Repair！
As an electronics enthusiast, you must be interested in repairing appliances!
Burt how to repair?
Electronic components play an important part in electrical appliances. When our appliances are faulty, electronic component troubleshooting is a key element in the confirmation of appliance faults. Therefore, mastering component testing techniques is a key step in repairing electrical appliance failures.
In the following, let's learn about electronic component troubleshooting together!
Five methods of Testing components
1.Quality testing.
Usually use a multimeter and other simple test instruments into the quality of component testing, divided into in-circuit testing and off detection of two methods.
2. Fault repair.
A part of the components of certain faults can be repaired to restore normal function.
3. Adjustment technology.
Some components or mechanical parts can be restored to normal operation through the necessary adjustments, mainly mechanical parts can be adjusted through the relevant projects to restore normal function.
4. Matching principle.
Components must be replaced after damage, the replacement of the most ideal method is to directly replace, but in many cases because there is no original device, it is necessary to complete through the selection.
GOSON as your one-stop partner, we provide you with a full range of electronic components selection services and other technical support , to ensure that you can more quickly and conveniently for the replacement of electronic components.
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5. Replacement operation method.
Replacement of components is quite convenient, some are very difficult, for example, pin many four-row integrated circuits to replace it is very inconvenient.
Component testing techniques
Electronic component detection technology usually refers to the use of multimeters to check the quality of its, about electronic component detection technology mainly explains the following points:
1. The quality inspection of components is sometimes very accurate and thorough, but due to the limited measurement function of the multimeter, there is a very rough inspection of electronic components. Different components or measure different characteristics of the same component, the measurement will be different.
2. Using a multimeter to detect electronic components is mainly to measure the resistance between the two pins, through the measurement of the resistance value of the component quality judgement.
3. Component quality testing is divided into two cases: one is in the road test, that is, components mounted on the circuit board for direct measurement, this testing method is more convenient, do not have to remove the components on the circuit board, the measurement results are sometimes inaccurate, susceptible to the influence of the other components on the circuit board: the second is to disengage the circuit board after the measurement, the measurement results are relatively accurate.
multimeter
Component repair techniques
Component damage is the ideal situation is to replace the new parts, but in the following cases can be used to repair methods to restore the normal function of the component.
1. Some components are quite convenient, and the use of good results after repair, for example, the volume potentiometer rotating noise of this fault, through the simple use of pure alcohol to clean the potentiometer can be restored to the normal use of the function.
2. Some expensive components, or the market is difficult to match the parts, through the repair to restore their functions.
3. For mechanical parts, there are many faults can be repaired to restore its function, such as the card holder movement.
Component adjustment technology
About component adjustment technology mainly explains the following points
1. Component failure in the circuit faults occupy the main component, a part of the fault belongs to the improper adjustment of the device due to the adjustment of the problem can be solved through the adjustment.
2. Components that can be adjusted are mainly nominal value adjustable components, such as variable resistors, fine-tuning inductors, fine-tuning capacitors, and mechanical parts.
Principles of component selection
When replacing components, it is preferred to use components of the same type and specification. Component selection principle explains the following points:
1. Can not be achieved with the same model, the same specifications when the same selection method, different components, components for different occasions the selection principle is different.
2. Components of the total selection principle is to meet the main requirements of the circuit. For example, for the rectifier diode to meet the rectifier current and voltage two requirements, for the filter capacitor to meet the two requirements of voltage and capacity.
Points to note when replacing components
Components need to pay attention to the following points in the replacement process.
1. Most components are not "delicate", disassembly and matching process do not "wild" operation can be, but there are some components on the disassembly and assembly have special requirements, some also need special equipment.
2. Light-emitting diodes are afraid of hot, COMS devices are afraid of leakage, in the replacement of the corresponding precautions to be taken.
3. The disassembly and assembly process is very easy to damage the copper foil lines on the circuit board, to prevent copper lines from prolonged heat is an important link.
circuit board
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