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    May ordinary USB flash port be different???

    Hi everyone
    I had to change my car's recorder USB part because it became disconnected sometime (no sound), amazingly after I changed it,it didn't work showing the massage "USB overload" so I soldered the old one again but never understand it USB port is all about 4 pins,they might be a little different in sizes and shapes but there is not any complicated fact. who can tell me what the point is???

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    Re: May ordinary USB flash port be different???

    Hi,

    Honestly I don't understand a bit what you are talking about.

    What about posting
    Partnames, vendors, photos....

    Klaus
    Please don´t contact me via PM, because there is no time to respond to them. No friend requests. Thank you.



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  3. #3
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    Re: May ordinary USB flash port be different???

    Quote Originally Posted by Alex2.54 View Post
    I had to change my car's recorder USB part
    ...
    I soldered the old one again
    So did this fix the port?

    Did you match each wire color correctly? The four wires need to be arranged in the correct order.

    Since you caused an 'overload' message, it suggests you got wires mixed up. Or, you accidentally put a blob of solder across two contacts that short circuited.



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    Re: May ordinary USB flash port be different???

    Quote Originally Posted by KlausST View Post
    Hi,

    Honestly I don't understand a bit what you are talking about.

    What about posting
    Partnames, vendors, photos....

    Klaus
    Click image for larger version. 

Name:	USB_2_and_3.jpg 
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Size:	438.7 KB 
ID:	154113
    Consider this image,I'm supposed to change the USB port, any kind of part should work because the structure is simple.



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    Re: May ordinary USB flash port be different???

    Since I replaced the old one,the problem isn't solved. Actually there aren't any wires,it must be soldered directly on the board.I carefully checked in order not to have short circuit but as you recognize the massage "overload" your theory could have been happened.I didn't managed to find the exact similar USB part vendor in the market but they must be the same.Is it possible to have a inside pin swapping?



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    Re: May ordinary USB flash port be different???

    Did the port become damaged by a device which extracts or forces a lot of current through it?

    There is a sequence called enumeration, which starts by allowing a device to draw 130 mA (but no more). The device can negotiate with the USB protocol, to request greater Ampere draw. The total amount was raised in USB-3. It creates convenience for consumers, to charge batteries and whatnot. However we tend to get the idea it's robust. Maybe it's not so robust.

    How do you use the USB ports in regard to audio? You reported a problem with the recorder, 'no sound'.
    Your photograph shows two audio jacks (mic in & headphones out). Do these work okay? The pink jack has the microphone icon below it. That jack is audio in, used for recording sound. Does that go to a sound card? Do the USB ports each have a sound card? If a card is damaged then it won't help if you change USB receptacles.


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    Re: May ordinary USB flash port be different???

    They all work well. Time to time player showed the massage ""no Flash memory" and other time the sound wasn't smooth.I happened to move flash memory gently and again it was detected by player so the USB port must have been problematic and I guessed pins inside port are loosened but not outside pins connected to pads because they are strong and I supposed the interrupting of sound regarded port.I think the arrangement of port pins might be different because another day I exactly made a MCU programmer on a breadboard based on a schematic ,it didn't work when I reversed the USB port by chance it started working.kind of weird.



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    Re: May ordinary USB flash port be different???

    Yes, that sounds like an odd arrangement on the circuit board if the connector has to change the order of the wires.

    To make progress in fixing the problem, you need to know the correct sequence of the four wires.

    You need to check continuity from each contact to its corresponding trace on the board. Flex the connector a little to test for hairline breaks.

    Your instruments must not apply too high voltage that might damage (or change operating characteristics) of components on the board.



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