Basic circuit board troubleshooting pdf

For instance at work i have a circuit board im working on and im stuck on it. Disconnect the power supply from the circuit board only one wire need be disconnected, and then use an ohmmeter to measure continuity. Identify charging, st arting, ignition, and accessory circuit components, their functions, and maintenance procedures. It is a board that has lines and pads that connect various points together. We shall discuss in this chapter the partitioning of the circuitry, the problem of interconnecting traces, parasitic components, grounding schemes, and. The process of troubleshooting comprises the following steps. Be sure that all connections are securely fastened. Be sure that parts with positive or negative markings are positioned as shown in the drawings. Question 1 determine if the light bulb will deenergize for each of the following breaks in the circuit. Introduction to basic electronics learning about basic electronics and creating your own projects is a lot easier than you may think.

Introduction to pneumatics and pneumatic circuit problems for. How to troubleshoot a circuit board with a multimeter pdf types of multimeter. Heat passes through the heat exchanger, warming the air circulating through the ducts. Fusetp1 tp3 tp4 tp5 tp6 tp8 tp7 dc voltage output tp9 tp10 tp2 the technician begins making voltage measurements between some of the test points tp on the circuit board. Look for improper voltages, improper waveforms, obvious component overheating. Before getting into details of printed circuit board, there are some basics you need to know about circuits. Electronic repair is a skill and once you had mastered it, no one can snatch your knowledge away. A schematic diagram is the road map of the circuit. Printed circuit boards, or pcbs, are a mass of insulators and copper traces. For example, in figure b1, the control wiring from the startstop. It must be understood that the mechanical circuits would operate much.

When i measure the bad board, the output is around 45vdc. The thermostat reaches the set temperature and opens. A virtual troubleshooting exercise such as this one is a good way to start students thinking in the right ways to becoming effective troubleshooters. Some basic electronic repair troubleshooting tips duration. More extensive troubleshooting is now required within the identified faulty unit. Electrical troubleshooting 3 measuring voltage drop observe the circuit above. Failure of this pump will result in the loss of a generator currently producing half of the stations power output. Learn some of the basic things that anyone can look for when troubleshooting broken.

With a 12 volt power source connected to the load, the meter should read a voltage drop equal to the source voltage or 12 volts. We have multiple custom design boards that we used to help teach our students to understand electronics and how to troubleshoot electronics. This twoday course covers the history and theory of operation of pitotstatic instruments and transponders, as well as system setup, handson testing, and the. Though sometimes it was quite time consuming, we still enjoy it. Basic wiring diagram have students produce a basic wiring diagram. Seymour msee it is the intention of this course to teach the fundamental operation of basic electronic components by comparison to drawings of equivalent mechanical parts. Your professionals will learn to diagnose and repair a variety of faults in a simulated electrical circuit consisting of wiring, lights, relays, switches and pushbuttons. It may be that you have to move a high wattage item like a space heater or kitchen appliance to another circuit. Dxm digital heat pump controller test mode test mode allows the service personnel to check the operation of the control in a timely manner. Circuit drawings and wiring diagrams electrician 8 youth explore trades skills activity 2. An example of a dry or gray soller joint the solder failed to flow, and instead beaded to form globules around the wire. Basic electronic components model eck10 instruction manual by arthur f. Basic electronic troubleshooting techniques as an industrial electrician, youll encounter many complex electrical circuits and drives that will break down as they age. How to troubleshoot a circuit board with a multimeter pdf.

This can eliminate the breakers tripping when multiple items are turned on at the same time. Troubleshooting electrical circuits can be helpful when you are getting overloads on one circuit. The diagram should show incoming power feeding a receptacle. By momentarily shorting the test terminals on the board, the dxm control enters a 20 minute test mode period in which all time delays are sped up 15 times. Analogue signature analysis to test the unpowered printed circuit boards pcbs. In this tutorial, were going to give you a brief overview of common electronic components and explain what their functions are. Diagnosing of defective printed circuit boards pcb. The control circuit board opens the gas valve and generates a spark at the dsi igniter.

The basics which can be applied to troubleshooting are given below. From the given circuit, find the voltage across ab, cb, and db. We shall discuss in this chapter the partitioning of the circuitry, the problem of interconnecting traces, parasitic components, grounding schemes, and decoupling. Learn about circuit boards, troubleshooting, and repair. A pcb allows signals and power to be routed between physical devices. Jan 01, 2015 in this video, i take you through the basic process of troubleshooting electronic devices that do not work. Part c describes the methods to determine reference designators and the procedures for wire tracing in a circuit. Electronic repair training circuit board repair and rework. Actually was looking for a book that just disects schematics. What instruments should be used to inspect an electronic circuit for problems. The design of the printed circuit board can be as important as the circuit design to the overall performance of the final system. Explain how to properly clean an electronic circuit board. Holes go all the way through the board from one side to the other. Most basic pcb troubleshooting can be done with just a few tools.

Furthermore, if you are replacing any wire in any circuit the same rule applies. Troubleshooting electrical circuits tec is our foundational electrical troubleshooting simulation. Only experienced professional technicians should repair products powered by electricity. Troubleshooting basic lcd tv repair secrets revealed lcd monitor repair guide vol. The burner ignites, building heat in the combustion chamber. Electronic repair troubleshooting tips and secrets for. It covers good basic electronic fault finding principles. We will begin to search for the answer in the internet, books and electronic repair magazine, forums and from our fellow repair friends. Thermal imaging system for circuit board troubleshooting introduction many circuit board defects cannot be identified easily using conventional inspection and failure analysis methods such as in circuit test, functional test, optical inspection, and xray inspection. In the picture above, there are traces that electrically connect the various connectors and components to each other. Learn more on how to troubleshoot failed printed circuit boards from global electronic services. Chances are, you wont be an expert in repairing these devices, but you can take some practical steps to solve problems and help get your systems operational again in a timely. In this video, i take you through the basic process of troubleshooting electronic devices that do not work. It does not contain warnings to advise nontechnical individuals of possible dangers in attempting to service a product.

