Poe not working

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Revo2Maxx
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Poe not working

Post by Revo2Maxx »

So tore into one of my 4mp POE AI cameras today that I had my son pack up and send me. Anyway camera works now on 12v only after I found the issue. The SMD inductor for the POE circuit has exploded my guess from the Winter storm and the cold to warm cycles causing moisture buildup? Now the problem is there is no Schematic. Looking up just a general Schematic for a POE circuit gives my ideas but the diagrams are no where the same and inductor they used isn't same type or even close. What did I learn well the Gell packets are past there prime and had they been replaced the cameras I am sure would have been fine.

No marking on package tore in some other poe cameras to try and measure the value to find replacement yet to find one setup like this one lol.
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Revo2Maxx
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Re: Poe not working

Post by Revo2Maxx »

Oh reason it didn't work before on 12v is because the small copper bits that exploded caused internal short. Removed Short 12v works now to find what this small snd inductor value was I will make work again on POE
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Revo2Maxx
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Re: Poe not working

Post by Revo2Maxx »

Had someone ask why I would not just replace the camera. The cost of this camera was just under 300. The cost for me to repair it once I wait for the part from China will be less then a cup of Coffee. It is a Pro Ai Camera and I use the features it offers.

Good/Bad news is out of the 6 AI cameras only 2 are dead the others were the results of the 2 being dead.

Bad of that news is my AI zoom camera is the other one that is dead. I think after looking at it tonight found what the cause is. Still TBD and this camera cost more then the other and should cost less than a cup of coffee to repair also.
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Second dead camera.
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Revo2Maxx
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Re: Poe not working

Post by Revo2Maxx »

So took another one of my 4mp AI cameras apart to see if I could figure out what size common choke (Differential Mode Choke) I would need. This camera oddly uses same FW as my other but has some extras built in. One the camera is also color at night but has 4 white leds and built in Mic. It does have same power board so thats good.

Here is picture of power board with good choke. Oddly my 858 has same choke on the wifi part of the Camera Module circuit board. Top pic is from good power board bottom pic is from the 858 camera pcb.
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