Quarter II: Maintaining and Repairing Electric Flat Irons PDF

# Quarter II ## Time Allotment: 40 Hours ## UNIT OF COMPETENCY: MAINTAIN AND REPAIR ELECTRONICALLY CONTROLLED DOMESTIC APPLIANCE ## I. INTRODUCTION: This lesson contains necessary information and suggested learning activities in Maintaining and Repairing an Electric Flat Iron. Additionally, pr...

# Quarter II ## Time Allotment: 40 Hours ## UNIT OF COMPETENCY: MAINTAIN AND REPAIR ELECTRONICALLY CONTROLLED DOMESTIC APPLIANCE ## I. INTRODUCTION: This lesson contains necessary information and suggested learning activities in Maintaining and Repairing an Electric Flat Iron. Additionally, pretesting and disassembling-assembling procedure of Electric Flat Iron are included to comply with the standard operating procedure. There are forms to accomplish for proper documentation. ## II. PRE/ DIAGNOSTIC ASSESSMENT **Directions:** Read each statement carefully and select the letter of the correct answer. Write your answer on a separate sheet of paper. 1. Tool used to join two pieces of metals. - A. Diagonal Cutting Pliers - C. Soldering Iron - B. Long Nose Pliers - D. Wire Stripper 2. Tool used to remove wire insulator from its conductor. - A. Soldering Iron - B. Diagonal Cutting Pliers - C. Long Nose Pliers - D. Wire Stripper 3. Part of Electric Flat Iron that regulates the temperature. - A. Heating Element - B. Selector Switch - C. Thermal Fuse - D. Thermostat 4. Part of Electric Flat Iron used to select the amount of heat - A. Heating Element - B. Selector Switch - C. Thermal Fuse - D. Thermostat 5. Indicates that electricity is flowing along the heating element. - A. AC Cord - B. Body/Case - C. Neon/Pilot Lamp - D. Sole Plate 6. A safety device used to cut-off the circuit when the temperature rises above normal. - A. Heating Element - B. Selector Switch - C. Thermal Fuse - D. Thermostat 7. The base metal part of electric flat iron that presses the fabric. - A. AC Cord - B. Body/Case - C. Neon/Pilot Lamp - D. Sole Plate 8. Connects the unit to power source. - A. AC Cord - B. Body/Case - C. Neon/Pilot Lamp - D. Sole Plate 9. Upon receiving a defective appliance, the technician should immediately - A. disassemble the unit for troubleshooting. - B. explain to the client the identified defects. - C. make an initial inspection/testing of the appliance. - D. conduct an initial interview to the owner of the appliance. 10. This procedure in Pre-Testing and Troubleshooting requires simple inspection by merely looking for burned, dented or dislocated parts. - A. Operate the device. - B. Perform visual inspection of the unit. - C. Test the unit for continuity using VOM. - D. Determine the specific problem by asking the symptom. ## III. LEARNING COMPETENCIES - **LO1: PREPARE UNIT, TOOLS, EQUIPMENT AND WORKPLACE FOR MAINTENANCE/REPAIR** - Prepare necessary tools, test instruments and personal protective equipment in line with job requirements. - Acquire service manuals and service information required for repair/maintenance as manufacturer's specifications. - Conduct complete check-up of electronically-controlled domestic appliances. - Document the identified defects based on check-up conducted. - **INFORMATION SHEET 1.1** - **TOOLS AND MATERIALS IN MAINTAINING ELECTRONICALLY-CONTROLLED DOMESTIC APPLIANCE (ELECTRIC FLAT IRON)** - In every electronic work, it is a must to prepare first the necessary tools, materials, and equipment needed as well as the information. The following list of tools, materials, and equipment are needed in maintaining and repairing electronically-controlled domestic appliance: - [Image of tools and materials] - **Soldering Iron** - **Long Nose Pliers** - **Diagonal Cutting Pliers** - **Soldering Lead** - **Desoldering Tool** - **Wire Stripper** - **Soldering Stand** - **Utility knife (Blade Cutter)** - **Multitester/ Volt-Ohm-Milliammeter (VOM)** - **Flathead Screwdriver** - **Philip Screwdriver** - **Mask** - **Non-Static Brush** - **Apron** - **ESDWrist Strap** - **Eye Protector/ Goggles** - **Gloves** - **Electrical Tape** - **INFORMATION SHEET 1.2** - **OPERATION OF AN ELECTRIC FLAT IRON, PARTS AND FUNCTIONS** - The domestic Electric Flat Iron was the first of the household heating devices to receive universal recognition. - From the power source at home, electricity flows through a flat cord passes through a thermal fuse and a temperature control going to the heating element. Heating