Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

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Old December 1st 15, 09:46 PM posted to sci.electronics.repair
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Default Advice sought on why 6.8A USB charger melted USB cable today

Ian Field wrote, on Tue, 01 Dec 2015 18:32:51 +0000:

Probably worth figuring out what the problem is before one wrecks the nice
shiny pad someone got for Christmas - or burns down their Christmas
tree


I tested it with another cable but same charger and iPad overnight.
It didn't get hot.

So, I think it's the cable.


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Old December 2nd 15, 12:56 PM posted to sci.electronics.repair
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Default Advice sought on why 6.8A USB charger melted USB cable today

On Tuesday, December 1, 2015 at 3:49:11 PM UTC-5, Danny D. wrote:
Ian Field wrote, on Tue, 01 Dec 2015 18:32:51 +0000:

Probably worth figuring out what the problem is before one wrecks the nice
shiny pad someone got for Christmas - or burns down their Christmas
tree


I tested it with another cable but same charger and iPad overnight.
It didn't get hot.

So, I think it's the cable.


Possibly, even likely, that "it's the cable". But the lesson to be leaned is that if one in six is bad, that is a pretty wretched record. And whether at 5V or 50V, 5 amps is a considerable amount of current that *will* melt fine wire if shorted. So, poor quality control is a real concern. Are the remaining five ticking bombs, or are you *sure* it is just this one cable?

Put another way, you get what you pay for.

Put yet another way, do not rely on your equipment to protect itself from a bad peripheral.

I could purchase a Rolex watch when we were in China for US$5. It said so right on the watch!!

Peter Wieck
Melrose Park, PA
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Old December 2nd 15, 04:24 PM posted to sci.electronics.repair
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Default Advice sought on why 6.8A USB charger melted USB cable today

On Wednesday, December 2, 2015 at 3:56:09 AM UTC-8, wrote:
I could purchase a Rolex watch when we were in China for US$5.
It said so right on the watch!!

Peter Wieck
Melrose Park, PA

The amazing thing is that it does a much better job of keeping time than a real Rolex, with a typical error of about 1-2 seconds/month.


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