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Thread: Cleaning/fixing micro usb sockets

  1. #1
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    Cleaning/fixing micro usb sockets

    As per title, I'm looking for advice or tips on how to fix micro USB ports. I have a few devices that just on't take a reliable input.
    Changed leads to new leads
    wiggled a lot
    fretted

    any clues?


  2. #2
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    Quote Originally Posted by MrGruffy View Post
    As per title, I'm looking for advice or tips on how to fix micro USB ports. I have a few devices that just on't take a reliable input.
    Changed leads to new leads
    wiggled a lot
    fretted

    any clues?
    Cleaning is best done with IPA (isopropyl alcohol). IPA is available in a spray can from Jaycar as "Electronics Cleaner". The reasons it's better than metho is that it's less likely to damage plastics and dries faster and cleaner. Unfortunately while the spray cans are very convenient, they are also very expensive. Bunnings have started selling IPA in the standard 1 litre bottles - it's in the paint section along with the other chemicals like thinners and paint stripper. It's about the same price as the cans but at least you get 1 litre instead of 240gm or whatever is in the little spray cans.

    Say you get a ton of juice in your mod and it starts malfunctioning, or you drop it in the ditch and accidentally stand on it (whatever the mod is RS) but you can't or don't want to dismantle the mod. You take the battery out and submerge it in IPA. Make sure the IPA runs through the mod and change it if you have to. Then put the mod in a warm place to dry out for a day and you are good go.

    Metho is 5% water so not quite so good around electronics, can damage some plastics (the soft type used on displays for eg.) and the denaturing agent is a bit kacky - they've also started putting purple dye in some brands... Very pretty, but useless to me. If the IPA is too expensive then use metho, just allow more drying time before powering the electronics up.

    Jaycar sell little nylon brushes like a big toothbrush, or you could actually use a toothbrush if you want too. I would put a little IPA in the USB port and give it a gentle clean with the brush. Blow it out with some compressed air or blot it with a little wad of tissue.

    If it still doesn't charge after this then it's most likely a damaged connector or a broken solder joint or track. Inspect the connector and see if the four little tracks are still there and in the right place. If they are not, the port needs to be replaced (if you can get the right type)

    If the insides of the port wobble or move then the port may have broken away from the circuit board. Same as for replacing it, this requires re-soldering the port onto the circuit board and fixing the track if it has been broken. A lot of the cheap mods only have two of the four pins connected to the circuit board (the +ive and -ive), and this is one of the things that make for an easily damaged port. Even then the constant pushing, pulling and wiggling on the port is what usually causes it to break off the board.

    No special knowledge is necessary to replace the port, but the solder joints are damn tiny and hard to see. I'm pretty good with a soldering iron but I hate doing micro USB ports.

    If it's none of the above and the port is not functioning at all then it might be the regulator chip in the charge circuit that is damaged. It's probably a common chip that is used but you are starting to get more into the enthusiast level electronics repair. It becomes questionable whether it's worth repairing at that stage - anything less than $50 replacement cost, probably not.

    Also, (and I should have said this first), if it's an internal battery, consider if the battery hasn't died. A dud battery will often charge for a short while, then stop. It behaves like a < 200mAh battery, and even that self discharges in an hour or so.
    Last edited by fabricator4; 07-05-17 at 10:21 PM.
    Chris: Tobacco free since 17:00 15th March 2013.

  3. #3
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    Thanks fab, some good ideas I haven't tried in your reply.
    ipa under pressure is good. It'll be time to go to town sometime this week or next, I need to have leeches applied every 3-4 months, and I'm due to be patronised by Mr Specialist by videoconference soon, so jaycar it is, have new kittens so another laser dot required anyway as dog refuses to let me use hers for the interlopers.
    I have 5 different devices with this problem, and as I suspect the root cause to be my grimy farmy pocket crud pressurised IPA may well do the trick.


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    Good luck with Dr Death and his bloodsuckers, MrG. Hope all goes well.

    tapatalk for photo upload 👍
    tapatalk for general usage 👎
    MrGruffy likes this.
    Rabid non-smoker since 1630hrs 25/11/2016.

    Pebble fondler, living life beyond the vertical.

  5. #5
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    Quote Originally Posted by rockmoose View Post
    Good luck with Dr Death and his bloodsuckers, MrG. Hope all goes well.

    tapatalk for photo upload 
    tapatalk for general usage 
    Is no trouble spilling the blood, only the amount of pain varies. Nearly every outside endeavour conspires to help with iron reduction, bit o chainsawing 1l, fencing 500ml per 100m, clutch slave cylinder replacement 100ml, axe work for a pallet of stacked wood, 50-5000ml, large pile of cut and moved gorse 100ml from suprisingly painful places.


  6. #6
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    Quote Originally Posted by MrGruffy View Post
    Is no trouble spilling the blood, only the amount of pain varies. Nearly every outside endeavour conspires to help with iron reduction, bit o chainsawing 1l, fencing 500ml per 100m, clutch slave cylinder replacement 100ml, axe work for a pallet of stacked wood, 50-5000ml, large pile of cut and moved gorse 100ml from suprisingly painful places.
    You must have too much blood if it's leaking all over the place like that. Leeches are no good they don't get enough. A good 'ole blood letting is what you need.

    Get the little brush, or a toothbrush as well. Sometimes the gunk needs a bit of extra persuasion.


    Chris: Tobacco free since 17:00 15th March 2013.

  7. #7
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    I have to spill 500ml or so every few months to keep iron levels normal range. Amusingly leeches were my first thought when Dr couldn'tbearsed was 6 months slow on the ok. Apparently leeches would work but also inject wayyyy to much toxin.
    also brushes.


  8. #8
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    Perhaps MrsG needs to be introduced to the delights of vampirism.

    tapatalk for photo upload 👍
    tapatalk for general usage 👎
    Rabid non-smoker since 1630hrs 25/11/2016.

    Pebble fondler, living life beyond the vertical.

 

 

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