element is insulated by a mica insulator from the body and it heats up the sole plate for the purpose of removing wrinkles from fabric. With the heat and the weight of the ironing plate, the fibers are stretched and the fabric maintains its new shape when cool. Some materials such as cotton require the use of water to loosen the intermolecular bonds. Many materials developed in the twentieth century are advertised as needing little or no ironing. - **Modern irons for home use can have the following feature:** - a method of setting the iron down - a thermostat to ensure maintenance of constant temperature - a temperature control dial (usually marked with types of cloth) - an electrical cord with heat resistant Teflon insulation - a steam features - a cord control/ anti-burn control/ energy-saving control/ cordless iron - [Image of an electric flat iron labeled] - **AC (flat) cord** - **Handle** - **Selector switch** - **Sole plate** - **Example of Common Electric** - [Image of a modern electric flat iron] - **Modern Flat Iron with Electronic Control** - **Basic Parts of Flat Iron** - **1. AC line cord** is used to connect the unit to power source. - [Image of the AC line cord] - **2. Selector Switch** is a type of switch used to select the amount of heat required in ironing different types of fabrics. It can be a rotary or slide type. - [Image of the selector switch] - **3. Thermal Fuse** i a safety protective device used to cut-off the circuit when the temperature rises at above normal as designed for the unit. It also protects the unit from damage when overheating and short circuit occurs. - [Image of the thermal fuse] - **4. Heating Element** is a form of nichrome wire that assembles properly inside the high temperature metallic tube in flat iron to provide heat. - [Image of the heating element] - **5. Soleplate** is a base metal that serves as fabric pressing part made of metal where the heating element is placed. - [Image of the soleplate] - **6. Handle** is the part of a flat iron by which it is carried or controlled. - [Image of the handle] - **7. Body/Case** is used to protect the internal parts of the flat iron and serve as shield for the heat and protection of the hand of the user. - [Image of the body/case] - **8. Neon/Pilot Lamp** is used to indicate that electricity is flowing along the heating element. - [Image of the neon/pilot lamp] - **9. Thermostat Assembly** is used to regulate the temperature. - [Image of the thermostat assembly] - **10. Electronic Control** is the added feature of modern electric flat iron which can act as timer or automatic power cut-off switch for additional protection. - [Image of the electronic control] - **Note:** To avoid a circuit from overload, do not operate another high wattage appliance on the same circuit. If an extension cord is absolutely necessary a 16A cord should be used with a 220V iron. Cords rated for less amperage may overheat. Care should be taken to arrange the cord so that it cannot be pulled or rippledover. - **Sample Schematic Diagram** - [Image of the schematic diagram] - **Parts of Thermostat Assembly** - [Image of the parts of thermostat assembly] - **SELF CHECK 1.1** - **Identifying the Parts and Functions of an Electric Flat Iron** - **Directions:** Name the parts of an electric flat iron and give their function. Write your answers on another sheet of paper. - [Image of the parts of the flat iron] - **1. [Image of the AC line cord]** - **2.[Image of the selector switch]** - **3. [Image of the thermal fuse]** - **4. [Image of the heating element]** - **5. [Image of the soleplate]** - **6. [Image of the handle]** - **7. [Image of the body/case]** - **8. [Image of the neon/pilot lamp]** - **9. [Image of the thermostat assembly]** - **10. [Image of the electronic control]** - **Note:** If you got all the answers right, that is an excellent mark. If you missed one or more item/s, review the questions, go back to information sheet 1.3, and study them more closely. Before you proceed to the next lesson you must got all the answers right. - **SELF CHECK 1.2** - **Schematic Diagram of an Electric Flat Iron (Without the Electronic Control)** - ** Directions:** Bring an Electric Flat Iron which will serve as reference in drawing the schematic diagram. Use a separate sheet of paper and pencil in performing this. - **Criteria** - **Complete diagram with labels.