Shocks from DVD players

In a nutshell NO. All insulated (class 2) here in the UK are supposed to be ALL INSULATED.

Your problem may not be a direct earth fault but some capacitive/inductive voltage that is a feature of the on board electronics. DVD units operate from a 12/24 volt secondary supply via an isolating transformer - so the shocks should not be mains born as mentioned. Check with a load of some sort - say a table lamp to neutral and check if the lamp takes any current via in line amp meter. If not then seal the protruding screw head. Otherwise throw away 'cos they are not worth fixing

Frank

Thanks Frank

Thanks for your promt response, Frank. I will try that test when I go back next time. I'm pretty sure there is next to no current as I was touching the screws and not getting a shock. (could be just my thick skin). Another possible solution has been recommended and I would like to ask your opinion.

Earthing the shield of the coaxial cable should bring the secondary side of the DVD player back to earth potential. Sounds good but could it create any other issues?

Frazza

The coax should remain volt free - unless it is supplying a signal line via designated source to trigger a remote device ie Satelite receiver etc. Misc uncontrolled capacitive induced emf's within the coax can produce all kinds of weird things to other coax looped equipment.
But to answer your question - the inductive voltage would only disappear if the earth was 'true'. Since all the equipment is earth free any disappearance of the voltage would be misguiding because the 'grounding' would be only particular to the specific location - and could therefore arise if the equipment was moved to - lets say another room.

Frank

Is it possible that the power supply transformer secondary is grounded to the chassis and the neutral and hot leg are reversed on the line side of the transformer?

Hi Random,

I guess it's possible: The power points are definately connected correctly though. If this was a fault It would be unlikely to be present in 3 separate devices.

It's certainly a train of thought worth exploring. (process of elimination)

I won't be back there till next week. to check.

But will keep you informed.

Cheers

FrazzalDazzal said:

I guess it's possible: The power points are definately connected correctly though. If this was a fault It would be unlikely to be present in 3 separate devices.

It's certainly a train of thought worth exploring. (process of elimination)

I won't be back there till next week. to check.

But will keep you informed.

Cheers

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What about the circuit wiring? Have you plugged them into a different circuit to check?