANDARDS

19.COMPUTER HARDWARE SERVICING 18K to 12Technology and Livelihood EducationDirection.Fill in the blanks. Write your answers on a separate sheet of paper.1. The purpose of an antistaticwrist strap is to ________ the electrical charge betweenyou and the equipment.2. Turn the

screwdriver _________ to tighten the screw3. Turn the screwdriver ________________ to loosenthe 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.6. When compressed air isused to clean inside the computer, the air should be blownaround the components with a minimumdistance of ______ inches from the nozzle.7. Pencils should not be used inside the computer tochange the setting of switches orto pry off jumpers because the tip contains _____ which can act asa conductor andmay 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 andtighten bolts that have a hexagonal (six-sided)head.What Do You Already Know?Pretest LO 2Let usdetermine how much you already know about the use of appropriate handtools and testingequipment. Take this test.

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COMPUTER HARDWARE SERVICING 19K to 12Technology and Livelihood EducationPROPERUSE OF TOOLSProper Use of ESD ToolsThe purpose of an antistatic wrist strap is to equalizetheelectrical charge between you and the equipment.The antistatic wrist strap is a conductor thatconnectsyour body to the equipment that you are working on.When static electricity builds up in yourbody, theconnection made by the wrist strap to the equipment, orground, channels the electricitythrough the wire thatconnects the strap.The wrist strap has two parts and is easy to wear:1. Wrapthe strap around your wrist and secure itusing the snap or Velcro. The metal on the backof the wriststrap must remain in contact with your skin at all times.2. Snap the connector at the end of the wireto the wrist strap, and connect the otherend either to the equipment or to the same grounding pointthat the antistatic mat isconnected to. The metal skeleton of the case is a good place to connect thewire.When connecting the wire to equipment that you are working on, choose anunpainted metalsurface. A painted surface does not conduct the electricity as well asunpainted metal.An antistaticmat is slightly conductive. It works by drawing static electricity away from acomponent andtransferring it safely from equipment to a grounding point:1. Lay the mat on the workspace next to orunder the computer case.2. Clip the mat to the case to provide a grounded surface on which you canplace partsas you remove them from the system.Reducing the potential for ESD reduces thelikelihood of damage to delicate circuits orcomponents.Proper Use of Hand ToolsA technician needsto be able to properly use each tool in the toolkit. This topic covers manyof the various hand toolsused when repairing computers.What Do You Need To Know?Information Sheet 3.1Read theInformation Sheet 3.1 very well then find out how much you canremember and how much youlearned by doing Self-check 1.1.

21.COMPUTER HARDWARE SERVICING 20K to 12Technology and LivelihoodEducationScrewsMatch each screw with the proper screwdriver. Place the tip of the screwdriver onthe headof the screw. Turn the screwdriver clockwise to tighten the screw and counterclockwise

toloosen the screw.Screws can become stripped if you over-tighten them with a screwdriver. Astripped screw,may get stuck in the screw hole, or it may not tighten firmly. Discard strippedscrews.Flat head screwdriverUse a flat head screwdriver when you are working with a slotted screw.Do not use a flathead screwdriver to remove a Phillips head screw. Never use a screwdriver as a prybar. Ifyou cannot remove a component, check to see if there is a clip or latch that is securingthecomponent in place.CAUTION: If excessive force is needed to remove or add a component,something isprobably wrong. Take a second look to make sure that you have not missed a screw oralocking clip that is holding the component in place. Refer to the device manual or diagramforadditional information.Phillips head screwdriverUse a Phillips head screwdriver with crosshead


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screws. Do not use this type of screwdriverto puncture anything. This will damage the head of thescrewdriver.Hex driverUse a hex driver to loosen and tighten bolts that have a hexagonal (six-sided)head. Hexbolts should not be over-tightened because the threads of the bolts can be stripped. Donotuse a hex driver that is too large for the bolt that you are using.CAUTION: Some tools aremagnetized. When working around electronic devices, be surethat the tools you are using have notbeen magnetized. Magnetic fields can be harmful todata stored on magnetic media. Test your tool

by touching the tool with a screw. If the screwis attracted to the tool, do not use the tool.Partretriever, Needle-nose pliers, or tweezersThe part retriever, needle-nose pliers, and tweezers can beused to place and retrieve partsthat may be hard to reach with your fingers. Do not scratch or hit anycomponents whenusing these tools.CAUTION: Pencils should not be used inside the computer tochange the setting of switchesor to pry off jumpers. The pencil lead can act as a conductor and maydamage the computercomponents.Proper Use of Cleaning MaterialsKeeping computers clean insideand out is a vital part of a maintenance program. Dirt cancause problems with the physical operationof fans, buttons, and other mechanicalcomponents. On electrical components, an excessive buildupof dust will act like an insulatorand trap the heat. This insulation will impair the ability of heat sinksand cooling fans to keepcomponents cool, causing chips and circuits to overheat and fail.CAUTION:When compressed air is used to clean inside the computer, the air should beblown around thecomponents with a minimum distance of four inches from the nozzle. Thepower supply and the fanshould be cleaned from the back of the case.

22.COMPUTER HARDWARE SERVICING 21K to 12Technology and LivelihoodEducationCAUTION: Before cleaning any device, turn it off and unplug the device from thepowersource.Computer Cases and MonitorsClean computer cases and the outside of monitors witha mild cleaning solution on a damp,lint-free cloth. Mix one drop of dishwashing liquid with fourounces of water to create thecleaning solution. If any water drips inside the case, allow enough timefor the liquid to drybefore powering on the computer.LCD ScreensDo not use ammoniated glasscleaners or any other solution on an LCD screen, unless thecleaner is specifically designed for thepurpose. Harsh chemicals will damage the coating onthe screen. There is no glass protecting thesescreens, so be gentle when cleaning themand do not press firmly on the screen.CRT ScreensToclean the screens of CRT monitors, dampen a soft,clean, lint-free cloth with distilled water and wipethescreen from top to bottom. Then use a soft, dry cloth towipe the screen and remove any streakingafter you havecleaned the monitor.Clean dusty components with a can of compressedair.Compressed air does not cause electrostatic buildup oncomponents. Make sure that you are in awell-ventilatedarea before blowing the dust out of the computer. A bestpractice is to wear a dustmask to make sure that you donot breathe in the dust particles.Blow out the dust using short burstsfrom the can. Never tip the can or use the compressedair can upside down. Do not allow the fanblades to spin from the force of the compressedair. Hold the fan in place. Fan motors can be ruinedfrom spinning when the motor is notturned on.Component ContactsClean the contacts oncomponents with isopropyl alcohol. Do not use rubbing alcohol.Rubbing alcohol contains impuritiesthat can damage contacts. Make sure that the contactsdo not collect any lint from the cloth or cottonswab. Blow any lint off the contacts withcompressed air before reinstallation.KeyboardClean adesktop keyboard with compressed air or a small, hand-held vacuum cleaner with abrushattachment.CAUTION: Never use a standard vacuum cleaner inside a computer case. The plasticpartsof the vacuum cleaner can build up static electricity and discharge to the components. Useonly

a vacuum approved for electronic components.MouseUse glass cleaner and a soft cloth to clean theoutside of the mouse. Do not spray glasscleaner directly on the mouse. If cleaning a ball mouse, youcan remove the ball and clean itwith glass cleaner and a soft cloth. Wipe the rollers clean inside themouse with the samecloth. Do not spray any liquids inside the mouse.