** - **With one missing component or label** - **With 1 missing component and label** - **With 2 missing component or label** - **With 2 missing component and label** - **With more than 3 missing components or labels** - **Points** - 10 - 8 - 6 - 4 - 2 - 0 - **Note:** If the student has drawn the schematic diagram accurately, that is an excellent mark. If the diagram is erroneous, let the student review the questions, and review information sheet 1.2 Operation of an Electric Flat Iron, Parts and Functions, and study them more closely. Before you proceed to the next lesson you should have master this activity. - **INFORMATION SHEET 1.3** - **HEATING AS ONE OF THE EFFECTS OF ELECTICITY** - As the famous saying goes “Energy cannot be created or destroyed, it can only be changed from one form to another” by Albert Einstein. - In line with this, electricity is also converted into another usable power like heat. When an electric current flow through a wire some loss occurs and this loss is almost inevitable, more the resistance of wire, more the loss. This loss is due to the electrical resistance of wire is mainly responsible for the heating effect of electric current. - The more electrical resistance of the wire, the more generated heat. The fixed atoms of the wire resist the flow electrons and as a result, there are collisions and as the kinetic energy converts into heat energy we see that the wire is getting hot. - Electric heating has several advantages: it can be precisely controlled to allow a uniformity of temperature within very narrow limits; it is cleaner than other methods of heating because it does not involve any combustion; it is considered safe because it is protected from overloading by automatic breakers; it is quick to use and to adjust; and it is relatively quiet. For these reasons, electric heat is widely chosen for industrial, commercial, and residential use. - Resistance heaters produce heat by passing an electric current through a resistance: a coil, wire, or other obstacle which impedes current and causes it to give off heat. Heaters of this kind have an inherent efficiency of 100% in converting electric energy into heat. Devices such as electric ranges, ovens, hot-water heaters, sterilizers, stills, baths, furnaces, and space heaters are part of the long list of resistance heating equipment. - **INFORMATION SHEET 1.4** - **BASIC CONCEPT OF ELECTRONIC CONTROL (TRANSISTOR TIMER)** - Timer has a wide variety of uses specially when used with relay to include auto shut-off for safety of electrical appliances. For our lesson we will be concentrating in the timer using basic components like transistor, capacitor, resistor, and LED. When the circuit is powered by a 9V battery the LED switches on. A switch is closed to start the timer causing the LED to switch off for a time period. After the time period is over, the LED will switch on again. - [Image of the circuit] - **ACTIVITY 1.1** - **Electronic Timer Control** - **Directions:** Construct the electronic timer control circuit using a breadboard. - **Resources:** - Breadboard - 1pc 9 V Battery or DC Power - Supply Diagram of Electronic Timer - 1pc 470/16v uF - Capacitor - 1pc 470 ohm 1/4w Resistor - 5 mm LED (preferably - 1pc 1K ohm 1/4w Resistor - 1pc 2N222 Transistor - 1pc 22K ohm 1/4w Resistor - # 22 Solid Wire (Jumper) - **Procedure:** - 5. Connect the components to the breadboard following the diagram and observing the correct pins of the Transistor, the polarity of the Capacitor and LED. - [Image of the breadboard diagram] - 6. Connect the power supply. When the battery is connected, the LED will light. Use jumper wire as switch. Close the switch to start the timer. After the timer has finished timing or "timed out", the LED will switch on again. - 7. Try using different capacitor value in the circuit to see the time period change. Using a 100uF capacitor will result in a very short time period. Using a 1000uF capacitor will result in a longer time period. - 8. If your project failed to work, review the procedures and/or check the condition of battery or power supply and other electronic components. - **Criteria for Functional Project** - **Directions:** Rate yourself on how competent you have applied the skill in pre-testing and diagnosing using the criteria below by checking on the appropriate box (points 1 to 5, 5 being the highest). Compute for the rating by multiplying each item by its corresponding