Comments on: Several Bad Capacitors Found In SMPS

By: J. P. Purohit

J. P. Purohit — Tue, 19 Jan 2021 09:15:18 +0000

Nice to visit your site Mr. Parsuraman ji,
You article is ver useful to all who repairs such smps and other electronic gadgets, Thanks.

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By: Parasuraman S

Parasuraman S — Wed, 16 Jan 2019 09:08:32 +0000

In reply to John Shadbolt.

Thanks! I am aware of it. ESR also is being considered.

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By: John Shadbolt

John Shadbolt — Thu, 10 Jan 2019 22:48:43 +0000

Great job, glad you fixed it! Please note for future reference that 1mF=1000uF, so some caps may have been OK (at least in the short term).
Best wishes!

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By: Justice

Justice — Mon, 07 Jan 2019 12:09:51 +0000

My concern is what caused so many caps (14) to become faulty. is it perhaps the surge current(s) ? Thank you for the wonderful job.

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By: Parasuraman S

Parasuraman S — Mon, 07 Jan 2019 05:05:27 +0000

In reply to Bufford Moore.

Very valuable input on ChongX Caps.Thanks!

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By: Bufford Moore

Bufford Moore — Sun, 06 Jan 2019 16:14:47 +0000

I'm impressed that power supplies that have to (in theory) meet very high regulatory requirements for hospital use are so often built with very low quality components. In particular, I noted the ChongX capacitor that I have found to be so unreliable that when I work on devices, I replace any I find without respect to how they test. Some might consider this wasteful, but I had a number of repairs come back after one of these failed even though they appeared and tested OK at the time of the original, unrelated repair. Since I have started doing this, none of the repairs have come back to me.

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By: Henrique J. G. Ulbrich

Henrique J. G. Ulbrich — Sun, 06 Jan 2019 16:06:52 +0000

Very good work, and apparently quickly done. Greetings and thanks for sharing. China is wishing to dominate the world commerce but makes immature mistakes concerning minimum levels of quality of certain products. El caps are a significant example.

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By: Roop Gobind

Roop Gobind — Sun, 06 Jan 2019 15:20:30 +0000

Always a pleasure to read your posts. You are so professional in all that you do.
Keep up the good work. God bless

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By: Robert Calk Jr.

Robert Calk Jr. — Sun, 06 Jan 2019 08:45:04 +0000

Good job, Parasuraman.

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By: Randy

Randy — Sat, 05 Jan 2019 16:27:07 +0000

The same thing over and over, these cheap Chinese 'lytics are garbage and are responsible for failure after failure in electronic circuits. I NEVER use Chinese caps, only those made in Japan by reputable companies like Nichicon, Chemicon, Panasonic, and others. Just think, if the manufacturers used good 'lytic caps, we would be out of work, and things would last for 20+ years, just like in the olden days!

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