sjsturner Posted June 16, 2013 Share Posted June 16, 2013 If you struggle do let us know. Link to comment https://www.thesecurityinstaller.co.uk/community/topic/34781-camera-down-after-power-down/page/2/#findComment-327864 Share on other sites More sharing options...
arfur mo Posted June 16, 2013 Share Posted June 16, 2013 Interesting point about the IR because the newly connected camera is an internal IR one, much closer to the PS than the one that went down have you fed power by tapping from the new camera to the old one? if so what size power cables have you installed? to test if the ir's will cause an issue, simply mask both camera (so turning on IR's) and read the voltage at the furthest camera. below 11 vdc then you could also link 2 positive outputs together in the psu, to the supply line which will provde 1amp assuming cables are of decent gauge and not to long. If you think education is difficult, try being stupid!!!! Link to comment https://www.thesecurityinstaller.co.uk/community/topic/34781-camera-down-after-power-down/page/2/#findComment-327867 Share on other sites More sharing options...
fozzies Posted June 16, 2013 Share Posted June 16, 2013 The fact that the dvr reported loss of cam when you unplugged it suggests it was still giving an output. Maybe the lens got stuck closed? Link to comment https://www.thesecurityinstaller.co.uk/community/topic/34781-camera-down-after-power-down/page/2/#findComment-327911 Share on other sites More sharing options...
cybergibbons Posted June 17, 2013 Share Posted June 17, 2013 I've seen video equipment produce sync pulses (which is how "signal") but nothing else when the power is marginal. I have a blog, some of which is about alarm security and reverse engineering:http://cybergibbons.com/ Link to comment https://www.thesecurityinstaller.co.uk/community/topic/34781-camera-down-after-power-down/page/2/#findComment-327914 Share on other sites More sharing options...
sixwheeledbeast Posted June 17, 2013 Share Posted June 17, 2013 I've seen video equipment produce sync pulses (which is how "signal") but nothing else when the power is marginal. Correct. I also say power issue. Try removing the camera you installed. Try testing the voltage at the camera ends. Test mA readings from each output. Link to comment https://www.thesecurityinstaller.co.uk/community/topic/34781-camera-down-after-power-down/page/2/#findComment-327940 Share on other sites More sharing options...
skywalker Posted June 17, 2013 Share Posted June 17, 2013 sounds like the iris was staying closed at the old cam. it happens sometimes, and restarting usually fixes it. but as others have said, it could be because the power limit was right at the edge. so everything was powering up, but there wasn't enough power to drive the auto iris motor. Link to comment https://www.thesecurityinstaller.co.uk/community/topic/34781-camera-down-after-power-down/page/2/#findComment-327991 Share on other sites More sharing options...
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