23.COMPUTER HARDWARE SERVICING 22K to 12Technology and Livelihood EducationA.Direction. Identify the appropriate tool to use for each of the following:_________________1.Equalize the electrical charge between you and theequipment._________________2. Tighten /loosen screw_________________3. Tighten / looses bold with a hexagonal


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head_________________4. Retrieve parts that may be hard to reach byyourfingers_________________5. Tighten / loosen a slotted screw.B. Direction: Complete thecomputer cleaning chart shown below.COMPUTER MAINTENANCECOMPONENTS TO CLEANCLEAN WITH:Computer case and outsidemonitorMild cleaning solution and lint free cloth(sample)KeyboardMouseLCD screenCRT screenHeat sinkRAMRefer to the Answer Key. What isyour score?How Much Have You Learned?Self-Check 2.1

24.COMPUTER HARDWARE SERVICING 23K to 12Technology and Livelihood EducationDirection:Use the appropriate tools to do each of the following tasks.1. Loosen computer casing screws2.Blow away dust from keyboard3. Tighten screws of a laptop4. Bundle cables inside the computer5.Test functionality of the printer port6. Remove insulation of wires7. Loosen nuts8. Prevent from ESDeffectsShow that you learned something by doing this activity.HowDo YouApplyWhatYouHaveLearned?Operation Sheet 1.1

25.COMPUTER HARDWARE SERVICING 24K to 12Technology and Livelihood EducationScoringRubricsTaskWas the tool usedcorrect?(please check)Was the tool usedproperly?(please check)YesNo Yes No1. Loosen computer casing screws2. Blow away dust from keyboard3. Tighten screws ofa laptop4. Bundle cables inside the computer5. Test functionality of the printer port6. Removeinsulation of wires7. Loosen nuts8. Prevent from ESD effectsTotal ScoreFor Total Score - Number of

YES for correct tool used- Number of Yes for tool used properlyHighest Possible Score 16Find outby accomplishing the Scoring Rubric honestly and sincerely.Remember it is your learning atstake!How Well Did You Perform?Interpretation of score16 Excellent1415 Very Good1213Good911 Fair8 and below Poor

26.COMPUTER HARDWARE SERVICING 25K to 12Technology and Livelihood Education1.Workshop2. Tables and Chairs3. Computers4. USB Flash Drive5. LCD6. ESD Tools7. Hand Tools8.Cleaning Tools9. Diagnostic ToolsMaterialsMaintain hand toolsLEARNING OUTCOME 31. Toolsused are according to tasks undertaken.2. Routine maintenance of tools is undertaken according tostandardoperational procedures, principles and techniques.3. Tools are stored safely in appropriatelocations in accordance withmanufacturers specifications or standard operatingprocedures.PERFORMANCE STANDARDS

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COMPUTER HARDWARE SERVICING 26K to 12Technology and Livelihood EducationDirection.Write TRUE if the statement is correct and FALSE if it is wrong. Write youranswers on a separatesheet of paper.1. All tools and equipment must be properly maintained so that workers arenotendangered.2. Preventive maintenance is the systematic care and protection of tools,equipmentand machines in order to keep them in a safe, usable condition,limit downtime and extendproductivity.3. The degree of detail to include regarding tools and equipment maintenancewilldepend on the kinds of tools/equipment used.4. Damaged or defective equipment/tools should betagged and removed fromservice.5. Most manufacturers can provide maintenance schedules fortheir equipment.6. Properly stored tools and equipment will be easy to find when needed and arelesslikely to be lost.7. Use bins for storing small parts is a good practice on proper storage.8. Productivityis increased because time is not lost looking for tools, parts andequipment is one of the benefits ofproper storage.What Do You Already Know?Pretest LO 3Let us determine how much you already

know about the maintenance of handtools. Take this test.

28. Retaining records of maintenance/service conductedWhat Do You Need To Know?InformationSheet 1.1Read the Information Sheet 1.1 very well then find out how much you canremember and

how much you learned by doing Self-check 1.1.Ensuring that the person(s) performing themaintenance are competent (e.g. licensedmechanic)Ensuring that maintenance is performed asrequiredObtaining a copy of the maintenance schedule recommended by the manufacturertrainskey personnel.The degree of detail to include regarding tools andequipment maintenance willdepend on the kinds oftools/equipment used. Some construction equipmentmay have very specific


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inspection and maintenancerequirements. Electronic equipment may havedifferent maintenancerequirements. Hand tools mayrequire only basic maintenance. Power tools shouldbe maintained ingood working order. This may belimited to ensuring that blades/bits are replacedwhen needed andthose guards or other safetydevices are operable and any damaged electricalcords/plugs arerepaired or replaced. Damaged ordefective equipment/tools should be tagged andremoved fromservice.Most manufacturers can provide maintenance schedules for their equipment.

Largecompanies typically have a comprehensive maintenance program due to the capitalinvestmentand/or leasing agreements involved. Smaller companies may lease equipmentand maintenanceservices may be included in the leasing agreement.General requirements for tools and equipment

maintenance include:defines operational procedures, andcontrols hazards,well organized andscheduled,COMPUTER HARDWARE SERVICING 27K to 12Technology and LivelihoodEducationTOOL AND EQUIPMENT MAINTENANCEAll tools and equipment must be properlymaintained so that workers are not endangered.Regulations require inspections of tools, machinesand equipment before use.Preventive maintenance is the systematic care and protection of tools,equipment andmachines in order to keep them in a safe, usable condition limit downtime andextendproductivity. We must always be aware that maintenance tasks themselves arepotentiallyhazardous and can result in injury. A successful maintenance program is:

29. Workshop staff develop a sense of responsibility and pride in their work.Productivity is increasedbecause time is not wasted looking for tools, parts andequipment.Costs are reduced.Tools andparts are kept in good condition and are easy to findConsider making an individual (or individuals)responsible for the good maintenanceof tools and parts.Figure 1. Figure 2. Figure 3.Benefits:Usebins for storing small parts (Figure 3).Tools should be properly placed on the board, and labeled(Figure 2). Considerdrawing the shapes of the tools on the board so that they always get put back in

thesame position.Parts should be properly stored and labeled (Figure 1).Set up a system forremoval and tagging of damaged or defective tools andequipmentPROPER STORAGE OF TOOLS,PARTS, AND EQUIPMENTTo ensure that tools and equipment remain in good condition and last fora long time, storethem properly. Properly stored tools and equipment will be easy to find when

needed andare less likely to be lost.Good practices include:Specifying who is responsible foroverseeing equipment maintenance and where therecords are keptCOMPUTER HARDWARESERVICING 28K to 12Technology and Livelihood Education

30.COMPUTER HARDWARE SERVICING 29K to 12Technology and LivelihoodEducationDirections: Enumerate the following.Good practices in the proper storage of tools: (at least2)1.2.Benefits of proper storage of tools: (at least 2)1.2.Direction: Conduct a maintenance activity onthe given hand tools.TOOLS MAINTENANCE ACTIVITY1. Flat Head Screwdriver Clean andMagnetize2. Philips Head Screwdriver Clean and Magnetize3. Torx Screwdriver Clean andMagnetize4. Hex Driver Clean and Magnetize5. Needle-Nose Plier Clean and Lubricate6. WireCutter Clean, Lubricate andSharpen, if necessary7. Tweezer Clean8. Part Retriever Clean9.Flashlight Clean and Change batteries if drained10. Multimeter Clean and CalibrateRefer to theAnswer Key. What is your score?Show that you learned something by doing this activity.How MuchHave You Learned?Operation Sheet 1.1Self-Check 1.1HowDo YouApplyWhatYou HaveLearned?

