Blackview User Forum

 
blackview_admin
Posts: 4659
Joined: Mon Aug 17, 2015 3:30 am
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Re: [REMINDER] Charging board may cause mic and speaker problems

Sun Mar 11, 2018 8:35 am

kavedel wrote:
Neville wrote:
zemecha wrote:
I replaced charging board. Phone now works perfectly.


Hi Neville. mine is also giving me a huge headache with a faulty mic. Can you help me by sending a photo or ref of that (new) charging board?

i'm from Portugal and it will be lenty of expensive to sent it to china.. (and time consuming)
Thanks


There is a Russian teardown video of charge board replacement here https://www.youtube.com/watch?v=_gqXcHqiPQA

Mic and speaker both get powered via chargeboard.

However, I DO now have a customer phone with distorted speaker that was NOT fixed by chargeboard replacement. Only option is to replace speaker. You have to dig it out, existing speaker will break, and clean out the sealant completely, then paste new sealant, insert new speaker, wait till it dries and reassemble. If you are not confident about doing that you will need to purchase a new back cover unit, which includes speaker and mic.

You can if you are careful do it yourself, but it involves stripping the entire phone down and reassembling it in new case. A wiser suggestion would be buy the back cover (USD30) and pay a professional phone repair store to do the work...an hour's labour.

Well, it took me 3 complete hours but I managed to replace the speaker. Now it works fine. As expected the problem with it was fine metal powder of grinding which reached to the speaker. Admin, can you please report that "problem" to the right department so you can design a phone completely covered by these kind of "accidents" :lol: . It would be a must among us people working in metal industry and for me a replacement phone after the BV8000 Pro I have now.


Yeah, metal grinding dust is a known issue!
 
Craig
Posts: 1
Joined: Wed Mar 14, 2018 3:19 am

Re: [USEFUL] A faulty charging board may cause mic and speaker problems

Wed Mar 14, 2018 3:35 am

I've had my BV 8000 Pro for about 5 months and about a month ago my speaker volume is very very low won't turn up. And I work in a machine shop. could this be from fine metal? Or is there a way to fix? So aggravated about this. Thanks.
 
blackview_admin
Posts: 4659
Joined: Mon Aug 17, 2015 3:30 am
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Re: [USEFUL] A faulty charging board may cause mic and speaker problems

Wed Mar 14, 2018 10:10 am

Craig wrote:
I've had my BV 8000 Pro for about 5 months and about a month ago my speaker volume is very very low won't turn up. And I work in a machine shop. could this be from fine metal? Or is there a way to fix? So aggravated about this. Thanks.


Yeah, metal dust could be the culprit.
The only solution will be replacing the speaker.
 
kavedel
Posts: 80
Joined: Sun Dec 10, 2017 8:28 pm

Re: [USEFUL] A faulty charging board may cause mic and speaker problems

Wed Mar 14, 2018 1:28 pm

Craig wrote:
I've had my BV 8000 Pro for about 5 months and about a month ago my speaker volume is very very low won't turn up. And I work in a machine shop. could this be from fine metal? Or is there a way to fix? So aggravated about this. Thanks.

It is very possible and unfortunately the only solution is to open the phone and either replace the speaker or maybe you could try and clean it with compressed air but with the risk of ripping it. Opening the phone is not so difficult, the problem comes when you have to clean the old silicon and install new, because the gap is between the speaker and the body is very small. For mine I don't think it is IP68 rated anymore :lol: but I don't mind since the only protection I wanted was by rain drops ;) .
 
tony37420
Posts: 13
Joined: Thu Mar 08, 2018 2:54 pm

Re: [USEFUL] A faulty charging board may cause mic and speaker problems

Mon Mar 19, 2018 12:52 pm

Hello, I have the same problem with powder of metal in my BV6000 and my BV8000 pro.
So I had change the back side with the speaker (It was stick)
One month later I have change the front side
Now I have a phone with good sound, but the camera is very poor quality and the network has problem ...
Good luck for the work ;)
 
DusicaB
Posts: 1
Joined: Thu May 03, 2018 7:29 am

Re: [REMINDER] Charging board may cause mic and speaker problems

Thu May 03, 2018 12:42 pm

kavedel wrote:
Neville wrote:
zemecha wrote:
I replaced charging board. Phone now works perfectly.


Hi Neville. mine is also giving me a huge headache with a faulty mic. Can you help me by sending a photo or ref of that (new) charging board?

i'm from Portugal and it will be lenty of expensive to sent it to china.. (and time consuming)
Thanks


There is a Russian teardown video of charge board replacement here https://www.youtube.com/watch?v=_gqXcHqiPQA

Mic and speaker both get powered via chargeboard.

However, I DO now have a customer phone with distorted speaker that was NOT fixed by chargeboard replacement. Only option is to replace speaker. You have to dig it out, existing speaker will break, and clean out the sealant completely, then paste new sealant, insert new speaker, wait till it dries and reassemble. If you are not confident about doing that you will need to purchase a new back cover unit, which includes speaker and mic.

You can if you are careful do it yourself, but it involves stripping the entire phone down and reassembling it in new case. A wiser suggestion would be buy the back cover (USD30) and pay a professional phone repair store to do the work...an hour's labour.

Well, it took me 3 complete hours but I managed to replace the speaker. Now it works fine. As expected the problem with it was fine metal powder of grinding which reached to the speaker. Admin, can you please report that "problem" to the right department so you can design a phone completely covered by these kind of "accidents" :lol: . It would be a must among us people working in metal industry and for me a replacement phone after the BV8000 Pro I have now.

Hi! Yesterday I drop the phone and after that the speaker, microphone and the charging port are not working. Since i saw that you made it to replace the speaker, could you please explain me how to do this? Thank you!
 
kavedel
Posts: 80
Joined: Sun Dec 10, 2017 8:28 pm

Re: [REMINDER] Charging board may cause mic and speaker problems

Tue May 08, 2018 8:05 pm

DusicaB wrote:
Hi! Yesterday I drop the phone and after that the speaker, microphone and the charging port are not working. Since i saw that you made it to replace the speaker, could you please explain me how to do this? Thank you!

It sounds like you are having a more serious damage than me. Maybe your board is broken. If you think you can give it a try just follow the video showing how to open the phone and after that carefully remove the silicon around the speaker until you are able to take it out. It is not difficult to do so. The only thing you have to take care is to remove as much of the silicon as you can so you can have a clean surface for the new sealant you will use. I used  simple clear silicon applied with a toothpick and a needle!!! Let it dry for some time and then reassemble the phone. Be extra careful on the wire connections.

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