MediaTech Boombox BT MT3145: How to Charge Device Bypassing Micro USB Port?

Question

The USB socket after soldering again fell off, so this is the number 1 defect of this device. Now the question is how to solve the problem of charging the device bypassing the micro USB port? Soldering it without a specialized soldering iron is not an option, too close paths and you can easily...

qs300 · Answer

The first and last path is + and -, the rest is for data transfer (at least on phones etc.). Check with the meter in your smartphone charger which pin is + and which one - solder the socket anyway.

esk2 · Answer

Where the micro usb has dropped out there is no chance to solder properly. I plugged into the bat1 socket and the room is working, only the loading diode is not lit, so we will see.
Generally, somehow this product is a failure

jdubowski · Answer

Isn't that where the battery is connected? If so, it'll blow you or fireworks. But next to it enough soldermask to scratch and solder wires.

esk2 · Answer

so exactly where the battery is connected, it looks like it has been recharged .. but it turns out that I use it for a long time ..

jdubowski wrote:
But next to it enough soldermask to scratch and solder wires.

and more specifically? because I'm not so good at electronics? you can point this place more precisely or edit my picture

rimot · Answer

First of all, clean thoroughly (get rid of excess tin) in the mounting location of the socket - it looks like there is a short circuit between pins 4 and 5. Here is the pinout description: I would plug in the diode D1 (+) and mass.

jdubowski · Answer

Then don't you, because with lithium batteries such games end badly. You may lose stitches. I marked in red (+) and blue (-) points where you can solder with a 5V power supply: Check with an ohmmeter.

esk2 · Answer

thanks to 'jdubowski' I did according to your advice how it works so far, the charging diode glows slightly during charging, we will see after a few cycles.

I have to buy the right usb-usb cable because I plan to convert the charging socket into a full usb socket, I will show you the photo when I'm done.

inpes · Answer

If you have a damaged charging socket, charge via USB socket. I did it and it works .

esk2 · Answer

I am currently testing this solution because in this configuration the charging diode does not light up in red, and additionally the charging in the USB causes the device to start. from what I remember while charging, the battery icon on the display was blinking in the broken socket. see

szafran1983 · Answer

I recommend such a thing only that I gave there 5x18650 so the power bank charges faster than from this original socket. I recommend this solution for someone who doesn't like or can't be under the charger every now and then. After unscrewing the battery container, there is a lot of space inside.

comandos21 · Answer

Saffron can you write what components you used? Some photo from the inside would be helpful

ivanharry · Answer

I have a similar problem, only one that I can make a plus and minus on the final and initial pin because the soldering place is broken where would you give a plus and where minus I send photos

jdubowski · Answer

You have in post #7 painted.

ivanharry · Answer

Yes, but there is a slightly different layout and a different description, so I don't know which diode to give

jdubowski · Answer

Another version of MediaTech Boombox BT MT3145? Because it looks like something else to me... Solder in the marked places, you have to scratch off the soldermask:

ivanharry · Answer

It is not the MT3150 MEDIATECH Added after 7 [minutes]: I scratched it as you said, I'll try to solder it and see if it works It'll be all right ?

jdubowski · Answer

It will be, unless you make a short circuit (check with an ohmmeter) and you have no other damage.

ivanharry · Answer

Is there any other option to solder it because I scratched it but I don't want to solder it and the plus can't be done because the path is too thin is there another option on some diodes or these battery inputs?

ivanharry · Answer

I can do it as stated

jdubowski · Answer

Either the wrong equipment and materials, or a lack of skill. Learn to solder on some electronic scrap. Alternatively, take it to someone who can. And is it exactly the same path? Because the picture doesn't show it...