Understanding and using electronic diagrams 5 in this simple power supply, all the voltage regulation functions are done by u 1, which is a 7812 positive voltage regulator. Pdp tv training manual this information is published for experienced repair technicians only and is not intended for use by the public. It can be very intimidating when a component on a board gets hot, exhibits unexpected behavior, does nothing at all, or even explodes. The total voltage of the circuit will be the sum of the voltages across each of the resistors in the circuit. Describe the basic procedures used to test a diode in an electronic power supply. Identify charging, st arting, ignition, and accessorycircuit components, their functions, and maintenance procedures. Printed circuit board components are attached to a printed circuit board. Exciter circuit 8 c d n l1 internal wiring schematic.

We will add more posts soon on many topics such as how to build a solar generator, and this post will help build the basics on which those posts will expand. Basic circuit troubleshooting basic electricity pdf version. Basic schematic interpretation subcourse number od1725 edition b march 1996. Fortunately, electrical circuit troubleshooting is an activity that works well for small groups of students to engage in as well as individual students. Introduction to pneumatics and pneumatic circuit problems. Before the advent of the pcb circuits were constructed through a laborious process of pointtopoint wiring. Troubleshooting electrical circuits wiring electrical. Basic circuit troubleshooting worksheet basic electricity. This led to frequent failures at wire junctions and short circuits when wire insulation began to age and crack. Localizing the trouble to the circuit isolating the circuits within the faulty unit. Introduction to basic electronics, electronic components. More often than not, a circuit is not going to work perfectly on the first try, especially as a beginner. Simplify and rebuild closely related to the strategy of dividing a system into sections, this is actually a design and fabrication technique useful for new circuits, machines, or systems. John prisciandaro and dan butchko, birmingham public schools, birmingham, michigan sponsored by.

For starters, a few basic facts about electricity should be covered. Troubleshooting electrical circuits simutech multimedia. Many textbooks and courses attempt to teach troubleshooting either too soon in. Nov 29, 2010 good troubleshooting skills are vital to the electronics hobbyist.

Ensure when adding the wire for a new circuit in an existing circuit that the wire type and size is correct. This is an integrated circuit that has regulation and protection circuits built into one package. Specific troubleshooting techniques troubleshooting. The wiring diagram will show the circuit students will wire in wiring devices and wiring a wall section. For minor problems, troubleshooting requires a little knowledge about the circuit and its components working because it involves checking the connections only. Remember that your ability to solder effectively will determine directly how well the prototype or product functions during its lifespan. Part a identifies basic symbols used in circuit schematics. It must be sized according to the national electric code tables for wire sizing. Practical troubleshooting of electronic circuits for engineers and. Continue testing sections of the circuit or just test points within the circuit to see if you measure the expected voltages and currents.

This threeday seminar focuses on handson troubleshooting down to the component level without a schematic. Specific troubleshooting techniques all about circuits. In a series circuit the current i in amperes is the same everywhere in the circuit. You have a circuit board with the circuit shown below.

Good troubleshooting skills are vital to the electronics hobbyist. Well, there is a method that we use to troubleshoot electronic circuits without. Examine the following illustration of a simple batteryswitchlamp circuit. Study unit understanding and using electronic diagrams. After applying some of the general troubleshooting tips to narrow the scope of a problems. Fluid power educational foundation, 3333 north mayfair rd. A technician is troubleshooting a power supply circuit with no dc output voltage. Capitulo 2 automotive electrical circuits and wiring. This subcourse presents basic schematic interpretation in three parts.

Basic electrical troubleshooting a boiler feed pump being powered by two 3500 hp inducti on motors appears to be developing a problem. Operators are complaining that a large compressor on several occasions has failed to start. These circuits are easy to use, and are found in many applications. While simple soldering and component changes may be suitable for less. Understanding basic electricity can be invaluable in both safety, as well as when troubleshooting and repairing an electrical circuit. Have you ever had a printed circuit board go bad on you and you needed to repair it but. Y board circuit explanation x board circuit explanation data address board explanation. Why is an intermittent electronic circuit malfunction difficult to detect. Basic computer skills georgia institute of technology. This is the large circuit board in the middle of the case which houses the main components of the computer. Mar 20, 2016 understanding basic electricity can be invaluable in both safety, as well as when troubleshooting and repairing an electrical circuit.

Circuit boards are more complicated to repair today than even a few years ago. Printed circuit board is the most common name but may also be called printed wiring boards or printed wiring cards. Automotive electrical circuits and wiring 3 101 automotive electrical circuits and wiring introduction learning objective. The test leads are connected in parallel across the circuit load. Network is an interconnection of elements or devices, circuit is a network providing one or more closed paths.

The basic soldering guide photo gallery s oldering is a delicate manual skill which only comes with practice. Most circuit problems are due to incorrect assembly, always double check that your circuit exactly matches the drawing for it. How to troubleshoot electronics down to the component level. Electronics troubleshooting finding whats wrong youtube. Suppose you were instructed to check the continuity of the switch sw1 mounted on the printed circuit board.