How To Find The Right Equivalent Components In SMPS. Circuit .. against circuit faults and effectively isolates the circuit from the AC supply source. Smps troubleshooting and repair the easy way. The power supply fault could be an open start up resistor only or could be even more If you had measured all the components in the power supply section and could not find the defective. 27 Mar very often when i attempt to repair electronic devices either mine or from friends i find out the problem is with the power supply which these.

Author: Fenrikinos Nibar
Country: Angola
Language: English (Spanish)
Genre: Love
Published (Last): 1 March 2012
Pages: 324
PDF File Size: 5.91 Mb
ePub File Size: 15.83 Mb
ISBN: 191-8-11950-383-9
Downloads: 39110
Price: Free* [*Free Regsitration Required]
Uploader: Voodoogrel

In other words, the Switch Mode Power Supplies Repair Guide tells you what smps fault finding need to do, and faulg you exactly how, without leaving you to imagine what to do. How To Test Electronics Components.

Now things can get tricky. SMPS can fail in many different ways, the most common being no output power at all. Several ideas for fixing SMPS have been explained, not with the intent of being an exhaustive troubleshooting manual, but more as a collection of tricks smps fault finding you may find smpa.

You may smps fault finding just stumbled across the most important letter you ever read. Many repair technicians will not use back the power IC whenever they found problem like a shorted power FET in the power primary side. I’ve made it as easy as humanly possible for you by giving you a proven blueprint for success.

That’s why I’ve decided to pack all of my power suplies repair strategies into one explosive course. There smps fault finding also a resistor linked to the source pin of this ic called the current sense resistor which sometimes open or change value and this can cause the power supply not to start.


In this case, I start by checking the input fuse. I am an instructor that teach electronic repair subject finxing also I have written 3 e-books in the electronic repairing topics.

In order to understand how to solve s. If you still smps fault finding two reading then you can dinding that diode is shorted.

How to repair SMPS and check its functionality?

Powering it off-line with a small external DC power supply and checking for pulses on the transistor base or gate is a good idea. I’ve developed a bit of a reputation for explaining complex things in a way just about anybody can understand.

It’s easy smps fault finding order. This tool allows for a quick check of all electrolytic capacitors without removing them from the circuit. How to repair SMPS and check its functionality?

Smps fault finding like you can see where to go, but you don’t know how to get there.

More Questions Like This. A very useful tool in checking and diagnosing electrolytic capacitors is an ESR meter.

Troubleshooting switch mode power supplies

smps fault finding Also when using this method and find that the diode has two reading in-circuit and when lifted up you get one reading, it could also mean there is a short on that source line. First check the voltage across this main capacitor and if you get around vdc onvac outlet or vdc on vac outlet then it is assumed the supply is okay up to the main capacitor.

Instructions are in plain English. Put your red probe to the cold ground and the black probe to each of the outputs of secondary diodes.

You’ll be smps fault finding how little work and effort is actually involved for you to start repairing SMPS and have lots of fun in the process!


switch mode power supply repair

It’s not a fantasy, and it’s well within your reach. N o matter which country you’re in, PowerSupplyRepairGuide. For example, check if the controller IC still works. Than I check the capacitors see below.

You can observe it on the bottom smps fault finding side of faullt PCB as a larger spacing in the tracks. You’ll get instant access to the entire course even if it’s 3 am in the morning. Try adding a different answer. This happened due to the main board resistance and some undischarged voltage from the secondary output filter capacitor.

Electrolytic capacitors are very often the cause of SMPS faupt. The large SMD diode is the low voltage rectifier. It should smps fault finding only one reading and sometimes the pointer will kick up a little bit. How Much Does It Cost? Maybe even provide manually adjustable duty cycle switching.

And if you continue along that path, smps fault finding only going to get worse. Faulr is all possible when you have the knowledge in repairing power supplies. You can’t add content on Bayt. Irrelevant to Specialties or not an answer.

Secrets of Smps repair and troubleshooting the fast way

Remember, nothing will change until you take action. My Question is New.

If you repair Monitor smps, if one of the output voltage lines shows two readings, please do not think that the lines is having a problem. So grab your copy now while it’s still at this smps fault finding price.

It’s easier than you think. Let’s get right to the point. Always make sure all capacitor are completely discharged before touching the circuit.