COMPETENCYBASED LEARNING MATERIALS ELECTRONIC PRODUCTS ASSEMBLY AND SERVICING CASIFMAS ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ HOW TO USE THIS COMPETENCY-BASED LEARNING MATERIAL Welcome to the Module Assemble Electronic Product. This module contains training materials and activities for you to complete. The unit of competency “Assemble Electronic Product” contained the knowledge, skills and attitudes required for Electronic Product Assembly and Servicing. It is one of the specialized modules at National Certificate Level II (NC II). You are required to do through a series of learning activities in order to complete each learning outcomes of the module. In each learning outcome there are Information Sheets. Do these activities on your own and answer the self - checks at the end of each information sheet. You also have to perform the Operation Sheet and afterwards, you have to evaluate your own performance using the performance criteria checklist. If you have questions, don’t hesitate to ask your trainer for assistance. Recognition of Prior Learning (RPL) You may already have some or most of the knowledge and skills covered in this learners guide because you have: Been working for some time Already completed training in this area If you can demonstrate to your trainer that you are competent in a particular outcome, you don’t have to do the same training again. Talk to your trainer about having them formally recognized. If you have a qualification or certificate of competence from previous training, show it to your trainer. If the skills you acquired are still current and relevant to the unit/s of competency they may become part of evidence you can present to RPL. If you are not sure about the currency of your skills discuss this with your trainer. After completing this module ask your trainer to assess your competency. Result of your assessment will be recorded in your competency profile. All the learning activities are designed for you to complete at your own pace. In this module you will find the activities for you to complete and relevant information sheets for each learning outcome may have more than one learning activity. This module is prepared to help you achieve the required competency in receiving and relaying information. This will be the source of information that will enable you to acquire the knowledge and skills in Assembling Electronic Products. CASIFMAS ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ Training Methodology I List of Competencies No . 1. 2. 3. CASIFMAS Unit of Competency Module Title Code Assemble Electronic Products Assembling Electronic Products ELC72433 5 Service consumer electronics products and systems Servicing consumer electronics products and systems Service industrial electronic modules, products and systems Servicing industrial electronic modules, products and systems ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ ELC724336 ELC724337 MODULE CONTENT UNIT OF COMPETENCY` : Assemble Electronic Product MODULE TITLE : Assembling Electronic Product MODULE DESCRIPTOR: This course is designed to enhance the knowledge, skills and attitudes of a trainee/student on core competencies such as; assemble electronic products, service consumer electronics products and systems, and service industrial electronic modules, products and systems. It includes basic competencies such as; participate in workplace communication, work in team environment, practice career professionalism and practice occupational health and safety procedures. NOMINAL DURATION: 60 hours SUMMARY OF LEARNING OUTCOMES: At the end of this module, you must be able to: 1 2 3 4 5 Prepare to Assemble Electronic Product Make PCB Lay-out/Module Mount and Solder Electronic Components Perform Electronic Product Assembly Test, Adjust and Inspect Assembled Product LEARNING OUTCOME 1 Prepare to Assemble Electronic Product CONTENTS: Occupational Health and Safety procedures Identification of Materials, tools and equipment Identification and classification of electronic components Testing electronic components ASSESSMENT CRITERIA: 1. Materials, tools and equipment are inspected for safe working condition operation in-line with manufacturer’s user guide. 2. Prepare to assemble electronic Product 3. Prepare PCB Lay-out 4. Prepare to mounting and soldering Electronic components 5. Perform electronic Product Assemble 6. Prepare the materials, tools, and Equipment to inspect assembled product CASIFMAS ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ 7. Test/inspect assembled product. CONDITIONS: The trainees will have access to: 1. Workshop station 2. Working tables, chairs 3. Training Materials ( CBLM) 4. Personal Protective Equipment 5. Power Supply Materials - Printed circuit board - Sandpaper, alligator clips - pencil ,paper, ruler & permanent marker - Electronic components (diode, capacitor & transistor) 6. Tools and test instruments - Soldering tools (Soldering iron, Soldering stand, Desoldering tool) - Driving tools (Flat screwdriver, Philips screwdriver) - Splicing tools ( Side cutter, Long nose pliers, Wire