31. Ron GilstBarry Press, Marcia Press, PC Upgrade and Repair Bible, DesktopEdition., WileyPublishing Inc., 10475 Crosspoint Boulevard, Indianapolis,IN 46256LO 2Ron Gilster, PC RepairBench Book., Wiley Publishing Inc., 10475Crosspoint Boulevard, Indianapolis, IN 46256http://www.iml.uts.edu.au/assessment-futures/designing/assembling.htmlLO 2http://www.bechtel.com/assets/files/Environmental/ToolboxSafetyTopics/2010/ProperToolSelection.p

dfCOMPUTER HARDWARE SERVICING 30K to 12Technology and Livelihood EducationScoreCardActivity Excellent VerysatisfactorySatisfactory ScoreCleaning hand tools 5 3 1Magnetizing handtoolsCalibrating hand toolsChanging batteriesLubricating hand toolsSharpening hand toolsStoringhand toolsFind out by accomplishing the Scoring Rubric honestly and sincerely.Remember it is your


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learning at stake!How Well Did You Perform?LO1 Barry Press, Marcia Press, PC Upgrade andRepair Bible, DesktopEdition., Wiley Publishing Inc., 10475 Crosspoint Boulevard,Indianapolis, IN46256REFERENCESCongratulations! You did a great job! Restand relax a while then move on to

the nextlesson. Good luck!http://www.google.comBarry Press, Marcia Press, PC Upgrade andRepair Bible, DesktopEdition., Wiley Publishing Inc., 10475 Crosspoint Boulevard, Indianapolis,IN

46256LO3er, PC Repair Bench Book., Wiley Publishing Inc., 10475Crosspoint Boulevard,

Indianapolis, IN 46256

32.COMPUTER HARDWARE SERVICING 31K to 12Technology and Livelihood EducationPerformMensuration and CalculationLESSON 2LO 1. select components to be measured; andLO 2. carryout mensuration and calculation.LEARNING OUTCOMES:At the end of this Lesson, you areexpected todo the following:

33.COMPUTER HARDWARE SERVICING 32K to 12Technology and Livelihood EducationBit - afundamental unit of information having just two possible values, as either of thebinary digits 0 or1.Byte - a unit of digital information in computing and telecommunications that mostcommonlyconsists of eight bits.Bootingstarting (a computer) by loading an operating system from adisk.Electronic storage - a device for recording (storing) information (data).Firewire - AppleComputers version of a standard, IEEE 1394, High Performance SerialBus, for connecting devices

to your personal computer.Hot-swappable - the connection and disconnection of peripherals or othercomponentswithout interrupting system operation.Interface - the point of interaction orcommunication between a computer and any otherentity, such as a printer or human operator.Laser- a device that emits light (electromagnetic radiation) through a process of opticalamplification basedon the stimulated emission of photons.Magnetic platter - a thin, high precision disk that is coated onboth sides with a highprecision magnetic material and which is used in a hard disk drive(HDD) tostore data.Memory module - a narrow printed circuit board that holds memory chips.Magneticstorage media - any storage medium in which different patterns of magnetizationare used torepresent stored bits or bytes of informationOperating system - a set of programs that managecomputer hardware resources andprovide common services for application software.Optical storagemedia - any storage in which data is written and read with a laser forarchival or backuppurposes.HDDhard disk driveIDE - Integrated Drive ElectronicsDefinition of TermsAcronyms

34.

COMPUTER HARDWARE SERVICING 33K to 12Technology and Livelihood Education1.Workshop2. Tables and Chairs3. Computers4. LCD5. Different types of Memory6. Different types ofStorage Devices7. Paper8. Pencil/BallpenMaterialsSelect components to be measuredLEARNINGOUTCOME 11. Object or component to be measured is identified.2. Correct specifications areobtained from relevant source.3. Accurate measurements are obtained for job.PERFORMANCESTANDARDS

35.COMPUTER HARDWARE SERVICING 34K to 12Technology and Livelihood EducationDirection.Match items on Column A with Column B. Write your answers on a separatesheet of paper.___ 1.Chips that are located on the motherboard. A. Registers___ 2. A magnetic storage device that isinstalledinside the computer.B. Flash drive or Thumb drive___ 3. Early drive controller interface thatconnectscomputers and hard disk drives which aninterface that uses a 40-pin connector.C. Read-

only memory___ 4. Temporary storage for data and programsthat are being accessed by theCPU.D. IDE___ 5. A storage device that uses lasers to read dataon the optical media.E. Floppydrive___ 6. A storage device that uses removable 3.5-inch disks.F. Random access memory___ 7.Soldered the memory chips on a specialcircuit board.G. Optical drive___ 8. A removable storagedevice that connects toa USB port.H. DDR___ 9. Memory cells built right into the CPU thatcontainspecific data needed particularly theArithmetic and Logic Unit.I. Hard drive___ 10. Technology thatdoubles the maximumbandwidth of SDRAM.J. Memory moduleWhat Do You Already Know?PretestLO 1Let us determine how much you already know about components in ComputerHardwareServicing to be measured. Take this test.


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DriveA hard drive, or hard disk drive, is a magnetic storage device thatis installed inside thecomputer. The hard drive is used aspermanent storage for data. In a Windows computer, theharddrive is usually configured as the C: drive and contains theoperating system and applications.The hard drive is oftenconfigured as the first drive in the boot sequence. The storagecapacity of ahard drive is measured in billions of bytes, orgigabytes (GB). The speed of a hard drive is measuredin revolutions per minute (RPM).Multiple hard drives can be added to increase storage

capacity.Traditional hard drives are magnetic. Magnetic hard drives have drive motors designedtospin magnetic platters and the drive heads. In contrast, the newer solid state drives (SSDs)do nothave moving parts. Because there are no drive motors and moving parts, the SSDuses far lessenergy than the magnetic hard drive. Non-volatile flash memory chips manageall storage on anSSD, which results in faster access to data, higher reliability, and reducedpower usage. SSDs havethe same form factor as magnetic hard drives and use ATA orSATA interfaces. SSDs can beinstalled as a replacement for magnetic drives.Optical DriveAn optical drive is a storage device thatuses lasers to readdata on the optical media. There are three types of opticaldrives: Compact Disc(CD), Digital Versatile Disc (DVD) andBlu-ray Disc (BD).

39. SCSISmall Computer System Interface is a drive controller interface that canconnect up to 15drives. SCSI can connect both internal and external drives. AnSCSI interface uses a 50-pin, 68-pin,

or 80-pin connector.SATASerial ATA refers to the serial version of the ATA drive controller

interface. ASATA interface uses a 7-pin data connector.IDEIntegrated Drive Electronics, alsocalled Advanced Technology Attachment(ATA) is an early drive controller interface that connects

computers and hard diskdrives. An IDE interface uses a 40-pin connector.COMPUTERHARDWARE SERVICING 38K to 12Technology and Livelihood EducationCD, DVD, and BDmedia can be pre-recorded (read-only), recordable (write once), or re-writable (read and writemultiple times).External Flash DriveAn external flash drive, also known as a thumb drive, is aremovablestorage device that connects to a USB port. An external flash drive usesthe same type ofnon-volatile memory chips as solid state drives and doesnot require power to maintain the data.These drives can be accessed bythe operating system in the same way that other types of drivesareaccessed.Types of Drive InterfacesHard drives and optical drives are manufactured with differentinterfaces that are used toconnect the drive to the computer. To install a storage drive in a computer,the connectioninterface on the drive must be the same as the controller on the motherboard. Here

aresome common drive interfaces:

40.COMPUTER HARDWARE SERVICING 39K to 12Technology and Livelihood EducationDirection.Match items on Column A with Column B. Write your answers on a separatesheet of paper._____1.A magnetic storage device that is installed inside thecomputer.A. Registers_____2. Early drivecontroller interface that connects computersand hard disk drives which an interface that uses a 40-pin connector.B. Flash drive orThumb drive_____3. Temporary storage for data and programs thatare beingaccessed by the CPU.C. Read-onlymemory_____4. A storage device that uses lasers toread data on theoptical media.D. IDE_____5. A storage device that uses removable 3.5-inch disks.E. Floppy drive_____6. Soldered the memory chips on a special circuit board. F. Randomaccessmemory_____7. A removable storage device that connects to a USB port. G. Opticaldrive_____8. Chips that are located on the motherboard. H. DDR_____9. Memory cells built rightinto the CPU that containspecific data needed particularly the Arithmetic andLogic Unit.I. Hard

drive_____10. Technology that doubles the maximum bandwidth ofSDRAM.J. Memory moduleReferto the Answer Key. What is your score?How Much Have You Learned?Self-Check 1.1

41.COMPUTER HARDWARE SERVICING 40K to 12Technology and Livelihood EducationDirection:Identify what type of memory module is presented.(The teacher will show several types of memorymodule.)Direction: The teacher will show several types of storage drives and will ask studentstoidentify the type of storage device and its interface is presented.Count you number of correctanswer out of the number of memory modules thatyour teacher will present.Show that you learned


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something by doing this activity.How Well Did You Perform?HowDo YouApplyWhatYouHaveLearned?Operation Sheet 1.1How Do You Extend Your Learning?