percentage, divide it by 5 then multiply by 100. Get the sum of your ratings. - **Criteria** - **Workmanship** - **Use of Tools** - **Use of PPE** - **Speed** - **Housekeeping** - **%** - 5 - 3 - 1 - 5 - 5 - **POIN** - **TS** - 5 4 3 2 1 - **RATIN** - **G** - **Criteria** - **Workmanship** - **Use of Tools** - **Use of Personal Protective Equipment** - **SPEED** - **Housekeeping** - **Description** - Followed the steps accordingly/ Less 1 point for every missed procedure. - Used tools materials in right task/ Less 1 point for every misused. - Used PPE during the whole activity/ Less 1 point for every forgotten instances - Finished within the time/ Less 1 point for every five minutes delay - The workplace is clean before, during and after the activity/ Less 1 point for every dirt observed. - **ACTIVITY 1.2 RECEIVING_ELECTRONICALLY-CONTROLLED DOMESTIC APPLIANCE FOR MAINTAIN/REPAIR** - **Directions:** Provided with the defective domestic appliance use Maintain and Repair Form to gather and document the information about the appliance at hand. Follow the procedures below: - **Resources:** - Domestic appliance: Electric - Flat Iron Receiving/Check-up - Form - **Procedure:** - 1. Conduct an initial interview to the owner of the appliance. - Ask what the problem is. - Request for the details of the problem (how does it happen/since when/ nature of the problem) - 2. As serviceman, you must confirm the problem/ complain. - 3. Make an initial inspection/ testing of the appliance. - Physical appearance - Operating controls - Power cord - 4. Take note of the information gathered and observed. - 5. Accomplish Receiving and Repair Form. - **Receiving and Repair** - **Customer's name:** - **Address:** - **Product/ Brand name:** - **Serial no:** - **Complain:** - **Electric Flat Iron** - **EXTERNAL PARTS** - **AC Cord** - **Selector Switch** - **Soleplate** - **Handle** - **Body/Case** - **Neon/Pilot Lamp** - **CONDITION** - **GOOD** - **DEFECТІVE** - **Student's Signature** - **Teacher's Signature** - **Date Repaired** - **Date Checked** - **PERFORMANCE_CHECK_ 1.1 RECEIVING ELECTRONICALLY-CONTROLLED DOMESTIC APPLIANCE FOR REPAIR** - **Directions:** Read the questions and answer by checking the appropriate box. - **Tasks** - **1. Recorded the name and address of the owner?** - **2. Copied product/brand/name and serial number of the appliance?** - **3. Asked for complain and the remarks/condition of the appliance?** - **4. Verified complain on the condition of the appliance?** - **5. Accomplished checklist of appliance parts condition.** - **AC Cord** - **Selector Switch** - **Soleplate** - **Handle** - **Body/ Case** - **Neon/ Pilot Lamp** - **YES NO** - **TOTAL** - **Student's Signature** - **Teacher's Signature** - **Date Repaired** - **Date Checked** - **LO2. DIAGNOSE_FAULTS OF ELECTRONICALLY-CONTROLLED DOMESTIC APPLIANCES (ELECTRIC FLAT IRON)** - Observe systematic pre-testing procedure in accordance with manufacturer's instructions - Check and isolate circuits using specified testing procedure - Document results of diagnosis and testing accurately and completely within the specified timeframe - Explain identified defects and faults based on the result of diagnosis and testing - Provide data/information regarding the status and serviceability of the units as per procedure. - **INFORMATION SHEET 2.1 Procedure in Pre-Testing and Troubleshooting an Electric Flat Iron** - 1. Determine the specific problem by asking the symptom. - a. Ask the owner/operator of the electric fan of what is the symptom of the unit. - b. Request for the details of the symptom (how does the symptom happen) and how long it has been observed). - 2. Operate the device. Make sure that you know how to operate an electric flat iron. If not, review the operating manual as well as the service manual (if available) of the unit prior to its testing and operation - a. If you have worked on the same unit before, test out to see if it operates in the same way. - b. Determine the last time it has been modified/repaired. - c. You must recognize the symptom/complain of the owner to the unit. - 3. Perform visual inspection of the unit. - a. Prepare the tools needed and remove the cover ready for inspection. - b. Apply careful physical inspection of the parts/components. (Look for burned and broken components; Inspect for loose connections or broken wires) - 4. If all looks fine, test the unit for resistance