Existig CCTV Setup lost image

[jonny392 0]

So I have a cctv set up which has a ptz camera for use around the yard, it has a power supply in a shed outside, the cat5 cable is then underground to the house where it is plugged through a balun into a dvr, the system has worked for 2 or 3 years but went to use it the other day and everything works apart from there is no image. I can turn the camera using my phone and laptop and the date/time is in the top right hand corner of the screen although the rest of the screen is just shown as a dark grey. What could be the problem?

[Numb-nuts 1]

Restart the PTZ Camera, break the power and reinstate it 24vac probably.

Likely this will sort it out as it sounds like a stuck iris. If Not,

 

Next swap that camera to another channel to eliminate your DVR as the culprit

MY next guess would be to check the baluns are connected properly at both ends.

I'd remove them and try then with another camera briefly to eliminate them as the cause.

Then I'd take the video pair and leave an open circuit and test them for open circuit and

then twist one end together and test for a closed circuit. If all of these tests pass, then it

may be your camera itself.

 

Some can be repaired or replaced others cheaper ones may prove to be uneconomic to repair.

In the latter case there are numerous cheap and IMHO quite good value ptzs from China on

ebay, aliexpress and DHGate.

 

With any luck it will be something really simple. The most likely possibility is a fractured solid copper conductor in the balun screw terminal. If that turns out to be the case, strip the conductor back and if possible get some wiring end-ferrules and crimp onto the stripped conductors before reinserting into the balun.

 

End ferrules Cheap low cost crimp plier for ferrules

[jonny392 0]

Hi,

 

Thanks for the information.

 

I was wondering if the power supply I am using at the camera is sufficient (output 12v 3000mA):-

 

http://www.ukcctvsystems.co.uk/qvis-mini-ptz-mini-ptz-dome-12x-without-wdr-500tvl

 

The camera in the yard is about 50 feet from the power supply for the camera which is also in the yard.

The house is about 150 feet from the camera.

 

Thanks

[jonny392 0]

Should I upgrade the power supply to 12v 5amp?

 

Thanks

[jonny392 0]

Moved the power supply to directly beside the ptz camera but made no difference still black screen.

 

Any other suggestions?

 

If its a stuck iris how can this be resolved?

[the toss 0]

You said previously that it was a grey screen & now your saying it is a black screen. They can mean two different things

[jonny392 0]

Its a dark grey screen with date/time in the corner.

[jonny392 0]

This is what I am seeing

[Numb-nuts 1]

I give up!

[cctvmann 0]

where are you based, have you tried connecting a working camera to the video cable at your ptz end to see if an image appears on the screen

[tomcctv 190]

 

Hi. Have you pressed this button about 10x ??

 

 

But yes better power supply would help.

 

If you still have control over your PTZ data then it is your video link that has the problem

 

Check baluns at each end

 

Another is do a camera reset by hitting 11 on number keys and then reset on screen menu

[jonny392 0]

What button is that? no image showing.

 

I haven't got a spare camera to try.

 

If anyone knows where I could get a balun like this let me know:-

 

http://adata.co.uk/ttp111vpd

[tomcctv 190]

How many baluns are on your cable ?

 

You can use other type of balun the one you have listed are not the best. And that type is not good if you update your PTZ at a later date

[jonny392 0]

What type of baluns should I use and what wires go where?

 

What would it do by pressing that button a lot?

[secplus 0]

take the camera out, put it next to the DVR, give it power, and use a coax line to test it out, if it works then is the wires, which then use a separate pair for video, if it doesn't then the camera is bad. simple as that.