Have you ever before come across power issue where when you activate the power supply and the fuse impact? You have actually checked all the components in the power (key) and second section and all the elements appears to be okay! Where is the fault? A fuse blown are generally triggered by a shorted bridge rectifier, malfunctioning posistor, power transistor or FET, shorted key winding of button mode power transformer, shorted secondary diode as well as etc. Yet in this post I’m gone to reveal you one more trick of digital troubleshooting tips.
I got distressed about where is the cause of power trouble. Every time when i activate the power supply the fuse impact immediately (the fuse became dark color as well as this show that there is a significant brief circuit in the power supply). I have actually checked all the components in the power supply as well as can not discover the offender! What i do is i desoldered all the suspected parts individually as well as replaced with a recognized good part. I ultimately discovered the root cause of the power supply problem. Presume exactly what? It was the primary filter capacitor (220 microfarad 400 volt). After changing the filter cap the power supply worked completely great. I begin my investigative job to figure out why this capacitor can triggered the fuse to blow even though i currently validated it ALRIGHT with my meters.
The meters that i made use of to check the filter cap were analog meter, electronic capacitance meter and esr meter. In this article i will not describe concerning ways to inspect capacitor or testing capacitor and just how radial capacitor job. I thought most of you recognize ways to inspect capacitors and also typically using this type of meters. Measured with analog it showed capacitor charging as well as discharge, with digital capacitor tester it revealed around 220 microfarad and with esr meter it revealed reduced esr analysis!
This verified that the bad capacitor failure when under complete operating voltage. After that, exactly how do i verify that this filter capacitor is faulty? Using an analog insulation tester. When i link the damaged cap to the meter and press the go button-it showed a very low resistance as well as this is the confirmed of short circuit in between home plate when voltage used! There is absolutely nothing to do with negative electrolyte. An excellent radial capacitor will simply revealed a fee and also discharge in the insulation meter similar to you are checking a capacitor utilizing analog multimeter. In the marketplace there is quite a number of arrays that you could get. It has the series of 50v, 100v, 250v, 500v, 1000v and even 5000v! If you want to check a capacitor of 100 microfarad 160v after that you have to pick 100v. If you pick 250v, it will certainly blow your capacitor that is under examination.
If you have the SENCORE TEST EQUIPMENT such as the sencore lc meter LC102 OR LC103, these meters have the capabilities of examining any type of sort of capacitors with 4 tests:
– screening for radial capacitor values
– checking for leak
– equal collection resistance (ESR) as well as
– Dielectric absorption
It could check aluminum electrolytic capacitor, movie capacitor, ceramic, high voltage capacitor as well as etc.
Conclusion-Different capacitor manufacturer like Jinpei Electronics created different sort of top quality of a radial capacitor. Possibly the poor capacitor that I experienced are from the most affordable grade one. A capacitor failure when under lots is very unusual. Utilizing ESR capacitor meter alone could resolve most of the electrolytic capacitor trouble.