Hikvision 2cd2t85fwd disconnection problem

[ste92]

hello I have a problem with a hikvision 2cd2t85fwd camera connected to a Uniview Nvr

I have connected this camera for years and it has always worked well and another hikvision camera to a uniview Nvr. for a month it started to disconnect and then reconnect and at a certain point it is no longer detected by the nvr, I also tried to turn off the nvr but nothing.

I updated the hikvision cam to the latest firmware available and I also updated the nvr, I also reset everything from factory settings, then I reconnected the cam but it still has this problem, the 2cd2t85fwd camera disconnects after about 2 hours

I tried to connect another new hikvision camera, always the same model, and that works, so the network cable has no problem, it's a camera problem, so I tried to power the camera from a 12v power supply and it works

Do you think if I replace the internal poe module (electronic board) could that be the problem? Has a similar problem already happened?

Thank you

 

[JB1970]

I tried to connect another new hikvision camera, always the same model, and that works, so the network cable has no problem, it's a camera problem, so I tried to power the camera from a 12v power supply and it works

Do you think if I replace the internal poe module (electronic board) could that be the problem? Has a similar problem already happened?

I'd check the female RJ45 connector first. It only takes a tiny amount of moisture/condensation to track between the pins. That shorting while the camera is powered causes corrosion to the pins, creating a high resistance connection. Looking into the female connector all pins should be clean and shiny (when I eBay used Hikvision cameras I always include a photo inside the connector to show no moisture damage)

I could be wrong but there used to be a tiny board in the cable where the single cable to the camera splits to the network cable and 12V DC cable. I doubt that would be easily replaceable.

 

[ste92]

thanks, I tried to clean the contacts of the female rj45 but nothing

but why with 12 volt power supply it works and I can access and if connected via poe it doesn't work? I can't understand

 

[JB1970]

thanks, I tried to clean the contacts of the female rj45 but nothing

but why with 12 volt power supply it works and I can access and if connected via poe it doesn't work? I can't understand

Because the little PCB I mentioned that’s sealed within the cable is faulty and using a 12V DC connection bypasses it.

 

[ste92]

this?

 

[JB1970]

this?View attachment 12996

No. I’m referring to where the two individual cables split/become one. I saw a post showing that there’s a tiny circuit board within that casing that converts the PoE voltage down to 12V DC. I’ve not seen it myself and I’m not about to butcher a working camera to show it.

I’d say ultimately you have two choices:

- power the camera via 12V DC
- replace the camera

It’s unlikely to be repairable unless you have a complete spare harness.

 

[ste92]

ah ok I understand, I was thinking of disassembling and replacing that module
or I buy a splitter like this

 

[JB1970]

ah ok I understand, I was thinking of disassembling and replacing that module
or I buy a splitter like this

I guess the splitter is the easiest option