Stripper) - 12 V Mini drill - Auxiliary tool ( Utility knife, paint brush/ cleaning brush) - Multi tester (VOM) METHODOLOGIES Lecture Individualize Learning Demonstration ASSESSMENT METHODS: Written Test Demonstration Oral Questioning CASIFMAS ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ LEARNING EXPERIENCE LEARNING OUTCOME 1 Learning Activities Read Information Sheet 1.1-1 on Special Instructions Occupational Health and Safety procedures Answer the self-check to measure your knowledge on the topic. Read Information Sheet 1.1-2 on You are required to get all the answers correct. If not, read the Information Sheet again to answer all questions correctly. Identification of Materials, tools and equipment Answer the self-check to measure your knowledge on the topic. . Read Information Sheet 1.1-3 on Identification and classification of electronic components Answer the self-check to measure your knowledge on the topic. Read Information Sheet 1.1-4 on You are required to get all the answers correct. If not, read the Information Sheet again to answer all questions correctly. You are required to get all the answers correct. If not, read the Information Sheet again to answer all questions correctly. Testing electronic components Answer the self-check to measure your knowledge on the topic. Perform Operation Sheet 1.1-1 CASIFMAS ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII You are required to get all the answers correct. If not, read the Information Sheet again to answer all questions correctly. Your performance will be evaluated using Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ Operate a 12V Mini Drill Perform Task Sheet 1.1-1 the Performance Criteria Checklist 1.1-1 Prepare Assembly Workplace Perform Job Sheet 1.1-1 Your performance will be evaluated using the Performance Criteria Checklist 1.1-1 Your performance will be evaluated through the Performance Criteria Prepare to Assemble Electronic Products Checklist 1.1-1 Perform Operation Sheet 1.1-1 Your performance will be evaluated Operate a multi-tester to test electronic through the Performance Criteria Checklist 1.1-1 components. After completing all the activities of this LO, you are ready to proceed to the next LO on Prepare/Make PCB modules. INFORMATION SHEET NO. 1.1-1 OCCUPATIONAL HEALTH AND SAFETY PROCEDURES Learning Objectives: After reading this information sheet, you must be able to explain the occupational Health and Safety procedures. 1. Discuss the occupational health and safety requirements in the workplace 2. Implementing occupational health and safety practices 3. Familiarize the safety tips and practices. In every field of work, there are safety precautions and practices to be followed to prevent accidents. Sometimes before an accident occurs, a warning is given so the individual concerned can prepare for the undesirable eventualities. In areas where trainees are acquiring basic technical skills, safety begins the moment they enter the work area or even before reaching the work area. Identifying health hazards and occupational risk is indispensable. In workshop areas where trainees stay to acquire skills, there are certain points to consider. 1. Electrical hazards are fatal like electric shocks from open wire and Grounded electrical appliance. CASIFMAS ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ 2. Hazards can be caused by improper use and maintenance of electronic Hand tools: a. Cutting tools may inflict injuries and cut through the flesh or The skin of the human body. b. Driving tools and boring tools can break human flesh of fracture bones. c. Soldering tools can cause extreme heat and can burn the skin. OCCUPATIONAL HEALTH AND SAFETY REQUIREMENTS AT WORK For your protection, observe the following: 1. Follow all cautions, warnings and instructions. 2. All passage must be free from any obstruction that will hamper the movement of persons in the area. CASIFMAS ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ 3. All tools and equipment must be checked to be In an A1 condition. 4. The shop is a place of work so no one can engage in play while at work. 5. Keep all hand tools inside the tool cabinet, tool box or on the table and not inside your pocket as it might hurt you or hurt other people. 6. Keep the working area always clean and orderly. 7. Always use protective equipment like safety goggles if needed while performing a task or job. 8. Some test must be connected with power supply applied. Be extremely cautious when performing these tests. 