42.COMPUTER HARDWARE SERVICING 41K to 12Technology and Livelihood Education1.Workshop2. Tables and Chairs3. Computers4. LCD5. Different types of Memory6. Different types ofStorage Devices7. Paper8. Pencil/BallpenMaterialsCarry out mensuration and

calculationLEARNING OUTCOME 21. Calculation needed to complete work tasks is performedusing the fourfundamentals operations (addition, subtractions, multiplication and division).2.Numerical computation is self-checked and corrected for accuracy.PERFORMANCE STANDARDS

43.COMPUTER HARDWARE SERVICING 42K to 12Technology and Livelihood EducationDirection.Perform the following:1) Convert 14 to binary.2) If a 10 KB file is stored in a 1 MB folder, thenapproximately how many files of thesame size can be stored in that folder?DIGITALREPRESENTATIONWithin a computer, information is represented and storedin a digital binaryformat. The term bit is an abbreviation ofbinary digit and represents the smallest piece ofdata.Humans interpret words and pictures; computers interpretonly patterns of bits.A bit can haveonly two possible values, a one digit (1) ora zero digit (0). A bit can be used to represent the stateofsomething that has two states. For example, a light switchcan be either On or Off; in binaryrepresentation, thesestates would correspond to 1 and 0, respectively.Computers use binary codes

to represent and interpret letters, numbers and specialcharacters with bits. A commonly used code isthe American Standard Code for InformationRefer to the Answer Key. What is your score?What DoYou Already Know?What Do You Need To Know?Information Sheet 2.1Pretest LO 2Let usdetermine how much you already know about carrying out mensurationand calculation. Take thistest.Read the Information Sheet 2.1 very well then find out how much you canremember and howmuch you learned by doing Self-check 2.1.

44.COMPUTER HARDWARE SERVICING 43K to 12Technology and LivelihoodEducationInterchange (ASCII). With ASCII, each character is represented by a string of bits.Forexample:Capital letter: A = 01000001Number: 9 = 00001001Special character: # =00100011Each group of eight bits, such as the representations of letters and numbers, is known asabyte. Codes can be used to represent almost any type of information digitally: computerdata,graphics, photos, voice, video , and music.CONVERT DECIMAL NUMBERS TO BINARYTo convert

a decimal number to binary, all you have to do is divide the number by 2. Get thequotient and theremainder. Bring down the quotient, divide it by 2, and get the quotient andremainder again. Do itrepeatedly until the quotient results to 0. Copy the remainder frombottom to top, and that is thebinary equivalent.Example: 25Quotient Remainder25/2 12 112/2 6 06/2 3 03/2 1 11/2 0 125 =11001Checking: 1 1 0 0 1 multiplier16 8 4 2 1 equivalents16 8 0 0 1 results16+8+1 =25CALCULATING DATA STORAGEWhile a bit is the smallest representation of data, the most basicunit of digital storage is thebyte. A byte is 8 bits and is the smallest unit of measure (UOM) used torepresent datastorage capacity.When referring to storage space, we use the terms bytes (B),kilobytes (KB), megabytes(MB), gigabytes (GB), and terabytes (TB).

45.COMPUTER HARDWARE SERVICING 44K to 12Technology and Livelihood EducationOnekilobyte is a little more than one thousand bytes, specifically 1,024. A megabyterepresents more

than a million bytes or 1,048,576. A gigabyte is 1,073,741,824 bytes. Aterabyte is1,099,511,627,776. The exact number is gained by taking 2^n power.In general, when something isrepresented digitally, the greater the detail, the greater thenumber of bits needed to represent it. Alow-resolution picture from a digital camera will usearound 360KB, and a high-resolution picturecould use 2 MB or more.Kilobytes, megabytes, gigabytes, and terabytes are typically used tomeasure the size orstorage capacity of a device. Examples of components and devices that usebyte storageinclude: random access memory (RAM), hard disk drive space, CDs, DVDs, andMP3players.CDs have a data storage capacity of approximately 700 MB. DVDs have a datastoragecapacity of approximately 4.3 GB on a single-layer disc, and approximately 8.5 GB on adual-


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layer disc. BDs have a storage capacity of 25 GB on a single-layer disc, and 50 GB ona dual-layerdisc.Once we know the size of a file or folder, it is possible to determine the number of bytesbeingused. For example:A file is 20 KB in size1 KB = 1,024 Bytes20 * 1,024 = 20,480 bytes in a 20 KBfileIf a 20 KB file is stored in a 1 MB folder (1 MB = 1,048,576 bytes of space); thenapproximately atotal of 51 files of the same size can be stored in that folder (1,048,576 /20,480 = 51.2).

46.

COMPUTER HARDWARE SERVICING 45K to 12Technology and Livelihood EducationDirection:Convert the decimal numbers shown below to binary. Perform checking to verifyanswers.1) 192)283) 37Direction: Solve the problems indicated below. Show your solution.1. How many 60 KB jpgfiles can be stored on a 2 MB folder in your hard drive?2. How many 5 MB mp3 files can be storedon a 1 GB flash drive?3. How many 750 MB avi files can be stored on a 4.3 GB DVD-R?Refer to theAnswer Key. What is your score?Show that you learned something by doing this activity.How MuchHave You Learned?Operation Sheet 2.1Self-Check 2.1HowDo YouApplyWhatYou HaveLearned?

47. en.wikipedia.orgREFERENCESInterpretation of Scores3Excellent2Good1Fair0PoorCongratulations! You did a great job!Rest and relax a while then move on tothe next lesson.

Good luck!Barry Press, Marcia Press, PC Upgrade and Repair Bible,Desktop Edition., WileyPublishing Inc., 10475 CrosspointBoulevard, Indianapolis, IN 46256Ron Gilster, PC Repair BenchBook., Wiley Publishing Inc.,10475 Crosspoint Boulevard, Indianapolis, IN 46256

en.wikipedia.orgLO 2Barry Press, Marcia Press, PC Upgrade and Repair Bible,Desktop Edition.,Wiley Publishing Inc., 10475 CrosspointBoulevard, Indianapolis, IN 46256Ron Gilster, PC RepairBench Book., Wiley Publishing Inc.,10475 Crosspoint Boulevard, Indianapolis, IN

46256COMPUTER HARDWARE SERVICING 46K to 12Technology and LivelihoodEducationFind out by accomplishing the Scoring Rubric honestly and sincerely.Remember it is yourlearning at stake!How Well Did You Perform?LO1

48.COMPUTER HARDWARE SERVICING 47K to 12Technology and Livelihood EducationPrepareand Interpret Technical DrawingLESSON 3LO 1. identify different kinds of technical drawing; andLO2. interpret technical drawing.LEARNING OUTCOMES:At the end of this Lesson, you are expectedtodo the following:

49.