checks. - a. Get the multitester and set it at range Rx1. Connect the test probes to each of the plug terminals, the reading must be infinite having the temperature control at zero position. - b. Then, adjust slowly the temperature control, decrease in resistance should be observed. If this happen, the unit might be in good condition. For safety, place one probe across to the plug terminals and the other probe to the body. There should be very high (infinite) resistance. If there's something different, refer to troubleshooting guide on this lesson. - 5. Record your findings for future reference. - **How to use an electric flat iron** - 1. Adjust the temperature selector to a minimum position before plugging cord into electrical outlet. - 2. Pre-heat the unit at least 2 minutes before using. - 3. To improve dry ironing results, sprinkle the garments with water evenly at least one hour before ironing. - 4. Unplug iron by gripping plug and pulling it from the outlet. Never pull the cord. - **Diagnosing and Troubleshooting Procedure/ Guide:** - **SYMPTOM:** Flat iron not energized. - **POSSIBL** - **E DEFECTIV** - **E PART** - **PROCEDURE** - **Power Cord** Measure the continuity of the power cord using ohmmeter. - **Thermal Fuse** Measure the continuity of the fuse using ohmmeter. - **Selector Switch** Check for the alignment of the switch to the thermostat. - **Thermostat** Measure the continuity of the power cord using ohmmeter. - **Heating Element** Measure the continuity of the heating element. - **CORRECTIVE MEASURE** - Replace power cord. - Replace fuse. - Align the selector switch. - Replace thermostat. - Replace heating element. - **SYMPTOM:** Intermittent Power or Heat - **POSSIBL** - **E DEFECTI** - **VE PART** - **PROCEDURE** - **Thermostat** Check the contact points for accumulated carbon or dirt. - **CORRECTIVE MEASURE** - Clean the contact points with fine sand paper. - Adjust the temperature knob if necessary. - **ACTIVITY 2.1 PRE-TESTING AND TROUBLESHOOTING ELECTRIC FLAT IRON** - **Directions:** Provided with the defective domestic appliance use Maintain and Repair Form to gather and document the information about the appliance at hand. Follow the procedures below. - **Resources:** - Domestic appliance: Electric Flat - Iron Activity Sheet/Forms - Tools & Equipment - Screwdriver - VOM - Cleaning - Materials PPE - **Procedure:** - 1. Perform the procedure and technique in pre-testing and troubleshooting a flat iron. - 2. Let one of your classmates act as the owner of the appliance. - 3. Accomplish receiving and repair form in your notebook, record the progress of your activity. - 4. Perform the procedures in accepting and repair in 30 minutes. - **Receiving and Repair** - **Customer's name:** - **Address:** - **Product/ Brand name:** - **Serial no:** - **Complain:** - **Electric Flat Iron** - **EXTERNAL PARTS** - **AC Cord** - **Selector Switch** - **Soleplate** - **Handle** - **Body/Case** - **Neon/Pilot Lamp** - **CONDITION** - **GOOD** - **DEFECТІVE** - **SYMPTOM:** - **POSSIBL** - **E DEFECTI** - **VE PART** - **PROCEDURE** - **CORRECTIVE MEASURE** - **Remarks:** - **Student's Signature** - **Teacher's Signature** - **Date Repaired:** - **Date Checked:** - **PERFORMANCE CHECK 3.1 PRE-TESTING AND DIAGNOSING/ TROUBLESHOOTING AN ELECTRIC FLAT IRON** - **Directions:** Rate yourself on how competent you have applied the skill in pre-testing and diagnosing electric flat iron using the criteria below by checking on the appropriate box (points 1 to 5, 5 being the highest). Compute for the rating by multiplying each item by its corresponding percentage, divide it by 5 then multiply by 100. Get the sum of your ratings. - **Criteria** - **Workmanship** - **Use of Tools** - **Use of Personal Protective Equipment** - **SPEED** - **House Keeping** - **%** - 50 - 30 - 10 - 5 - 5 - **Points** - **5 4 3 2 1** - **Rating** - **Criteria** - **Workmanship**` - **Use of Tools` - **Use of Personal Protective Equipment` - **SPEED` - **House Keeping` - **Description** - Followed the steps accordingly/ Less 1 point for every missed procedure. - Used tools/ materials in right task/ Less 1 point for every misused. - Used PPE during the whole activity/ Less 1 point for every forgotten instances - Finished within the time/ Less 1 point for every five minutes delay - The workplace is clean before, during and after the activity/ Less 1 point for every dirt