9. Keep flammable materials and substances away from your working area by keeping them in a safe place intended for them. 10. Be physically and mentally fit when working with electrical or electronic circuits. CASIFMAS ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ CASIFMAS ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ PERSONAL PROTECTIVE EQUIPMENT It is the employer’s responsibility to provide personnel protective clothing and equipment. It includes work clothes and specially designed protective clothing intended for your protection. Wear the correct clothing and equipment to protect you from possible serious injury. Do not interfere with or misuse any item provided for health and safety. Personal Protective Equipment (PPE) is defined in the Occupational Safety and Health Administration (OSHA) as a tool used to protect workers from injury or illness caused by having contact with the dangers (hazards) in the workplace, whether they are chemical, biological, radiation, physical, electrical, mechanical and other. Exposures to hazards are reduced using PPE. The types of Personal Protective Equipment Personal Protective Equipment can be classified according to target organs potentially affected of the risk of danger. Identification of hazard and risk assessment of a job, process and activity must be done first before deciding which type of PPE to be used. Organ CASIFMAS Source of danger ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII PPE Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ 1 Eye 2 Ear 3 Head 4 Respiratory 5 Body 6 Hand and Arm 7 Foot splashes of liquid chemicals or metals, dust, catalyst powder, projectiles, gas, steam and radiation. safety spectacles, goggles, face shield, the sound with the noise level more than 85 dB. crushed by falling objects, hit by hard objects, rotating objects entangled hair dust, steam, gas, lack of oxygen (oxygen deficiency). extreme temperatures, bad weather, splashes of liquid chemicals or metals, a blast from a leaking pressure, penetration of sharp objects, dust contaminated extreme temperatures, sharp objects, crushed by heavy objects, electric shock, chemicals, skin infections. slippery floors, wet floors, sharp objects, falling objects, chemical splashes and liquid metals aberration. ear plug, ear muff, canal caps. helmets, bump caps. 1. Mask respirators, breathing apparatus boiler suits, chemical suit, vest, apron, full body suits, jackets. gloves, armlets, 4. Hand Gloves ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO mitts. safety shoes, safety boot leggings. 2. Apron 3. Goggles CASIFMAS welding shield Revision # Page __ of __ SELF CHECK NO. 1.1-1 Multiple Choice: Choose the correct answer of the following question. 1. Always assume that all the parts in the power supply are? a) b) c) d) Hot Warm Cold Temperate 2. The resistor value can be around ____ to _____ kilo ohms 10watts a) b) c) d) 22.2 to 4.7 2.2 to 4.7 2.2 to 4.8 22.2 to 4.8 True or False CASIFMAS ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ Direction: Read each statement carefully. Write T if the statement is correct and F if the Statement is false. Write your answer in your answer sheet. 1. Before you start to work on a power supply, always turn off the power and discharge the capacitor. 2. The capacitor has a range of about 150uf at 330uf at 400 working voltage. 3. Electrical shock a serious shock may stop your heart and if large electric current flows through your body, you will receives serious burns. 4. Use only Plastic screwdriver for shock protection. 5. Attempt repair work when you are tired or rushed 6. Don’t wear rubber bottom shoes. 7. Always turn on the equipment and unplug it before you begin to work ANSWER KEY 1.1-1 1. A 2. B True or False 1. True 2. True 3. True 4. True 5. False 6. False 7. False CASIFMAS ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ INFORMATION SHEET NO. 1.1-2 MATERIALS, TOOLS, AND EQUIPMENT Learning Objectives; After reading this sheet, you must be able to: 1. Classify the different electronic materials, tools and equipment. 2. Familiarize the function of different electronic materials, tools and equipment 3. Enumerate the different electronic materials, tools and equipment. 4. Select tools and equipment in accordance with the task to be perform. 5. Perform operating procedures of Drill Press machine. CASIFMAS ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ In every electronic work, it is a must to prepare the necessary tools, materials and equipment needed as well as the information. The following are list of tools, materials and equipment needed to assemble electronic products: SOLDERING TOOLS 1. Soldering Iron – a device used for joining metals permanently by applying heat to melt the solder. 2. Desoldering tool – used in removing soldered wires and components on the PCB for troubleshooting and repair purposes. 3. Soldering stand – a tool where the soldering iron is placed during usage. 4. Soldering lead – the “filler metal” used in soldering DRIVING TOOLS 1. Flathead Screwdriver – used to drive or fasten negative slotted screw. 2. Philip screwdriver – used to drive or fasten positive slotted screw. SPLICING TOOLS CASIFMAS ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ 1. Side Cutting pliers – used for cutting wires and excess terminal leads. 2. Long nose pliers – used for bending, stretching and holding terminal leads of components and wires. 3. Wire Stripper – it cuts the insulation of the wire without cutting the wire. BORING TOOL 12V Mini drill – used to bore/drill hole in the printed circuit board. AUXILIARY TOOLS 1. Utility Knife – used for cutting various trades and crafts for a variety of purposes. 