COMPUTER HARDWARE SERVICING 48K to 12Technology and Livelihood EducationDrawingact or the art of representing any object by means of lines and shadesPicturevisual representation orimage painted, drawn, photographed, orotherwise rendered on a flat surfaceprocess a series ofactions, changes, or functions bringing about a resultTechnical pertaining to the useful ormechanical arts, or to science or businessTechniciana person skilled in mechanical or industrialtechniques or in a particulartechnical fieldFlowcharta diagram that uses graphic symbols to depictthe nature and flow of thesteps in a processTool kit a small bag or box equipped with hand toolsTreestructure an algorithm for placing and locating files in an organized databaseVideo displayterminal acomputer terminal having a video display that uses a cathode-ray tube.VDTVideo DisplayTerminalDefinition of TermsAcronym

50.COMPUTER HARDWARE SERVICING 49K to 12Technology and Livelihood Education1.Workshop2. Tables and Chairs3. Computers4. USB Flash Drive5. LCD6. Drawing

ToolsMaterialsIdentify different kinds of technical drawingLEARNING OUTCOME 11. Correcttechnical drawing is selected according to job requirements.2. Technical drawings are segregated inaccordance with the types and kindsof drawings.3. Components, assemblies or objects arerecognized as required.PERFORMANCE STANDARDS

51.COMPUTER HARDWARE SERVICING 50K to 12Technology and Livelihood EducationA.Directions: Match Column A with Column B. Write only the letter of the correctanswer on a separatesheet of paper.Column AColumn B1. It is represented by a rectangle. It refers to anaction in abusiness process.a. Decision2. It is represented by a diamond. A process that cananswer a decision


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answers.4. Circle. A circle indicates that a particular step is connected to another page or part oftheFlowchart. A letter placed in the circle clarifies the continuation.5. Triangle. A triangle shows wherean in-process measurement occurs.

55.COMPUTER HARDWARE SERVICING 54K to 12Technology and Livelihood EducationFig 1.Example of a Simple FlowchartNO YesYESStartProcessDecisionProcessProcessEnd

56.COMPUTER HARDWARE SERVICING 55K to 12Technology and Livelihood EducationA.Directions: Match Column A with Column B. Write only the letter of the correctanswer on a separatesheet of paper.Column A Column B1. Indicates that a particular step is connected toanother page orpart of the flowcharta.2. Shows a decision point, such as yes/no or go/no-go.b.3. Indicates both thestarting point and the endingpoint of the process stepsc.4. Shows where an in-processmeasurement occursd.5. Represents an individual step or activity in theprocesse.f.Refer to theAnswer Key. What is your score?How Much Have You Learned?Self-Check 1.1

57.COMPUTER HARDWARE SERVICING 56K to 12Technology and LivelihoodEducationDirections: Using the basic symbols used for flowchart, make your own simple flowchart toillustrate the process of cleaning the computer parts and peripheralsproperly. Include the givenactivities below.1. Preparation of cleaning tools2. Identifying the parts to be cleaned3. Cleaning the

different peripheralsScoring RubricsPreparation ofFlowcharts4 3 2 1Drawing All assigneddetailsandelements havebeen added. Thedetails are clearand easy toidentify.Almost allassigned details

/elements (atleast 85%) havebeen added. Thedetails are clearand easy toidentify.Almost allassigneddetailsand elements (atleast 85%) havebeen added. Afew details aredifficult toidentify.Fewer than85%of the assigneddetails andelements arepresent OR mostdetails aredifficult toidentify.Find out byaccomplishing the Scoring Rubric honestly and sincerely.Remember it is your learning atstake!Show that you learned something by doing this activity.How Well Did You Perform?HowDoYouApplyWhatYou HaveLearned?Operation Sheet 1.1

58.COMPUTER HARDWARE SERVICING 57K to 12Technology and Livelihood Education1.Workshop2. Tables and Chairs3. Computers4. USB Flash Drive5. LCD6. DrawingToolsMaterialsInterpret technical drawingLEARNING OUTCOME 21. Dimensions of the key featuresof the objects are depicted in the drawingcorrectly identified.2. Symbols used in the drawing are

identified and interpreted correctly.3. Drawing is checked and validated against job requirements orequipment inaccordance with standard operating procedures.PERFORMANCE STANDARDS

59.COMPUTER HARDWARE SERVICING 58K to 12Technology and LivelihoodEducationDirections: Interpret the flowchart.YesWhat Do You Already Know?Pretest LO 2Let usdetermine how much you already know about interpreting of technicaldrawing. Take thistest.BeginREAD RECORDNOT !EOFCLOSE FILEPRINT BLANKLINEEndOPENFILENOYESPRINT NAMEPRINT STREETPRINT CITYAAPRINT TWOBLANK LINES

60.COMPUTER HARDWARE SERVICING 59K to 12Technology and Livelihood EducationHow doyou interpret flowcharts?A Flowchart will help you understand your process and uncover ways toProvide training on how the process works orshould work.Below is a sequence of steps that will helpyou throughan orderly analysis of your flowchart.Step 1 - Examine each process step for thefollowing conditions that indicate a need toimprove the process:Bottlenecks. These points in theprocess where it slows down may be caused by redundantor unnecessary steps, rework, lack ofcapacity, or other factors.Weak links. These are steps where problems occur because of inadequatetraining ofprocess workers, equipment that needs to be repaired or replaced, or insufficienttechnicaldocumentation. "Inform the drill leader and improvise" is one of the weak links.Poorlydefined steps. Steps which are not well-defined may be interpreted and performed ina different wayby each person involved, leading to process variation. "Improvise" is a poorlydefined step in theweak link cited above.Step 2 - Examine each decision symbol. You may want to collect data on howoften thereis a "yes" or "no" answer at decision points marked by a diamond shaped symbol. If


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mostdecisions go one way rather than the other, you may be able to remove this decision point.WhatDo You Need To Know?Information Sheet 2.1Read the Information Sheet 2.1 very well then find out

how much you canremember and how much you learned by doing Self-check 2.1.EExxaammiinneeLocate cost-added-only steps.Determine how to implement changes to theprocess.Identify waysto streamline the process.Form theories about root causes.Determine who is involved in theprocess.improve it only ifyou use it to analyze what is happening. Interpreting your Flowchart will

helpyou to :

61. Determine what is not included in the scope of the process to remove anydoubt or confusion aboutthe boundaries. This may also help establish thescope of related processes.4. List the steps,activities, and decisions to be charted. If your team is not sureabout a step, mark it to be investigatedlater.5. Put the steps in chronological sequence. Sometimes its easier to start with thelast step andwork back to the first step.6. Assign flowchart symbols such as boxes, diamonds, and triangles.7.

Review and title the Flowchart.Identify the major activities or sub processes that are included in theprocess.COMPUTER HARDWARE SERVICING 60K to 12Technology and LivelihoodEducationStep 3 - Examine each rework loop. Processes with numerous checks generatereworkand waste. Examine the activities preceding the rework loop and identify thosethat need to beimproved. Look for ways to shorten or eliminate the loop.Step 4 - Examine each activity symbol.Does the step help build a key qualitycharacteristic into the end product? If not, consider eliminatingit.Types of flowchartBesides the three levels of detail used to categorize Flowcharts, there are threemaintypes of flowcharts namely , linear, deployment, and opportunity. The level of detailcan bedepicted as macro, mini, or micro for each of these types.1. Linear Flowchart. A linear flowchart is adiagram that displays the sequence ofwork steps that make up a process. This tool can help identifyrework andredundant or unnecessary steps within a process.2. Deployment Flowchart. Adeployment flowchart shows the actual process flowand identifies the people or groups involved ateach step. Horizontal lines definecustomer-supplier relationships. This type of chart shows wherethe people orgroups fit into the process sequence, and how they relate to one anotherthroughout theprocess.How do we construct a linear flowchart?Following are the seven steps for developing alinear flowchart1. Define the process to be flowcharted, and the purpose for flowcharting it.2.Assemble the right people to develop the flowchartthose operators, technicians,or office workerswho are actually involved in the process.3. Establish process boundariesthe starting and ending

points.