observed. - **Student's Signature** - **Teacher's Signature** - **Date Repaired** - **Date Checked** - **LO3: REPAIR_AND MAINTAIN ELECTRIC FLAT IRON** - Use PPE in accordance with OHS practices - Perform repair activity within the required timeframe - Observe safety precautions in handling the unit/product as per standard operating procedure - Replace defective parts/ components with identical parts or recommended parts with equivalent - ratings - Solder/mount repaired or replaced parts/components in accordance with industry standards - Clean unit in accordance with standard operating procedure - **SELF CHECK 3.1 Personal Protective Equipment& OHS** - **Directions:** Identify sources of danger in your workplace according to target organs and give examples of PPE. In the absence of danger just indicate NONE. - **Organ** - **Eye** - **Ear** - **Head** - **Respir** - **atory** - **Body** - **Hand** - **and Arm** - **Foot** - **Source of Danger** - **PPE** - **Note:** PPE and OHS were discussed on previous quarter. The student should have identified all possible sources of danger in the workplace. If one or more item/s were missed, review the questions, go back to information sheet 3.1, and study them more closely. Before you proceed to the next lesson you must get all the answers right. - **INFORMATION SHEET 3.1 COMPONENT REPLACEMENT** - 1. Determine the description of the values and ratings of the individual defective parts using the manufacturer's service manual. - 2. Identify the sources of the replacement components/parts. - Original replacement components from the original factory sources - Universal replacement components from independent factory sources - 3. Consider the following factors in selecting parts. - Quality. The ability to provide exact value or specification to replacement part. - Tolerance. The ability to provide exact value or acceptable parametersto replacement parts. - Availability. The local access to parts and whether the parts are available - Price. Refers to the affordability of the replacement parts at a reasonable price. - 4. Disconnect or remove properly the electrical/mechanical parts of an electric flat iron. - 5. Install correctly the replacement parts and other components. - 6. For burnt components where values are impossible to recognize, secure a schematic diagram or service manual if possible. In other case, you can look for the same brand and model as reference. - 7. Double check the testing procedure in suspected defective components. - 8. Check the nearby components for possible consequence of being damaged too. - 9. Consider the original orientation/connection of the components in replacing defective one. - 10. Observe safety at all times. - **INFORMATION SHEET 3.2 TROUBLESHOOTING, MAINTENANCE AND CLEANING TIPS** - **Troubleshooting** - 6. Conduct a quick diagnosis of the trouble symptom and repair the defective set in the shortest possible time. Do not troubleshoot an electric flat iron unless you have determined the fault. - 7. Secure a circuit diagram. - 8. If the iron doesn't heat, make sure power is on to the outlet, check the electrical cord, and check the thermostat. - 9. Always suspect a faulty contact on mechanical switch circuit rather than defective electronic/electrical parts. - 5. If the iron produces too much or too little heat, test the electrical cord for loose wiring and connection. Also test and, if needed, adjust calibration of the thermostat. - 6. Use Personal Protective Equipment. - **Maintenance and Cleaning** - 1. Turn-off and unplug the electric flat iron and make sure it's cool before cleaning. - 2. Check the owner's manual for your iron to learn the specified manufacturer's suggestions for cleaning. - 3. You may use a sponge and commercial soleplate cleaner or baking soda and water to remove dirt buildup on the soleplate. Rinse well with water and dry. Don't submerge an electric flat iron in water or cleaning liquid. If needed, use very fine emery cloth or sand paper to remove scratches and burns on the soleplate. Don't use harsh abrasives. - **ACTIVITY SHEET 3.1 Maintain and Repair an Electric Flat Iron** - **Resources:** - Service manual of Electric Flat - Iron Electric Flat Iron - Activity sheet/ Forms (Copy from - module) Tools and Equipment Needed - Pliers - Screwdrivers - VOM - Cleaning - materials PPE - **Directions:** - 1. Provided with the resources, perform the maintenance/repair