2. Cleaning brush – used for cleaning the (Paint brush) circuit. MATERIALS 1. Printed circuit board- mechanically supports and electrically connects electronic components or electrical components using conductive tracks, pads and other features etched from one or more sheet layers of copper laminated onto and/or between sheet layers of a nonconductive substrate. Components are generally soldered onto the PCB to both electrically connect and mechanically fasten them to it. CASIFMAS ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ 2. Breadboard A breadboard is a flat plastic base with a matrix of holes in which wires and components are connected. A breadboard is used to build prototype versions of sophisticated electronic circuits by plugging wires, resistors, capacitors and other devices. This is helpful in practicing as the connection is not permanent so that the wires can be plugged in and out as per the needs. 3. Pencil- for sketch 4. Masking tape- 5. Ruler- 6. Permanent marker- 7. Chassis/Compartment- CASIFMAS ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ EQUIPMENT CASIFMAS ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ Oscilloscope Oscilloscope (Image Courtesy: B&K Precision) Although oscilloscopes may not be needed by hobbyists and beginners, these come handy while learning electronics and troubleshooting circuits. An oscilloscope displays time-varying signals like voltage waveform patterns on a screen which help in visualizing the circuit functions. While the basic models cost around $300, the sophisticated ones can be bought for up to several thousands of dollars. Signal Generator Signal Generator (Image Courtesy: Tektronix) It’s a device that generates electronic signals and waveforms which are either repetitive or non-repetitive, depending upon the requirement and field of applications. CASIFMAS ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ There are different categories of signal generators carrying different levels of capabilities, dimensions, designs, and parameters. The applications include designing, repairing of electronic devices, and troubleshooting. Every versatile signal can create an unlimited number of signals to meet the debug challenges. One can also vary the output of the signal generator by setting the amplitude and frequency of the output signal while a simulation is in the process. Soldering Station Soldering Iron Stand (Image Courtesy: SparkFun) The soldering tool stand is used to keep the soldering iron in a place away from flammable materials. The station also comes with a sponge to clean the tip of the soldering iron. CASIFMAS ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ SELF-CHECK 1.1-1 Directions: Select the correct answer from the choices listed below each item. Write the letter of your in your answer sheet. 1. Used for cutting various trades and crafts for a variety of purposes. a. b. c. d. Utility knife Cutter Tweezer Stripper 2. Used for bending, stretching and holding terminal leads of components and wires. a. b. c. d. Long nose pliers Combination pliers Side cutter pliers Wire stripper 3. A device used for joining metals permanently by applying heat to melt the solder. a. b. c. d. Soldering iron Soldering pump Soldering lead Soldering stand 4. Used in removing soldered wires and components on the PCB for troubleshooting and repair purposes. a. b. c. d. CASIFMAS Soldering pump Soldering paste Soldering wick Both a and c ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ Answer key No. 1.1-1 1. a 2. a 3. a 4. d CASIFMAS ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ INFORMATION SHEET 1.1-2 Electronic Components Learning Objectives: After reading this Information Sheets, You must be able to: Categorize the different electronic components Familiarize the importance of electronic components Prepare and check the required electronic components used to assemble electronic products CASIFMAS ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ 1. WIRE WOUND RESISTOR A wire wound resistor is also called a POWER RESISTOR. This type of resistor can have a resistance as low as 0.1 ohms (one-tenth of an ohm) or as high as about 10k. The purpose of a resistor like this is to stop or reduce "ripple." Ripple is the noise or hum in an amplifier when the sound is turned up. There are many reasons why you need to reduce the level of hum and this resistor will remove ripple as large as 2.5v when 3.6 amps is flowing, provided you have filter electrolytics on both side of the resistor to assist in removing the ripple 2. A "BURNT" RESISTOR - normally and technically called a "burnt-out" resistor. The resistance of a "burnt" resistor can sometimes be determined by scraping away the outer coating - if the resistor has a spiral of resistance-material. You may be able to find a spot where the spiral has been damaged. Note the spirals of conductive carbon. The number of spirals has nothing to with the resistance. It is the amount of carbon particles in the "track" that determines the resistance. It is also the thickness and width of the track that determines the resistance. And then it is the overall size of the resistor that determines the wattage. And then the size of the leads, the closeness to the PCB and the size of the lands that eventually determines how hot the resistor will get. 3. 