White sceen

[dodgevan 0]

Hope you can help

I am running an avermedia nv5000 card with baxall camera and ernitec 6.90 motorized lens.

The system is wired in cat 5 with baulns

The problem i have is the camera has been fine for a couple of years

now all i get is a white screen .

when is starts to get dusk the camera is ok in daylight its white.

I have taken the camera down wired it into the card and all is ok i put i back outside and back to the white screen.

Any ideas

As i have not changed a thing.

[Soundy 1]

If the lens is an auto-iris type, it could be that the lens is stuck wide-open, so the picture is washing out in the daylight.

[dodgevan 0]

Checked the lens that is ok.

[forbus 0]

yepp.. lens it is.

[dodgevan 0]

Replaced the lens and i still have a white screen in the day ok at night.

[tomcctv 190]

Replaced the lens and i still have a white screen in the day ok at night.

 

 

could be a bad negitive connection. (-) re do all your ends. and also check what power you have at camera end.

[forbus 0]

Maybe the cameras sensor is malfunctioning, not being to tell the lens it is receiving sufficient light. So, the camera might be bad.

[dodgevan 0]

Tried another camera checked cables all is ok.

Could it be the card ?

[tomcctv 190]

Tried another camera checked cables all is ok.

Could it be the card ?

 

 

 

with what you have said. then no it cant be the card ( removed camera and pluged direct into dvr ... fine) tried another camera checked cables all is ok............ then was it the camera ???

[dodgevan 0]

the only other thing that it could be is the baulns.

I have ordered some new one to try.

keep you posted

[dodgevan 0]

Replaced the baulns .

That did not work

So to update what i have done .

I changed the camera

Tried another lens

Changed the cable

Changed the Baulns

Took out the card and tried that in another computer.

And i still have a white screen in the day fine when it starts to go dusk .

The only bit that has not been changed is the board so i am wondering if its duff.

[dodgevan 0]

I am still having problems with white screen.

Tried just about everything.

Any ideas ?

[rory 0]

and other types of cameras also experience this, or just this camera?

Seems like a bad or inadequate camera.

If it has any settings try switching it to Electronic Iris (EI or EL)

[dodgevan 0]

Have tried different cameras.

The camera i am useing is a Baxell with Ernitec zoom lens

[tomcctv 190]

If you have changed everything i.e camera/lens/baluns/cable then it can only point to one thing. camera settings on DVR.

 

on the nv5000 under camera settings at bottom left you will see boxes ...noise reduction / auto brightness control and night view.

 

 

pick your camera from your camera list at the top that has the problem. then un tick all boxes noise reduction / auto brighness / night view. and then set the brightness and contrast from the slide bar till your image is right. remember to click OK at the end.

[dodgevan 0]

Tried ajusting brightness noise etc still the same.

But when it starts to get dusk it works great.

Had differant cameras set up still the same .

Its worked fine for a few years till now.

[tomcctv 190]

Tried ajusting brightness noise etc still the same.

But when it starts to get dusk it works great.

Had differant cameras set up still the same .

Its worked fine for a few years till now.

 

 

 

then i would go back to my first post about power. at the camera end. disconnect the camera and put a meter across + and - on your power and i think you will see 0 volts. then put 1 prob on power + and the other prob on the outter of your BNC and you will get 12volt.

 

i think your power supply is giving + (pos) and nothing from - (neg)

[dodgevan 0]

That was the first test i tried all is well on that front.

[tomcctv 190]

That was the first test i tried all is well on that front.

 

 

did you disconnect the camera first???

 

can you list how you have cable / power/ power supply used / type of balun used / distance of cable / amps of camera / amps of power supply / number of cameras on your system.

[dodgevan 0]

Camera was wired first useing cat5 cable with LLT-202c baluns which i have changed.

I am useing a 1amp power supply on just one camera.

Cable length is about 30feet.

 

I appreciate your help.

[tomcctv 190]

Camera was wired first useing cat5 cable with LLT-202c baluns which i have changed.

I am useing a 1amp power supply on just one camera.

Cable length is about 30feet.

 

I appreciate your help.

 

I am running an avermedia nv5000 card with baxall camera and ernitec 6.90 motorized lens.

.

 

 

 

 

a baxhall and a motorized 90m lens will need more than 1 amp to run. are you also controlling the lens ?

[dodgevan 0]

No i am not useing any power to control the lens.

[rory 0]

it points to the Iris.

When the Iris is stuck open to a point it will let in too much light, so in the day it is whiteout.

Ive seen this many times.

First thing to do, if the camera has Electronic Iris change it to that.

If it still does it then there is something wrong with the camera and it needs to be replaced.

 

As you said you changed the lens and its still doing it, if its an Auto Iris lens, with the Iris mechanism built into the lens, it would be rare that 2 lenses would be sticking, so could be the Auto Iris module on the camera is bad, meaning bad camera. Or its just not providing enough power to the lens.

[tomcctv 190]

No i am not useing any power to control the lens.

 

 

motorized 90m lens and you have no control ??? how are you controlling the iris ?? if you are not using the controls then you should have a ernitec cable addaptor between the lens and the camera that has manual iris control pots. do you have a standard lens to try ?

[dodgevan 0]

I am setting the lens up with a 9v battery once focused that will be it.