Live chassis warning

[ryantheleach]

Hi i have a tv i was planning to use for an arcade cab, connected to a jomac board.

theres a warning on the back of the Tv high voltage etc, but also says that it has a live chassis.

while browsing the monitor section I've picked up the idea that this is more dangerous then other Tv's and was wondering if anyone knew whether this would make it harder in any way.
e.g. the type of board i will need/better safety precautions when decasing?

thanks.

[lilshawn]

its just that some of the heatsinks or other exposed metal (fuse clips, screws etc) may be carrying high voltage. mount it to wood to be sure.

no big deal, just keep your mitts off things while its running and you will do fine.

[MonMotha]

It probably means that the TV has an unisolated power supply.  This is fairly common on older TVs.  Basically, every single thing inside that TV is referenced to AC line voltage, so just about anything is a shock hazard.  They then isolate the inputs in some cheap way (usually just a capacitor on the RF input).  As long as you don't touch it while it's plugged in and only use the inputs the TV came with (don't go trying to hack RGB straight in or something like that), you should be fine.  That warning basically tells servicemen to use an isolation transformer if they plan on working on it.

If in doubt, you can always run it off an isolation transformer.  This is what arcade cabinets conventionally did before isolating power supplies started to show up on monitors.

[StephenH]

It means one side of the chassis is directly connected to the AC line.  If you plan to use this as your display connected to a gameboard or computer I would recommend the use of an isolation transformer.