100mA FUSES Fuses below about 100mA are very hard to make and very unreliable. Many circuits take a high current when turned to charge the electrolytic and a 100mA (or 50mA or 63mA fuse) will bow and stretch and change shape, every time the equipment is turned ON. Eventually it will break, due to it heating-up and stretching. To produce a reliable fuse below 100mA, some manufacturers have placed a resistor inside the fuse and connected it to a spring. One end of the resistor is soldered to a wire with low-temperature metal and when the resistor gets hot, the metal softens and CASIFMAS ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ the spring pulls the resistor away from the wire. 4. CAPACITORS Capacitors are one of the most difficult things to test. That's because they don't give a reading on a multimeter and their value can range from 1p to 100,000u. A faulty capacitor may be "open" when measured with a multimeter, and a good capacitor will also be "open." You need a piece of test equipment called a CAPACITANCE METER to measure the value of a capacitor. a. ELECTROLYTIC and TANTALUM CAPACITORS Electrolytics and Tantalums are the same for testing purposes but their performance is slightly different in some circuits. A tantalum is smaller for the same rating as an electrolytic and has a better ability at delivering a current. They are available up to about 1,000u, at about 50v but their cost is much higher than an electrolytic. b. Ceramic capacitors 104 (2) 5. VOLTAGE REGULATORS. A Voltage Regulator takes a high input voltage and delivers a fixed output voltage. Providing the input voltage is 4v above the output voltage, the regulator will deliver a fixed output voltage with almost no ripple. 6. TRANSFORMERS All transformers and coils are tested the same way. This includes chokes, coils, inductors, yokes, power transformers, EHT transformers (flyback CASIFMAS ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ transformers), switch mode transformers, isolation transformers, IF transformers, baluns, and any device that has turns of wire around a former. All these devices can go faulty. 7. OPTO ISOLATORS and OPTO COUPLERS Opto Isolators and Opto Couplers are the same thing. A common opto-coupler is 4N35. It is used to allow two circuits to exchange signals yet remain electrically isolated. The signal is applied to the LED, which shines on a silicon NPN photo-transistor in the IC. 8. DIGITAL TRANSISTORS There is no such thing as a DIGITAL TRANSISTOR or an AUDIO TRANSISTOR. All transistors are just "TRANSISTORS" and the surrounding components as well as the type of signal, make the transistor operate in DIGITAL MODE or ANALOGUE MODE. 9. TRIACs A triac is a bidirectional, three-terminal dual, back-to-back thyristor (SCR) switch. This device will conduct current in both directions when a small current is constantly applied to the Gate. If the gate is given a small, brief, current during any instant of a cycle, it will remain triggered during the completion of the cycle until the current though the Main Terminals drops to zero. CASIFMAS ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ 10. MICA WASHERS AND INSULATORS Plastic insulating sheets (washers) between a transistor and heatsink are most often made from mica but some are plastic and these get damaged over a period of time, turn dark and become cracked. The plastic eventually becomes carbonized and conducts current and can affect the operation of the appliance. You can see the difference between a mica sheet (washer) and plastic by looking where it extends from under the transistor. Replace all plastic insulators as they eventually fail. 11. Diodes (IN4001) diode is a device that allows current to flow one direction and usully made with semiconductor materials. It has two terminals, anode and cathode terminals. These are mostly used in converting circuits like AC to DC circuits. These are different types like PIN diodes, Zener diode, LEDS, photo diodes. 12. LED A Light Emitting Diode – or LED for short – is a component that can give light. We use LEDs to give a visual feedback from our circuit. For example to show that the circuit has power. But, you can also used them to make cool light-show circuits. You see these components everywhere: In your laptop, on your mobile phone, on your camera, in your car +++ And you can find many different types of LEDs. A very common circuit to build as a beginner is the blinking light circuit. 13. ZENER DIODE CASIFMAS ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ in 14. VOLTAGE REGULATOR 15. Inductor it’s just a coil of wire – and you can make one yourself by making some loops out of a wire. Sometimes they’re wound around a metal core of some sort. They are often used in filters. I rarely use one actually, but when I wrote that in my article “What is an inductor?” a friend of mine reacted. See his response at the end of that article. 