Siksi ainakin nuo tantalit vaihtaisin kaikki.

-M-

1. Pullistunut konkka on suurella varmuudella ylikuumentunut niin, elektrolyyttineste on kiehunut.

2. Pullistumaton konkka voi olla kuivunut niin hitaasti, ettei paine ole päässyt nousemaan kannun sisällä. Isoissa elkoissa konkan kapseli saattaa olla niin löysä, että se jo hölskyy sisällä.

3. Pullistumaton konkka voi myös olla täysin ehjä.

Mittaaminen on ainoa varma tapa todeta kunto. Yleismittarilla näkee vain kapasitanssin, mikä sekin on jo hyvä indikaatti; jos kapasitanssi on selvästi pudonnut niin saattaa olla ikääntynyt, mutta esim. 5…10% poikkeamasta ei voi varmuudella sanoa, onko kyse ikääntymisestä vai valmistustoleranssista.

Paras keino kotioloissa on käyttää komponenttianalysaattoria, millä pystyy mittaamaan ESR:n sekä häviökertoimen (DF).

Replacing capacitors is no substitute for repair. It is not a panacea or cure all. Reasons to recap are discussed, as well as horror stories of recaps gone bad.

Replacing Electrolytic Capacitors
https://www.youtube.com/watch?v=iPCAYOz80Xw

This video illustrates a method of “recapping”–removing and replacing electrolytic capacitors on a circuit board.

Failing capacitors can cause a computer or electronic device to malfunction.

I picked up some cheap Chinese capacitors on http://www.aliexpress.com and decided to test their quality

Electrolytic capacitor replacement (recapping) is one of the most common repairs on today’s electronics. It’s also among the easiest electronic repairs most DIY’ers will have no problem successfully taking on.

All you need is a soldering iron, a little soldering & desoldering skill and of course the correct value replacement capacitor/s.

Failed electrolytic caps are so common place, you can literally save hundreds of dollars in replacement electronic device costs, while keeping them out of the landfill &/or electronic recycling facility.

I’ll show you how to visually spot a bad capacitor and in most cases, a visual inspection is all that’s needed to identify a bad electrolytic cap. I’ll also go over the values you need to know for your replacement caps, observing electrolytic capacitor polarity, and of course the actual capacitor removal and replacement process.

For those DIY’ers that have more testing equipment, I’ll also show my simple capacitor testing methods when they show no visible sign’s of damage. You don’t need this stuff of course to replace a bad cap, it’s just a little extra info for those that want to give it a go.

Video Time Chapters:
0:00 Howdy Folks
1:42 Identifying bad electrolytic caps
3:20 Removing capacitors
4:36 Replacing capacitors
6:59 Confirming repair
8:48 Electrolytic cap testing methods

Replacing SMD Caps the easy way.
https://www.youtube.com/watch?v=D2wQKKO1W6k

This video illustrates a method of “recapping”–removing and replacing electrolytic capacitors on a circuit board.

Failing capacitors can cause a computer or electronic device to malfunction.

Capacitor Replacement Tutorial
https://www.youtube.com/watch?v=YCSNWi3UHf4

Capacitance, voltage ratings and polarity are explained. You can replace faulty caps on your circuit board and bring your electronics back to life!