Comments on: Warning For Bad Blu-Ray Discs

By: Robert Calk Jr.

Robert Calk Jr. — Sun, 03 Nov 2019 00:25:23 +0000

Mobile phones can never replace a CB radio because there is no way of knowing all the phone numbers of strangers driving down the road or listening on the channel the radio is tuned to. People are always happy to see their devices repaired for free! Lol.

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By: Albert van Bemmelen

Albert van Bemmelen — Fri, 01 Nov 2019 20:47:21 +0000

Quite an interesting story Robert! Sorry to hear you had to quit your job because of physical problems. Maybe the vibrations in your truck had caused the resistor to break, or maybe the resistor which only was 1/4 Watt already was damaged when it was placed in the pcb of your CB radio? We never know.
Many years ago I was asked to repair someones CB radio. Sadly mobile phones have made CB radio less important now. It was nothing as interesting as your snapping resistor but it turned out that there was no signal in any of the amplifying transistor stages. In one of the stages an e-cap shorted to ground blocking the amplified signals from going through.
It took me some time before I found the culprit because I first concentrated on all the semiconductors. Which were not causing the problem. The owner was very glad I fixed it but probably also because I did it for free.

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By: Robert Calk Jr.

Robert Calk Jr. — Mon, 28 Oct 2019 18:19:37 +0000

Hi Albert. I am glad that your drive is still working. My CB radio stopped working right before I became disabled and had to quit truck driving. I remembered it later after I started learning electronics repair for my hobby and took it apart to find out what happened to it.
I found a 1/4 watt resistor mounted vertically on a board that had the long lead snapped in half about halfway down the lead. I removed the resistor and the broken lead and examined the broken areas of the leads under my microscope. This was before I started writing articles.
The breaks looked like the lead had been bent back and forth many, many times until it snapped apart. I talked to some people on forums, and I might have asked Mr. Yong about it too, and everyone said that they had never heard of electricity doing something like that. But that is what the evidence showed: that the electricity going through that resistor caused some kind of resonance that caused the lead to vibrate and then snap apart.
I replaced the resistor with a 1/2 watt, and it worked just fine.

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By: Albert van Bemmelen

Albert van Bemmelen — Sun, 27 Oct 2019 12:39:21 +0000

I'm sure Robert that you are familiar with the powerful effect that resonance can have on in same frequency trembling things. That is what must have happened to my previous not brittle at all Bluray disc. Afterwards the material resembles that of broken glass. The disc probably started to break and then it accellerated because of the centrifugal force and hit the plastic case when it no longer was held in position by the turntablemotor. My drive luckily still works as if nothing had happened. But I now no longer will use those inkjet printable Bluray discs if I don't have to.

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By: Robert Calk Jr.

Robert Calk Jr. — Sat, 26 Oct 2019 21:50:17 +0000

Thanks Albert! I have never heard of that problem before.

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By: Devon Wilson

Devon Wilson — Fri, 25 Oct 2019 20:14:13 +0000

Thanks a whole lot for sharing your invaluable experience.

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By: Albert van Bemmelen

Albert van Bemmelen — Thu, 24 Oct 2019 19:34:42 +0000

In reply to Maurizio C..

Sorry Maurizio, I never had any problems with DVDs or CDs before. Only a lot of problems with certain BluRay discs that came from spindles from well known manufacturer's that became useless in the first seconds of burning data to them. According to the seller Opus supplies a problem that relates to the version of firmware the BluRay Burner had in recognizing the right disc parameters.
But as mentioned in my article upgrading my burners to newest available versions still didn't help when for instance Primeon Discs were used either! In the end I had to throw at least 25 BluRay discs in the Bin! They already were finalized right in the first seconds after the faulty burning process ended. Why I prefer Verbatim BluRay 25 and 50GB Discs. But they are as mentioned able to explode!

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By: Albert van Bemmelen

Albert van Bemmelen — Thu, 24 Oct 2019 19:17:16 +0000

In reply to Parasuraman S.

Thanks Parasuraman, but as I already explained to Roger to take into account that I wasn't speaking about DVD's but about the special inkjet coated Verbatim 25 GB BluRay discs that are heavier and not identical material wise to plain DVDs!
Like you I also never had any problem with burning or reading those lighter thinner DVDs or CDs! (Plus 5000+ of them). THEY NEVER EXPLODED like the Bluray I mentioned in my article!

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By: Albert van Bemmelen

Albert van Bemmelen — Thu, 24 Oct 2019 19:08:24 +0000

In reply to beh.

Indeed Beh! I really believe this is a problem that has something to do with the resonance frequency of the material the Bluray disc was made of.
And most people may think it was just a bad disc. But I'm very sure that all these inkjet printable Bluray discs are likely to explode in our burners at higher reading drive speeds because of the same design flaw in the production process!

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By: Mihai

Mihai — Thu, 24 Oct 2019 17:33:26 +0000

In reply to Maurizio C..

Hello Maurizio !

I had this kind of problem with Asus dvd writer, don't recognize the discs. I cleaned the lens, but same problem. When i looked closely, i found warn last pin from the lift mechanism. Conclusion: the mechanism who lift up the lens and the motor is the culprit.

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