16. Integrated Circuit An Integrated Circuit (IC) consists of many basic electronic components. It’s just an electronic circuit that has been shrunk to fit inside a chip. CASIFMAS ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ Operation Sheet 1.1-1 Title: Operate a 12V Mini Drill Performance Objective: Given a 12V Mini Drill with drill bits, you are to operate and check the tool within fifteen (15) minutes with consideration to occupational health and safety policies and procedures. Supplies/Materials: Printed Circuit Board (PCB). PPE Equipment’s /Tools: 12V Mini drill with drill bits Procedure: 1. Select the proper drill bit for the material you are drilling. Metal and wood usually can use the same type of drill bit, but masonry bits have a very special design. 2. Put on eye protection. Hold the drill with both hands perpendicular to the hole you want to drill. 3. Push the drill into the material using gentle pressure 4. If the drill is going into wood, you may need to pull the drill out periodically as the drill bit will probably clog. By pulling the drill bit partially out of the work while the bit is turning, it will self-clean. 5. If the drill bit does clog (usually from pressing too hard and too fast), then pull the bit out and clean the clog out with a hard material such as a screwdriver or nail. CASIFMAS ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ 6. Drilling through metal can be tricky. The bit may bind as it cuts through the other side, if this happen release trigger pressure immediately. Pull the bit back and slowly complete the cut. Here it is handy to have a reverse feature especially if the bit gets stuck when it binds. 7. Once the drill penetrates the material you're done. Method of Assessment: Demonstration Interview Performance Criteria Checklist 1.1-1 Operate a 12V Mini Drill Name of Trainee: _______________________ Date: __________ CRITERIA YES Prepare assembly workplace in accordance with OH&S policies and procedures Follow establish risk control measures for work preparation Prepare and prepare the required materials, tools and equipment in accordance with established procedures Identify, prepare and obtain parts and components needed to complete the work according to requirements NO Observations/Comments: _____________________________________________________________ Name of Trainer and Signature: ______________________ Date: __________________ CASIFMAS ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ Task Sheet 1.1-1 Title: Prepare Assembly Workplace Performance Objective: Given the resources needed, you must be able to prepare assembly workplace within fifteen (15) minutes in accordance with occupational health and safety policies and procedures Supplies/Materials: Power Supply Materials: Printed circuit board, Sandpaper, alligator clips, pencil, paper, ruler & permanent marker, Electronic components (diode, capacitor & transistor) Equipments/Tools: Tools and test instruments: Soldering tools (Soldering iron, Soldering stand, Desoldering tool), Driving tools (Flat screwdriver, Philips screwdriver), Splicing tools ( Side cutter, Long nose pliers, Wire Stripper), 12 V Mini drill, Auxiliary tool ( Utility knife, paint brush/ cleaning brush), Multi tester (VOM), chairs, working tables, electronic components, PPE Procedures: 1. Arrange electronic components based on safety considerations 2. Arrange materials together in the cabinet as to facilitate the measures regarding occupational health and safety policies and procedures 3. Clean and dust the tables and chairs CASIFMAS ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ 4. Arrange working tables, chairs and other related facilities in line with the standard occupational health and safety requirements Method of Assessment: Demonstration Interview Performance Criteria Checklist 1.1-1 Prepare Assembly Workplace Name of Trainee: _______________________ Date: __________ CRITERIA YES Prepare assembly workplace in accordance with OH&S policies and procedures Follow establish risk control measures for work preparation Prepare and prepare the required materials, tools and equipment in accordance with established procedures Identify, prepare and obtain parts and components needed to complete the work according to requirements NO Observations/Comments: _____________________________________________________________ _____ CASIFMAS ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ Name of Trainer and Signature: ______________________ Date: __________________ Job Sheet 1.1-1 Title: Prepare to Assemble Electronic Products Performance Objective: Given the resources needed, you must be able to prepare to assemble electronic products workplace within one (1) hour in accordance with occupational health and safety policies and procedures Supplies/Materials: Power Supply Materials: Printed circuit board, Sandpaper, alligator clips, pencil, paper, ruler & permanent marker, Electronic components (diode, capacitor & transistor) Equipments/Tools: Tools and