Have you ever before discover power issue where as soon as you turn on the power supply as well as the fuse strike? You have actually examined all the elements in the power (main) as well as additional area and also all the elements appears to be okay! Where is the mistake? A fuse blown are normally brought on by a shorted bridge rectifier, faulty posistor, power transistor or FET, shorted key winding of button setting power transformer, shorted second diode and also etc. Yet in this short article I’m mosted likely to reveal you an additional trick of digital troubleshooting ideas.
I obtained annoyed about where is the source of power trouble. Every single time when i turn on the power supply the fuse impact instantly (the fuse ended up being dark shade and also this suggest that there is a significant brief circuit in the power supply). I have actually examined all the elements in the power supply as well as can not discover the offender! What i do is i desoldered all the presumed components one at a time and also changed with a recognized great part. I at some point located the source of the power supply issue. Presume exactly what? It was the primary filter capacitor (220 microfarad 400 volt). After changing the filter cap the power supply functioned completely great. I start my investigator job to discover why this radial capacitor could triggered the fuse to blow although i currently validated it ALRIGHT with my meters.
The meters that i made use of to examine the filter cap were analog meter, electronic capacitance meter as well as esr meter. In this short article i will certainly not describe concerning ways to inspect capacitor or screening capacitor and also just how radial capacitor job. I thought the majority of you recognize how you can examine capacitors as well as usually utilizing this kind of meters. Determined with analog it revealed capacitor billing and also discharge, with electronic capacitor tester it revealed around 220 microfarad as well as with esr meter it revealed reduced esr analysis!
This showed that the poor capacitor malfunction when under complete operating voltage. After that, just how do i verify that this filter capacitor is malfunctioning? By utilizing an analog insulation tester. When i link the malfunctioning cap to the meter as well as press the go button-it revealed a really reduced resistance as well as this is the verified of brief circuit in between home plate when voltage used! There is absolutely nothing to do with poor electrolyte. An excellent radial capacitor will certainly simply revealed a cost as well as discharge in the insulation meter much like you are examining a capacitor utilizing analog multimeter. On the market there is fairly a variety of arrays that you could acquire. It has the variety of 50v, 100v, 250v, 500v, 1000v as well as 5000v! If you intend to examine a radial capacitor of 100 microfarad 160v after that you need to choose 100v. If you choose 250v, it will certainly blow your capacitor that is under examination.
If you have the SENCORE EXAMINATION TOOLS such as the sencore lc meter LC102 OR LC103, these meters have the abilities of inspecting any kind of kind of capacitors with 4 examinations:
– screening for capacitor worths
– looking for leak
– comparable collection resistance (ESR) as well as
– Dielectric absorption
It could inspect light weight aluminum electrolytic capacitor, radial capacitor, ceramic, high voltage capacitor as well as etc.
Conclusion-Different capacitor producer generated various kind of high quality of a capacitor. Possibly the negative capacitor that I came across are from the most affordable quality one. A capacitor failing when under tons is really unusual. Utilizing radial capacitor meter alone could address a lot of the electrolytic capacitor issue.
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