62.COMPUTER HARDWARE SERVICING 61K to 12Technology and Livelihood EducationDirections: Arrange the following steps in developing a flowchart . Put the number on aseparate sheet ofpaper.____________Define the process to be flowcharted, and the purpose for flowchartingit.____________Establish process boundaries - the starting and ending points.____________Putthe steps in chronological sequence. Sometimes its easier to startwith the last step and work back tothe first step.____________Assign flowchart symbols such as boxes, diamonds, andtriangles.____________Review and title the flowchart.____________Assemble the right people todevelop the flowchartthose operators,technicians, or office workers who are actually involved inthe process.____________List the steps, activities, and decisions to be charted. If your team isnotsure about a step, mark it to be investigated later.Directions: Analyze carefully the given taskbelow: Work in a group (5 members each) anddevelop a flowchart based on the given situation

below.Your task:You are a member of a product assembly team in a gaming machine manufacturerandare looking for ways of building the product more efficiently. You are asked to break downtheassembly process into a set of flowcharts, showing how sub-assemblies are made andthen built intothe final product. Present your developed flowchart to the team leader.Refer to the Answer Key.What is your score?Show that you learned something by doing this activity.How Much Have YouLearned?Operation Sheet 2.1Self-Check 2.1HowDo YouApplyWhatYou HaveLearned?

63.COMPUTER HARDWARE SERVICING 62K to 12Technology and Livelihood EducationScoringRubrics:You will be graded according to:1. Clarity of your flowchart2. Completeness3. Accuracy4.


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presentationCriteria Points Your Score1. Clarity2. Completeness3. Accuracy4. Class presentationofyour chart25252525Total 100Interpretation of Scores97100 Excellent8696 Very Good7585Good5175 Fair50 and below PoorFind out by accomplishing the Scoring Rubric honestly andsincerely.Remember it is your learning at stake!How Well Did You Perform?Congratulations! You dida great job!Rest and relax a while then move on tothe next lesson. Good luck!

64.

http://www.agmachine.com/xmmd43d.htmREFERENCEShttp://library.thinkquest.org/TQ0312380/machine.htmLO 3http://www.eod.gvsu.edu/~blaucha/c2d2/Structured%20Design%20Using%20Flowcharts.pdfwww.edrawsoft.com/flowchart.phpwww.tesda.gov.phLO 2www.patton-patton.com/basic_flow_chart_sy.http://www.lakelandwww.breezetree.com/.http://machineshop.olin.edu/resources/documents/Technical%20Drawing%20-

%20Class%20Handout.pdfCOMPUTER HARDWARE SERVICING 63K to 12Technology andLivelihood EducationLO1

65.COMPUTER HARDWARE SERVICING 64K to 12Technology and Livelihood EducationPracticeOccupational Safety and HealthLESSON 4LO 1. identify hazards and risk ;LO 2. evaluate hazardsand risk ; andLO 3. control hazards and risk.LEARNING OUTCOMES:At the end of this Lesson, youare expected todo the following:

66.COMPUTER HARDWARE SERVICING 65K to 12Technology and Livelihood EducationChemicalhazard Any hazard that results from the accidental exposure to toxicchemical.Desktop computer Is apersonal computer (PC) in a form intended for stationaryuse.Electric shock Characterized by painand muscular spasm caused by anelectric current.Elimination The process of removing the hazardfrom the workplace.Ergonomics The science of designing the workplace environment to fittheuser.Hazard A situation that has the potential to harm the health and safetyof people.Hazardcontrol The development of systems to prevent accidents or injuries.Health The general condition ofa person in all aspects.Housekeeping Is the systematic process of making a home neat andcleanand in order.Risk A potential hazardous condition that a chosen action oractivity causes.Riskmanagement The process of analyzing exposure to risk and managing it.Safety The state of being"safe".Standards Something accepted as a basis for comparison.Tree structure An algorithm for

placing and locating files in an organizeddatabase.OSH Occupational safety and healthPPEPersonal protective equipmentDefinition of TermsAcronyms

67.COMPUTER HARDWARE SERVICING 66K to 12Technology and Livelihood Education1.Workplace2. Personal protective equipment (PPE)3. Learning guides4. Hand-outs- Organizationalsafety and health protocol- 5S- Hazards/risk identification and control5. CDs, VHS tapes,transparenciesMaterialsIdentify hazards and riskLEARNING OUTCOME 11. Workplace hazards andrisks are identified and clearly explained.2. Hazards/risks and their corresponding indicators areidentified in accordancewith the company procedures.3. Contingency measures are recognized andestablished in accordance withorganizational procedures.PERFORMANCE STANDARDS

68.COMPUTER HARDWARE SERVICING 67K to 12Technology and Livelihood EducationA.Directions: Identify the type of hazards. Match Column A with Column B. Write onlythe letter of each

correct answer on a separate sheet of paper.Column A Column B1. cables running across thefloor1.mechanical hazard2. hot components or sharpedges of computers2. physical hazard3. inkjet printercartridge 3. electric shock hazards4. exposed power cable 4. chemical hazard5. open casing ofcomputermonitor5. CRT monitor high voltagehazardB. Identify the 5S principles and give (1)example for each principle.1.

__________________________________________________________________Example :_________________________________________________________2.__________________________________________________________________Example :_________________________________________________________3.


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__________________________________________________________________Example :_________________________________________________________4.__________________________________________________________________Example :_________________________________________________________5.__________________________________________________________________Example :_________________________________________________________What Do You Already

Know?Pretest LO 1Let us determine how much you already know about hazards and risks. Takethistest.

69. noisy machinery (could result in damage to your hearing)During work experience, you must remainalert to anything that may be dangerous. If yousee, hear or smell anything odd, take note. If youthink it could be a hazard, tell someone.What Do You Need To Know?Information Sheet 1.1ReadInformation Sheet 1.1 very well then find out how much you can rememberand how much you

learned by doing Self-check 1.1.Spot thehazardsboxes stacked precariously (they could fall onsomeone)frayed electrical cords (could result in electrical shock)COMPUTER HARDWARESERVICING 68K to 12Technology and Livelihood EducationHazard Identification, RiskAssessment, and Risk ControlOccupational safety and health (OSH) is a planned system of workingto prevent illnessand injury where you work by recognizing and identifying hazards and risks. Healthandsafety procedure is the responsibility of all people in the computer and technology industries.You

must identify the hazards where you are working and decide how dangerous they are.Eliminate thehazard or modify the risk that it presents. This Module is intended to give yousome guidelines andadvice on common areas of health and safety problems in thecomputer industry and to help you gaina general awareness of your responsibilities as userand technician in a safe environment.There arethree steps used to manage health and safety at work:1. Spot the Hazard (Hazard Identification)2.Assess the Risk (Risk Assessment)3. Make the Changes (Risk Control)At work you can use thesethree Think Safe steps to help prevent accidents.Using the Think Safe Steps1. Spot the HazardKeyPointA hazard is anything that could hurt you or someoneelse.Examples of workplace hazardsinclude:

70. Tell your supervisor if you think a work practice could be dangerous.If you are not sure of the safestway to do something during work experience, always askyour work experience supervisor.3. Makethe ChangesKey PointIt is your employers responsibility to fix hazards. Sometimes you may be ableto fix simplehazards yourself, as long as you dont put yourself or others at risk. For example, youcanpick up things from the floor and put them away to eliminate a trip hazard.Common hazardsencountered by computer technicians and usersA hazard is a situation in the workplace that has thepotential to harm the health and safetyof people or to damage plant and equipment. The situationcould involve a task, chemical orequipment used. Hazard management is a continuous process thatcan be used to improvethe health and safety of all workplaces.Physical HazardsOne of the mostcommon physical hazards involvingcomputer technicians is cables running across the floor.Ifsomeone trips, falls, and hurts himself because of a cableyou ran across the floor, someone (you,

your employer, oryour customer) has a serious legal negligence problem. IfAsk for help moving orlifting heavy objects.Ask your supervisor for instructions and training before using equipment.Howbadly could I or someone else be harmed?Always tell someone (your employer, your supervisor oryour health and safetyrepresentative) about hazards you cant fix yourself, especially if the hazard

could causeserious harm to anyone.For example:How likely is it that the hazard could harm meorsomeone else?COMPUTER HARDWARE SERVICING 69K to 12Technology and LivelihoodEducationPPhhyyssiiccaall hhaazzaarrddssAssess2. Assess the RiskKey PointAssessing the riskmeans working out how likely it is that ahazard will harm someone and how serious the harmcouldbe.Whenever you spot a hazard, assess the risk by askingyourself two questions:

