Fantastic Electronic Repair Tools or Testing Equipment

Fantastic Electronic Repair Tools or Testing Equipment That Every Technicians and Engineers Have To Own It.

A must have high voltage probe if you repair computer monitor or tv

Using high voltage probe to repair computer monitor or tv is an advantage to you because you can see the actual voltage produced at the anode (high voltage). A too high or too low high voltage reading could mean that there are certain circuitry in the circuit is having problem. We can't guess how much is the high voltage by hearing. Our normal multimeter can't test the high voltage because it can check voltage up to 1000 volt ac/dc only! With the help of high voltage probe, it can also pinpoint you right to the defective circuit. Read the article to learn more about high voltage probe.

How to use dick smith esr meter to check ceramic disc capacitor

Every owner of dick smith esr meter knows that the meter are designed to check low ohms resistor and electrolytic capacitor. Somehow this special meter have the capabilities to check beyond electrolytic capacitor, it can be used to test ceramic disc capacitor or non-polarity capacitor. The good news is , it can check those capacitor on board! Click the link for more information.

Electronic Repair Tips And Articles

Everything you need to know about electronic repair tips:

How to make electronic repair shop into authorized service center

Have you ever think of upgrading your electronic repair shop into authorized service center? The amount of work that you will received are plenty and you will learn a lot of new technology, electronic circuit and designed. All repair information that you gathered as an authorized service center can be benefit to you in the future. You can expand to repair more variety of equipment and make lots of income. Take this article as a guide and be prepare to be a well established authorized servicing center.

The importance of electronic repair courses

Having a knowledge in just basic electronic repair is not enough because the competition is so great nowadays, you may need some additional training to improve your repair skill or some other courses that can helps you to diversify into another field.

Is electronic repair servicing line a dying trade?

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How To Repair Ethernet Broadband Router

How to use a regulated power supply to identify short circuit in ethernet broadband router

Electronic Repair Workshop

Electronic Repair Workshop

 

Electronic repair components

Before you begin to repair any electronic equipment, you need a conducive work area where you can perform your repairs. The requisites of a good workshop are as follows:

The workshop should have 3 pronged (grounded) electrical outlets, good lighting and well-ventilated. Your work area needs a very good lighting system. Some electronic equipment uses Surface Mount Devices (SMD) which is very small, thus making it difficult to identify the value or part number. Without good lightings, you will have trouble identifying its components.

It should be well-equipped with test instruments and tools, and should have sufficient storage space for spare parts and related accessories.  

 

 

 

 ESR METER

Floor material should be anti-static, non-sticky, easily cleaned and non-slippery. It should be kept clean of dust, dirt, webs, insects, etc.

The workshop should have fire extinguishers and a first-aid kit box.

The workbench should be equipped with a complete power strip with surge protectors, fluorescent lighting and a magnifying lamp. A magnifying lamp does not only provide light, but also makes it easier to read component markings.

The workbench also should have sufficient space for keeping test instrument, tools, soldering iron and the set under test.

There are many other accessories that makes electronic repairing easier, which includes jumper cables, power cords and chemicals just to name a few.

Good planning of a workshop will make people enjoy working there!!!

Introduction To Electronic Servicing

Introduction To Electronic Servicing

With countless new electronic products or equipment reaching the market, there is a large demand for electronic repair technicians and engineers. As a result, you may be interested in moving into the electronics repair field. The electronic servicing field is considered a prestigious job. If you are really good in your work, there is almost no competition and you can acquire skills that allow you to earn enough money. Servicing is an ideal combination of your intelligence, efficiency and easy mechanical work. By gaining more experiences the efficiency and skills automatically becomes instinctive.

Many electronic equipment servicing operations are simpler than you may think. You will be surprised to learn that most servicing problems have simple causes – worn cables, dirty connectors, a loose screw in the works, and so on. Almost any end-user can check for this kind of problem. However, there may be other problems caused by component failure. You may give up and say “I’m not an expert in electronics”. You may be surprised to learn that many “troubleshooting” jobs do not require much detailed knowledge of electronics. Even in a “professional” troubleshooting operation, the technician or engineer may not have a detailed knowledge of the circuitry. Electronic servicing is not mysterious or difficult; it only requires your patience and some basic knowledge in electronics.

 

If you are thinking of becoming an electronics repair technician or engineer, you need proper qualifications. Get at least a certificate in basic electronics or its equivalent through electronic courses. You can go far beyond this by continuing up to a diploma level. As you progress, you will discover your weakness. It’s then up to you to find out more by attending professional courses or reading up related books. Of course, the higher the level you desire, the better. Electronic equipment breaks down every second and we will need good technicians and engineers to ensure a good repairing job is done. So, if you are thinking of joining us – go for it!!!

Troubleshooting And Repairing Sylvania LD320SS8 LCD TV With Shutdown Problem

 

This is a common LCD TV that we see for repair. The failure symptom is almost always that the TV will turn on for just a moment, “digital television” is displayed in the lower right corner and then the TV shuts down and goes back into standby mode.

This type of failure is almost always caused by a power supply or inverter circuit failure in the majority of LCD TVs. Normally I would start by measuring output voltages from the power supply during the moment it is on to see if any are out of tolerance or missing especially the output to the inverter circuit, inspect the PCBs for solder connections with ring cracks and check the power supply secondary side filter capacitors for raised ESR and check the pico fuses and transformers on the in the inverter circuit etc.., but with this model I know that one of the HV transformers in the inverter circuit often develops an open secondary winding, typically it is  the HV transformer at location T1100. 

The first thing I do with this model is check all the secondary windings to see if any have opened by measuring there resistance, an open winding will have an infinite resistance or if you are using a DMM you will get an O.L. (Over Limit or Open Loop) reading. Each one of the HV transformers in this model TV has 2 secondary windings. 

 

While measuring the resistance I found that none of the secondary windings had opened, but what I did notice was that one of the secondary windings had a much lower resistance that then all the others I measured. All of the secondary windings had a resistance of between 522 and 527 ohms and the suspect secondary winding had a resistance of 495.4 ohms, about 30 ohms less than the rest. This was a very good indication that this secondary winding had shorted turns. This is what's great about testing the HV transformers in most LCD TVs, being able to compare the test results of one transformer against the others as typically only one of the HV transformers will go bad and it will be easily identified when tested and compared against the others. 

Upon closer inspection of the transformer with the shorted secondary winding the burned area of the secondary winding was noted as well, confirming without a doubt that the transformer was faulty and sure enough it was T1100, the transformer that we normally replace in this model but always for an open secondary winding but this time obviously the winding was shorted. Most likely what typically happens is the secondary coil shorts and then excess current is drawn as the resistance of the coil drops which in turn causes the coil to heat up and burn causing it to go open, but in this case the coil shorted and the TV shutdown before it had a chance to open. 

After the HV transformer was replaced with a new one, part number LTZ2PC0MS008(substitute for 3PC0XB001) the TV turned on and functioned properly once again.

The LTZ2PC0MS008 can be found at Electronica USA along with many other electronics components.