procedure. Observe safety precautions at all times and consider the information given in this lesson. - 2. Let one of your classmates act as the owner of the electric flat iron. - 3. Perform the procedures in accepting and pre-testing an appliance. - 4. Accomplish the Receiving and Repair Form and the Maintenance and Repair Form as you perform the activity. - 5. Provide information regarding the status and serviceability of the appliance. - 6. Fifty minutes will be allotted for this activity. - **Receiving and Repair** - **Customer's name:** - **Address:** - **Product/ Brand name:** - **Serial no:** - **Complain:** - **Electric Flat Iron** - **PART** - **AC Cord** - **S** - **CONDITION** - **GOOD** - **DEFECTТІVE** - **SYMPTOM:** - **POSSIBL** - **E DEFECT** - **PROCEDURE** - **CORRECTIVE MEASURE** - **Remarks:** - **Student's Signature** - **Teacher's Signature** - **Date Repaired:** - **Date Checked:** - **PERFORMANCE CHECK 3.1 PRE-TESTING AND DIAGNOSING/ TROUBLESHOOTING AN ELECTRIC FLAT IRON** - **Directions:** Rate yourself on how competent you have applied the skill in pre-testing and diagnosing electric flat iron using the criteria below by checking on the appropriate box (points 1 to 5, 5 being the highest). Compute for the rating by multiplying each item by its corresponding percentage, divide it by 5 then multiply by 100. Get the sum of your ratings. - **Criteria** - **Workmanship** - **Use of Tools** - **Use of Personal Protective Equipment** - **SPEED** - **House Keeping** - **%** - 50 - 30 - 10 - 5 - 5 - **Points** - **5 4 3 2 1** - **Rating** - **Criteria** - **Workmanship**` - **Use of Tools` - **Use of Personal Protective Equipment` - **SPEED` - **House Keeping` - **Description** - Followed the steps accordingly/ Less 1 point for every missed procedure. - Used tools/ materials in right task/ Less 1 point for every misused. - Used PPE during the whole activity/ Less 1 point for every forgotten instances - Finished within the time/ Less 1 point for every five minutes delay - The workplace is clean before, during and after the activity/ Less 1 point for every dirt observed. - **Student's Signature** - **Teacher's Signature** - **Date Repaired** - **Date Checked** - **LO4: REASSEMBLE AND TEST REPAIRED APPLIANCES** - Perform final test for reassembled units in conformity with manufacturer's specifications. - **INFORMATION SHEET 4.1 REASSEMBLING AND TESTING AN ELECTRIC FLAT IRON** - **Reassembling Procedure:** - 1. After replacing the defective part of the appliance, prepare the parts for reassembling. Make sure that there are no missing parts or component and as well as the screws. - 2. Review the operating and service manual if available. - 3. Fix all the disassembled parts in the housing/compartment, considering the fittings, lock etc. - 4. Wires should be in their proper places and loose parts should be tightened to avoid damaged due to misalignment. - 5. All sides of the housing should fit. See to it that Selector Switch is moving appropriately and the rest of the movable parts. - 6. Clean the unit before doing the testing procedure. - **Testing Procedure:** - 1. Set the ohmmeter to Rx1.Test the AC plug to determine the continuity of the power line to the heating element. Reading must be around 14 ohms. - 2. Energize the unit to check its functionality. Move the Selector Switch slowly. Within a minute or two, the unit should operate normally. If not, review the documentation and troubleshoot again. - **ACTIVITY 4.1 REASSEMBLING AND TESTING REPAIRED ELECTRIC FLAT IRON** - **Directions:** Provided with the resources, follow the procedures in reassembling and testing repaired electric flat iron presented in Information Sheet 4.1. You will be rated using the Performance Check 4.1. - **Resources:** - Service Manual of Electric Flat Iron - Repaired Electric Flat Iron - Tools and Equipment - Needed Pliers - Screwdrivers - VOM - Cleaning - materials PPE - **PERFORMANCE CHECK 4.1 REASSEMBLING AND TESTING REPAIRED ELECTRIC FLAT IRON** - **Directions:** Rate yourself on how competent you have applied the skill in pre-testing and diagnosing electric flat iron using the criteria below by checking on the appropriate box (points 1 to 5, 5 being the highest). Compute for the rating by multiplying each item by its corresponding percentage, divide it by 5 then multiply by 100. Get the sum of your ratings. - **Criter** - **ia** - **%** - 5 - **Point** - **S