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Neville
Topic Author
Posts: 87
Joined: Wed Aug 16, 2017 7:36 pm

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

Mon Jan 22, 2018 2:27 am

I had a phone bricked out of the box. Refused to power up. Had already organised RMA but on a whim replaced charging board. Phone now works perfectly.

Had a customer with faulty mic and speaker. Previous solution was entire back cover replacement. Instead, I replaced charging board. Phone now works perfectly.

I have a hunch charging board may also be cause of mic dropouts during phone calls. Will test on next faulty unit and report back.
 
blackview_admin
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Re: [REMINDER] Charging board may cause mic and speaker problems

Mon Jan 22, 2018 10:02 am

Thanks for your precious feedback, Neville.
I'm adding your post to the sticky list as a reminder ;)
 
kavedel
Posts: 80
Joined: Sun Dec 10, 2017 8:28 pm

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

Thu Feb 01, 2018 8:07 am

Neville wrote:
I had a phone bricked out of the box. Refused to power up. Had already organised RMA but on a whim replaced charging board. Phone now works perfectly.

Had a customer with faulty mic and speaker. Previous solution was entire back cover replacement. Instead, I replaced charging board. Phone now works perfectly.

I have a hunch charging board may also be cause of mic dropouts during phone calls. Will test on next faulty unit and report back.


What exactly do you mean by saying faulty speaker?
 
Neville
Topic Author
Posts: 87
Joined: Wed Aug 16, 2017 7:36 pm

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

Fri Feb 02, 2018 9:23 am

kavedel wrote:
What exactly do you mean by saying faulty speaker?


The loudspeaker can only connect to the phone via the charging board...as does the mic. The phone's aerial also connects via the charge board.
 
kavedel
Posts: 80
Joined: Sun Dec 10, 2017 8:28 pm

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

Fri Feb 02, 2018 10:51 am

Neville wrote:

The loudspeaker can only connect to the phone via the charging board...as does the mic. The phone's aerial also connects via the charge board.

You have PM
 
zemecha
Posts: 4
Joined: Thu Nov 30, 2017 1:14 pm

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

Fri Feb 02, 2018 11:32 am

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
 
Neville
Topic Author
Posts: 87
Joined: Wed Aug 16, 2017 7:36 pm

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

Wed Feb 07, 2018 3:55 am

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.
 
kavedel
Posts: 80
Joined: Sun Dec 10, 2017 8:28 pm

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

Wed Feb 07, 2018 6:52 am

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.

Do you have any pictures or videos of replacing the speaker? I have the same problem and already ordered new one to change.
 
Neville
Topic Author
Posts: 87
Joined: Wed Aug 16, 2017 7:36 pm

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

Wed Feb 07, 2018 7:37 am

kavedel wrote:
[
Do you have any pictures or videos of replacing the speaker? I have the same problem and already ordered new one to change.


The video above takes out charging board. Speaker is underneath that. You can prise dead speaker out...it has some kind of waterproof glue sealant around it. I assume you can use a silicon sealant but Blackview admin may know what sealant is used.
 
kavedel
Posts: 80
Joined: Sun Dec 10, 2017 8:28 pm

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

Sat Mar 10, 2018 9:08 pm

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.

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