Feeling346

[Feeling346]

Hello all. This is my first posting. My problem is getting a TV to work on my 12volt boat. The TV is a Samsung 24 inch LED and it's brand new. It would normally run on 14volts DC coming from a transformer that's plugged into 240volts AC mains supply. So I bought a DC-DC boost converter and wired it into the 12volt supply on my boat. With a multi meter I then adjusted the output to 14volts. I plugged this in to the TV and it killed it instantly! The shop replaced it and I started afresh. I tested the new one at home first so I knew it was working ok. I then came to the conclusion that I needed a DC-DC boost converter that controlled not only the voltage but the current as well. These are often used to drive LED displays and apparently it is essential that you control the current to LEDs or they will self destruct. I carefully set the voltage to 14volt maximum and the current to 2 amps. The AC transformer that came with the TV supplies 2.5amps maximum. I plugged the new DC-DC converter in and the TV worked perfectly. I switched it off and 5 minutes later switched on again and it died instantly emitting a little puff of smoke in the process. Fortunately the shop replaced it again. After much thought I bought yet another DC-DC boost converter but this one had a digital readout of both volts and amps. So yet again I set it up and plugged it in and it worked perfectly. The digital readout on the converter also displays the actual voltage and current being drawn by the TV and it showed just over 13volts and about 1.6amps current. I switched it off after about 15minutes went and had a coffee, came back, switched it on again and the TV instantly died accompanied by a puff of smoke from the back. To so I am perplexed would be an understatement. HELP!

 

[Artic Warrior]

Ive always put mine throu an inverter 12 to 240 volt and it was modified sine wave

 

[nortada]

Sorry to hear about your problems.

You may get a bigger response if you launch this thread on Reader to Reader or a Techie sub-forum rather than the Liveaboard Link, with it's largely overseas clientele.

Assume you are about to exchange the TV so best of luck with the next one.:encouragement::encouragement:

 

[RobbieW]

Cant give you a technical answer though I've had a similar experience. I tried running the TV onboard using a direct DC feed which blew the TV after a few days use, supplier replaced it and I've run it from an inverter ever since. I'd be surprised if it was current issue as devices draw what they need, its difficult to force feed them; voltage may be another issue and perhaps a boat supply is just too spiky or unstable though your DC-DC should have sorted that