View Full Version : Creeping current on the antenna connector

10-17-2012, 08:05 PM
Hello to everybody!
During the last few months I bought two identical TV sets 32PFL55K/12. Equipment runs quite fine. Wanted to optimize the closed circuit TV cable a bit (adjusting the antenna amplifier at the entrance of the TV cable in my home). During this operation I noted that all the antenna cables were under current (my security screwdriver with a neon control warning light turns on). So I started to disassembly the whole cable salad to find the source of the creeping current: it were the cable antenna entrances of both brand new PHILIPS TV sets!
I thought: use your old trick: turn around the electricity plug of each of the TV sets and that will do!

But the result was negative: the antenna connectors (both the earth line and the antenna line) remain under current on both TVs.

I have another TV set and a video recorder on the network (which now all are under current) and I am afraid that this creeping current might damage this other equipment.

1) Please check if your PHILIPS TV also putts high voltage on your antenna lines (screwdriver with neon bulb will light up) and inform me about the result of your test
2) Is somebody out there with a viable solution?

Best regards, Ernesto

10-23-2012, 10:24 AM
Hi Ernesto,

Thanks for your valuable feedback. We are currently looking into this and we will reply as soon we have an answer.


10-23-2012, 04:21 PM
Hi Ernesto,

As promised, here is the reply from development:

It is normal to measure a voltage around 100-120 Vac between the secondary ground of TV sets ("cold" part) and the earth connection.
To comply with legal electromagnetic radiation requirements, multiple capacitors are present on the power supply of the TV between the mains and accessible parts.
Due to this high resistance coupling, the leakage current is far below the legal Safety requirements (below 700ľA) to avoid electric shock, but the voltage is high enough to light up this neon light of yours (a normal "filament" lamp will not light up).
To ensure the mains insulation, all TV’s pass a high voltage test of 4240 Vdc on the production line, before being placed on the market.

Hope this answer is sufficient. It's maybe a bit too technical?

Kind regards,