71.COMPUTER HARDWARE SERVICING 70K to 12Technology and Livelihood Educationyou needto temporarily run a cable across the floor, place a Danger sign similar to those"wet floor" signs usedby cleaning services.For cables that are temporary but will need to run across the floor for a longer


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period of time,use "gaffers tape". Gaffers tape is a heavy tape with strong adhesive to stick to thefloor. Itcomes in a wide range of colors, from unintrusive matte black to hazard warning red.Althoughit has strong adhesive, it can be removed easily and cleanly.For long term cable routing there is awide variety of cable organizing devices like cable ties,cable wraps, and cable raceways which canbe used to run cable safely along the wall orceiling.Other common physical hazards include leavingtools on top of ladders and placingelectronic equipment in precarious positions or on support that is

not sturdy enough or notdesigned for holding electronic equipment.Mechanical HazardsWhenworking on electronicequipment, ask yourself "Is thereany way this equipment could hurtme?. Youmight stick your hand in aprinter and suddenly the paper feedarm moves, feeding not onlypaperthrough the printer, but a piece ofyour finger too.You might move your hand past a computerchassis and lose a chunk of flesh because it israzor sharp. When working on electronic equipmentalways be alert to any possibility ofbeing hurt by moving parts, hot components, or sharpedges.Chemical HazardsThere is a wide array of chemicals used withelectronic equipment. Thereare display cleaningchemicals, keyboard cleaning chemicals,compressed gas dirt and dustremovers, and manycleaning solvents. Some of these chemicals can beharmful if accidentallyswallowed, get on bare skin,or get in eyes. Before using any chemicals forelectronic equipmentalways read the warnings andinstructions on the label.Also be very careful when dealingwith inkjetprinter cartridges, or laserprinter toner cartridges. Ink and toner can stain skin, clothing, andcarpet.Electric Shock HazardInside computers and electronic equipment, there is a range of

voltagesfrom 3.3 volts to 25 volts, most of these are harmless. But at the powersupply, youll find linevoltage, which is a lethal 220 volts.mmeecchhaanniiccaall hhaazzaarrddss

72.COMPUTER HARDWARE SERVICING 71K to 12Technology and Livelihood EducationMost ofthe time while working inside computers and electronic equipment, youll want themunplugged fromthe wall socket. If you need to work on equipment while it is still plugged inor powered up, remove all

jewelry and wrist watches.If you must work inside a line power distribution box, wear an electriciansrubber insulatedgloves and safety glasses. You might think you dont need these safety devicesbecause youare going to be extra careful, but one little slip could cause a flaming explosion thatcouldtake off your hand, embed shrapnel in your eyes, or conduct electricity through yourheart,where it takes only 10 milliamps (0.01) to kill a human.- CRT Monitor High-Voltage HazardCRTmonitors are becoming less common nowadays, butshould you run into one, it is best NOT to open itup.Instead, outsource any CRT repair job to a qualified CRTrepair service. A CRT monitor has ahigh-voltage anodeinside it, which can carry a charge of up to 25,000 volts,and it can still be holdinga high charge days after thepower is removed.If you must open a CRT monitor case for somereason,be sure to study the proper way to discharge a CRTbefore you proceed. It involves using a

jumper wire and aflat blade screwdriver to shorten the anode to ground.After being discharged, evenwith no power connection,the anode voltage will actually build up again. So youhave to repeatedlydischarge it.A. Direction: Read carefully each statement below. Place T on the line if the statementisTRUE. Place F if the statement is FALSE._____ 1. Health and safety procedure is theresponsibility of all persons in the computerand technology industries.______ 2. Spotting thehazards means working out how likely it is that a hazard will harmsomeone and how serious theharm could be.______ 3. If you need to temporarily run a cable across the floor, place a Danger signsimilarto those "wet floor" signs used by cleaning services.______ 4. An LCD monitor has a high-voltage anode inside it, which can carry a charge ofup to 25,000 volts, and it can still be holding a

high charge days after the power is removed.______ 5. Inkjet printer cartridges, or laser printer tonercartridges are hazardous to users.How Much Have You Learned?Self-Check 1.1

73.Refer to the Answer Key. What is your score?Show that you learned something by doing this

activity.Operation Sheet 1.1HowDo YouApplyWhatYou HaveLearned?Describe therisksCOMPUTER HARDWARE SERVICING 72K to 12Technology and LivelihoodEducationB. Direction : Identify what hazard is being illustrated in the situation below .__________ 1.Slippery computer laboratory floor__________ 2. Hot components, or sharp edges of computerdevices__________ 3. Laser printer toner__________ 4. Obstructed electrical cables__________ 5.


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improvement programs. Thus, it is often said thatthe road to productivity starts with 5S and through5S you can create a highly productivecompany with highly productive people. 5S is not only a matterof good housekeeping. It is aprocess to create more productive people and more productivecompanies throughmotivation, education, and the practice of 5S. It involves the creation of a strongcorporateculture filled with the spirit filled with the spirit of high productivity.1. Seiri Sorting/Puttingthings in order (Remove/discard what is not needed so thatthere are fewer hazards and less clutter

to interfere with work. Only keep what isneeded.)2. Seiton Orderliness/Proper Arrangement (Placethings in such a way that they canbe easily reached whenever they are needed. "There must be aplace for everything,and everything must be in its place.")What Do You Need To Know?InformationSheet 1.2Read the Information Sheet 1.2 very well then find out how much you canremember andhow much you learned by doing Self-check 1.2.AAppppllyy 55ss oonnyyoouurr ccoommppuutteerr

77. If you are migrating to a different computer or keeping multiple computerssynchronized, the Desktop

folder is often missed.If you are only backing up My Documents, items on the Desktop may beskipped.When the desktop gets too full, you waste time cleaning temporary/downloaded files.Youdont know immediately where to place new files (downloaded files, attachments,temporary working

documents, etc)Files, folders, and application shortcuts are grouped together without anylogicalseparation.It is difficult to find what youre looking for.COMPUTER HARDWARESERVICING 76K to 12Technology and Livelihood Education3. Seiso Clean/cleanliness. (Keepworkplace and things clean and polished; no trashor dirt in the workplace)4. SeiketsuStandardize/Purity (Maintain cleanliness after cleaning, consistently-perpetual cleaning. Suchcleaning is part of every ones work.)5. Shitsuke Sustaining/discipline/commitment (Maintainstandards and keep the facilityin safe and efficient order day after day, year after year.)Example #1:

Am I at lost?Its not unusual for you to see a computer desktop on your classmates desk thatlookssomething like this:You may have seen even worse. Keeping your desktop so cluttered like thiscreatesmany problems such as:

78.COMPUTER HARDWARE SERVICING 77K to 12Technology and Livelihood EducationWhat canyou say about the desktop illustrated?How can you make sure that the above problems will not beencountered?Consider setting up your files in the tree structure format.A tree structure is analgorithm for placing and locating files in an organized database. Thealgorithm finds data by

repeatedly making choices at decision points called nodes. A nodecan have as few as two branches(also called children), or as many as several dozen.In a tree, records are stored in locations calledleaves. This name derives from the fact thatrecords always exist at end points; there is nothingbeyond them.The folder names do not necessarily tell the user what is inside them, making it difficultforyourself and others to find. Also, the folders that are inside dont necessarily belong there orfit withthe other files.Sortits the best thing that you can doTired of icon clutter on your desktop? Sure,you can organize your desktop shortcuts,programs, folders, and the like by dragging and dropping,but eventually some game or otherscreen resolution-changing app will undo all your hard work.