test instruments: Soldering tools (Soldering iron, Soldering stand, Desoldering tool), Driving tools (Flat screwdriver, Philips screwdriver), Splicing tools ( Side cutter, Long nose pliers, Wire Stripper), 12 V Mini drill, Auxiliary tool ( Utility knife, paint brush/ cleaning brush), Multi tester (VOM), chairs, working tables, electronic components, PPE Procedures: 1. Arrange electronic components based on safety considerations 2. Arrange materials together in the cabinet as to facilitate the measures regarding occupational health and safety policies and procedures 3. Clean and dust the tables and chairs CASIFMAS ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ 4. Arrange working tables, chairs and other related facilities in line with the standard occupational health and safety requirements 5. Prepare an occupational health and safety practices report according to the result of the operations made. Method of Assessment: Demonstration Interview Performance Criteria Checklist 1.1-1 Prepare to Assemble Electronic Products Name of Trainee: _______________________ Date: __________ CRITERIA YES Prepare assembly workplace in accordance with OH&S policies and procedures Follow establish risk control measures for work preparation Obtain and clarify work instructions based on job order or client requirements CASIFMAS ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ NO Consult responsible persons for effective and proper work coordination Prepare and prepare the required materials, tools and equipment in accordance with established procedures Identify, prepare and obtain parts and components needed to complete the work according to requirements Observations/Comments: _____________________________________________________________ Name of Trainer and Signature: ______________________ Date: __________________ Performance Criteria Checklist 1.1-1 Operate a Multi-tester Name of Trainee: _______________________ Date: __________ CRITERIA YES Prepare assembly workplace in accordance with OH&S policies and procedures Follow establish risk control measures for work preparation Prepare and prepare the required materials, tools and equipment in accordance with established procedures CASIFMAS ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ NO Identify, prepare and obtain parts and components needed to complete the work according to requirements Observations/Comments: _____________________________________________________________ _____ Name of Trainer and Signature: ______________________ Date: __________________ Operation Sheet 1.1-1 Title: Operate a 12V Mini Drill Performance Objective: Given a 12V Mini Drill with drill bits, you are to operate and check the tool within fifteen (15) minutes with consideration to occupational health and safety policies and procedures. Supplies/Materials: Printed Circuit Board (PCB). PPE Equipment’s /Tools: 12V Mini drill with drill bits CASIFMAS ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ Procedure: 1. Locate the dial of your multimeter. 2. Find the selector switch, or knob 3. Locate the openings in the case where you'll insert the test leads. 4. Locate the test leads. 5. Find the battery and fuse compartment. 6. Find the Zero Adjustment knob. 7. Set the multimeter to Ohms or Resistance. 8. Connect the test leads. 9. Hold the probes at the end of the test leads together. 10. Measure the resistance of something like a light bulb that you know is good. 11. Try different ranges. 12. test resistance between hands 13. Make sure your reading is accurate. 14. Set the meter for the highest range provided for AC Volts. 15. Insert your test probes. 16. Locate the voltage scales. 17. Test a common electrical outlet. 18. Remove the probes. 19. Reinsert the probes as previously. 20. Try not to hold both 21. Make sure you've measured the voltage first. Method of Assessment: Demonstration Interview Performance Criteria Checklist 1.1-1 Operate a 12V Mini Drill Name of Trainee: _______________________ Date: __________ CRITERIA YES Prepare assembly workplace in accordance with OH&S policies and procedures Follow establish risk control measures for work preparation CASIFMAS ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ NO Prepare and prepare the required materials, tools and equipment in accordance with established procedures Identify, prepare and obtain parts and components needed to complete the work according to requirements Observations/Comments: _____________________________________________________________ Name of Trainer and Signature: ______________________ Date: __________________ References: Technology and Livelihood Education ELECTRONICS IV Http://www.Electronics.com https://www.google.com/search? q=mounting+of+electronic+components&oq=mounting+of+electronic+components&aqs=chrom e..69i57j0l5.10023j0j8&sourceid=chrome&ie=UTF-8 CASIFMAS ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __ CASIFMAS ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NCII Document No. Date Developed: Date Revised: Issued by: NTTA Developed by: CORE 1 MICHAEL C. STO DOMINGO Revision # Page __ of __