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bernhard
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Joined: Fri Feb 16, 2018 11:23 am

[SOLVED] two new bv8000s leaky at exactly the same place on the housing

Fri Feb 16, 2018 7:13 pm

Hello, my name is Bernhard.

I recently bought a BV8000 as a motorcycle navigation system. In order to check the waterproofness I sunk it into a bucket of water for about 20 minutes. When I took it out and it worked for a while. Suddenly the screen flickered and it just crashed.

Then I screwed it on and found that there was water inside. I dried it and reassembled it. Then I wanted to know where the water got in. For this I put my lips on the case, where the top and bottom meet and tried to suck in air. On the upper side (where the brightness sensor, camera etc. is located) I could suck in air without any problems.
I then disassembled the device and looked at it again. Either the edge that presses into the sealing rubber is too small or the sealing rubber is too deep, so that the edge cannot exert enough pressure on the sealing rubber. Thereupon I applied sealing compound (Hylomar or similar) additionally on the seal, let it dry slightly and reassembled it. Now I couldn't suck in any more air at this point. Then I repeated the water test and no more water entered.

Since I wanted to know if I had gotten a monday device or if there was a production error, I bought a second BV8000. Also at this one I was able to suck in air at exactly the same place (at the whole upper edge of the housing) again without any problems, so that also this one is not waterproof.

Which of you have actually left your phone in the water for a longer time? Can you please check your BV8000 if you can suck air at the upper edge of the case without problems?

Kind regards
Bernhard
 
blackview_admin
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Re: two new bv8000s leaky at exactly the same place on the housing

Fri Feb 16, 2018 7:27 pm

Hi there! i really think that you only got 2 bad devices. It can happen.
Can you take some photos about the defect, your test and your solution?
 
Neville
Posts: 83
Joined: Wed Aug 16, 2017 7:36 pm

Re: two new bv8000s leaky at exactly the same place on the housing

Sat Feb 17, 2018 1:58 am

bernhard wrote:
Hello, my name is Bernhard.

Then I screwed it on and found that there was water inside. I dried it and reassembled it. Then I wanted to know where the water got in. For this I put my lips on the case, where the top and bottom meet and tried to suck in air. On the upper side (where the brightness sensor, camera etc. is located) I could suck in air without any problems.

Bernhard


Without detracting from your post, which is important, please be aware that the suck test may or may not be relevant. The casing is designed to withstand about 2psi of pressure (the weight of static water at 1.5m which reaches 14.7 psi at about 10 metres deep), whereas your suck test will easily exceed that 2psi pressure so it isn't the right test.

There is a problem with a batch of Blackviews missing rubber o-rings...are they all accounted for on your phones? Are all casing screws tight?

An easy test is to submerge your phone in water and constantly check for micro air bubbles. Any water that gets in has to displace air.

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