79.COMPUTER HARDWARE SERVICING 78K to 12Technology and Livelihood EducationMakeYourself a Desktop CleanerYour desktop is the first thing you see when you start your computer.This should be themost organized part of your electronic workspace. But what if your desktop lookslike this?What will be the impressions on your classmates?The Desktop offers many features that

make using your computer easier. You can easilystart programs or applications, copy and move filesfrom one place to another and drag anddrop files and program where you want them on thecomputer or even on to a programsicon to open a file.Manage Your Own DesktopNumerous studieshave shown that your environment affects your productivity, and that evensomething as simple ascolor can influence your memory or creativity. Since most of ourwork now is done in the digitalrealm, it stands to reason that your desktop environment canplay an important role in yourproductivity.Your computers desktop is a starting point for your entire computing experience, butlikeanything else if you let it get ugly and messy your productivity will take a dive. Heres howtodesign and create an attractive desktop with built-in organization to keep your workspacenice,


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clean, and productive with minimal effort.How to manage your desktop:1. Create 5 folders in MyDocuments called :

80. Archive - Put completed projects, general reference items, and anythingelse you might want to lookat again in hereTip: By placing the underscore in front of the name of the file folder, it will forcethefolder to display at the top of the list in My Documents.2. Now move all relevant files from your

desktop into these folders. If you have alarge number of files, you can move everything into theInbox folder and organizeit later.3. All that should be left on the desktop is programicons.Directions: Match the 5S principle that is needed or depicted in the following pictures.Column

A Column B1. Seitona.2. Seirib.How Much Have You Learned?Self-Check 1.2Current Projects -Put files related to active projects in here. This foldercontains files youre currently working on as

well as reference files for aproject. Each project gets its own unique folder.On Hold - Put items youarent yet ready to do or complete in here. Thesemay be articles youre thinking of reading, sketches

for potential projects,and information about classes youre thinking about taking.Action Items - Putitems requiring an action that takes more than 2minutes in here. These may be items such as forms

to fill out, largeapplications to install and setup, and files to upload.Inbox - Put unprocessed itemsthat dont have a place yet in here. Thismay be items like software installers youve downloaded,

files sent to youfrom colleagues, and random text clippings.COMPUTER HARDWARE SERVICING79K to 12Technology and Livelihood Education

81.COMPUTER HARDWARE SERVICING 80K to 12Technology and Livelihood EducationPleasefollowour ComputerLaboratoryRules andregulations3. Seiketsuc.4. Seiso d.5. Shitsukee.f.Refer tothe Answer Key. What is your score?

82.COMPUTER HARDWARE SERVICING 81K to 12Technology and LivelihoodEducationDirections: Organize your desktop. Name the folders below and organize your owndesktopby sorting the given files accordingly.Files File folder name1. YouTube downloader 1.2.House.jpeg 2.3. Firezilla 3.4. Deped memorandum .pdf 4.5. Letter to the principal .doc 5.6. Groupproject proposal 6.7. Proposed program of activities 7.8. School.jpeg 8.9. Video of the schoolactivities 9.10. My resume.doc 10.11. Harry Potter movie 11.12. School Hymn 12.13. Teach me howto doggy.mp3 13.14. List of activies.doc 14.15. Importance of Facebook usage.ppt 15.Show that you

learned something by doing this activity.Operation Sheet 1.1HowDo YouApplyWhatYouHaveLearned?3.5.4.2.1.

83.COMPUTER HARDWARE SERVICING 82K to 12Technology and Livelihood EducationScoringRubricsCriteria Points My Score1. Accuracy 502. Speed 253. w/o Assistance 25Total 100Find out byaccomplishing the Scoring Rubric honestly and sincerely.Remember it is your learning at stake!HowWell Did You Perform?

84.COMPUTER HARDWARE SERVICING 83K to 12Technology and Livelihood Education1.Workplace2. Personal protective equipment (PPE)3. Learning guides4. Hand-outs- Organizationalsafety and health protocol- 5S- Hazards/risk identification and controlMaterialsEvaluate hazards andriskLEARNING OUTCOME 21. Effects of hazards are determined.2. OSH issues and concerns areidentified in accordance withworkplace requirements and3. Relevant workplace OSH

legislation.PERFORMANCE STANDARDS

85.COMPUTER HARDWARE SERVICING 84K to 12Technology and Livelihood EducationDirection:Read each statement below carefully. Place T on the line, if you think astatement is TRUE. Place F,if you think the statement is FALSE._____ 1. Your knees should be bent at a comfortable angle andgreater than 90 degreesflexion when sitting in front of a computer._____ 2. A well designed mouseshould not cause undue pressure on the wrist andforehead muscles._____ 3. Set the eye to screendistance that permits you to most easily focus on the screen._____ 4. Changing posture at frequentintervals maximizes fatigue when using a computer._____ 5. Place the keyboard in a position that


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allows the forearms to be close to thehorizontal and the wrists to be straight._____ 6. It isrecommended that operators avoid spending more than five hours a day onkeyboard duties and nolonger than 50 minutes per hour without a postural/stretching break._____ 7. To detect whetherthere are reflections from the desk surface, the worker shouldhold the book below the surface andassess the change in reflected glare from the screen._____ 8. 10,000 - 12,000 keystrokes per houris considered an acceptable standard intyping._____ 9. Good posture is essential for all users of

computers._____ 10. The solution is to increase the refresh rate of the monitor to at least 75hz.WhatDo You Already Know?Pretest LO 2Let us determine how much you already know about theevaluation of hazardsand risk. Take this test.

86. The location of furniture in the roomWhat Do You Need To Know?Information Sheet 2.1Read theInformation Sheet 2.1 very well then find out how much you canremember and how much you

learned by doing Self-check 2.1.The layout of equipment on the deskThe accessories required tooperate properlyCOMPUTER HARDWARE SERVICING 85K to 12Technology and LivelihoodEducationComputer Workstation ErgonomicsThere are various health problems associated with theregular use of computers, such asstress, eyestrain, and injuries to the wrists, neck, andback.Employers must take steps to protect employees whose work involves the regular useofcomputers.Computer ergonomics is the discipline of matching the task to the worker using themostappropriate equipment to optimize human well-being and overall performance.This can be

simplified to Modify the workplace, not the individual".Consideration should be given to:

87.COMPUTER HARDWARE SERVICING 86K to 12Technology and Livelihood EducationWorksurface heightAdjust the height of the work surface and/or theheight of the chair so that the worksurface allowsyour elbows to be bent at 90 degrees, forearmsparallel with the floor, wrist straight,shouldersrelaxed.ChairAdjust the seat tilt so that you are comfortable whenyou are working on thekeyboard. Usually, this will beclose to horizontal but some people prefer theseat tilted slightlyforwards. Your knees should bebent at a comfortable angle and greater than 90degrees flexion. Ifthis places an uncomfortable strainon the leg muscles or if the feet do not reach the floorthen afootrest should be used. The footrest heightmust allow your knees to be bent at 90degrees.Therefore the height of the footrest may need to beadjustable. Adjust the backrest so that itsupports thelower back when you are sitting upright.Keyboard placementPlace the keyboard in aposition that allows theforearms to be close to the horizontal and the wrists tobe straight. That is,with the hand in line with theforearm. If this causes the elbows to be held far outfrom the side of thebody then re-check the worksurface height. Some people prefer to have their wristssupported on awrist desk or the desk. Be careful not tohave the wrist extended or bent in an up position.ScreenplacementSet the eye to screen at the distance that permits you to most easily focus on thescreen.Usually, this will be within an arms length. Set the height o