110v TV at 60Mhz

savi18 · 05-12-2018, 05:15 PM

I made a mistake on buying a Led Smart TV at 110v 60Mhz, I live in New Zealand which runs on 230/240v 50Mhz, I can get a step down transformer from 230/240v to 110v which is very small about the size of my palm so the voltage would be correct, anyone any idea's if there would be a problem running on 50 Mhz, I would not be using the inbuilt tuner for TV stations I will be using the HDMI port from my skybox.
This 28" TV is for my RV and one thought would be is to buy a 12v pure sine wave inverter at 110v 60Mhz from the States, the TV only needs approximately 40 watts at 110v to run, Thoughts Please.

Kenty · 05-12-2018, 05:23 PM

The cost of a pure sine inverter would be prohibitive. You should be able to buy a new 28" tv for less. I'm not sure about trying to run out on 50Hz but I suspect it would either not work or damage the tv over time.

carlsbad · 05-12-2018, 05:26 PM

Quote:

Originally Posted by Kenty

The cost of a pure sine inverter would be prohibitive. You should be able to buy a new 28" tv for less. I'm not sure about trying to run out on 50Hz but I suspect it would either not work or damage the tv over time.

Amazon has a pretty decent 300w pure sine inverter for $50.

BESTEK Pure Sine Wave 300W Power Inverter DC 12V to AC 110V with 4.2A Dual Smart USB Ports Car Adapter https://www.amazon.com/dp/B01DP9JE18..._DO29Ab9FT8XH9

carlsbad · 05-12-2018, 05:30 PM

Quote:

Originally Posted by Kenty

The cost of a pure sine inverter would be prohibitive. You should be able to buy a new 28" tv for less. I'm not sure about trying to run out on 50Hz but I suspect it would either not work or damage the tv over time.

Also, any electronic device that uses a wall wart can run off a modified sine wave inverter just fine.

Many of the newer televisions are actually DC and just use an adapter.

savi18 · 05-12-2018, 05:54 PM

Tried to get 28" TV here in NZ just not available, 24" plenty around but wanted 28", the TV is on its way from Amazon so will not know if it has power adapter or it may be wired direct, looked at the 300 watt pure sine inverter also, but still thinking on the idea off running on 50 Mhz,

boondocking · 05-12-2018, 06:04 PM

Motors don't like lower than rated hz, but a TV don't care about the 10hz difference.

**Flybob** · 05-12-2018, 06:12 PM

Check the manual for the tv. It may have an internal 120/240 switch. Many power supplies today are capable of either, just may not be a documented function.

savi18 · 05-12-2018, 06:30 PM

Quote:

Originally Posted by boondocking

Motors don't like lower than rated hz, but a TV don't care about the 10hz difference.

Read some where the same, LED TVs can adjust to 50 or 60Mhz just need to research more and you guys in the States will have a lot more knowledge to electronics, we only small country (only 1 million people here in the South Island) Cheers

savi18 · 05-12-2018, 06:31 PM

Quote:

Originally Posted by Flybob

Check the manual for the tv. It may have an internal 120/240 switch. Many power supplies today are capable of either, just may not be a documented function.

Will do that when I receive the TV, Cheers

MontyPP · 05-12-2018, 06:49 PM

I have a 28" Samsung 4000 from 2014 [remanufactured] (not a smart tv). Its marked 50/60Hz 36 watts

savi18 · 05-12-2018, 06:57 PM

Quote:

Originally Posted by MontyPP

I have a 28" Samsung 4000 from 2014 [remanufactured] (not a smart tv). Its marked 50/60Hz 36 watts

I emailed the manufacture TCL and replied 110v and 60Mhz. Model No TCL 28S305.

rsdata · 05-12-2018, 07:16 PM

110 VAC... use any cheap inverter... modified sine is cheaper and will work fine... hooked to a 12 Volt battery that is being charged via whatever they sell to charge a battery in NZ sounds like a great plan

the TV will convert any VAC to DC voltage anyway whether it uses a power brick, or does the conversion internally

the Hz (not MHz, Mega-Hz) only matters in motors... the motor speed will be slower

am willing to bet the TV on a 12 Volt battery to 110 VAC inverter will be fine

savi18 · 05-12-2018, 07:27 PM

Quote:

Originally Posted by rsdata

110 VAC... use any cheap inverter... modified sine is cheaper and will work fine... hooked to a 12 Volt battery that is being charged via whatever they sell to charge a battery in NZ sounds like a great plan

the TV will convert any VAC to DC voltage anyway whether it uses a power brick, or does the conversion internally

the Hz (not MHz, Mega-Hz) only matters in motors... the motor speed will be slower

am willing to bet the TV on a 12 Volt battery to 110 VAC inverter will be fine

The 12v batteries are charged via solar panel on my RV, had a reply from the manufacture and mentions cannot run on 230/240v only 210v and always thought TVs needed pure sine wave, if you think modified sine wave is fine then that wound be cheaper option.

rsdata · 05-12-2018, 09:20 PM

modified sine gives problems to things with motors in them... that is where you want pure sine...

I use inexpensive inverters from Harbor Freight to power laptops and TV's/DVD players all the time

Steve-W · 05-12-2018, 09:49 PM

Bigger issue than voltage (easy to resolve), frequency (should not matter in this case), is the TV standard. US sets are designed to operate using the NTSC standard, NZ uses PAL. not 100% positive but this may be the showstopper for you.

savi18 · 05-12-2018, 10:16 PM

Quote:

Originally Posted by Steve-W

Bigger issue than voltage (easy to resolve), frequency (should not matter in this case), is the TV standard. US sets are designed to operate using the NTSC standard, NZ uses PAL. not 100% positive but this may be the showstopper for you.

That's what worries me as well, will be using my satbox though the HDMI port and hoping that works. If it does not work will expensive mistake for me.

BobHanke · 05-13-2018, 01:06 PM

If this TV was manufactured to run in the USA, it might be set for 50 lines where European sets (PAL or SECAM) normally want 60 scan lines. If the power lead goes directly to a AC to DC circuit, you would not have to worry about what your source MHz is. 36 watts is well within the ability of a true transformer. Most can handle up to 50 watts. If broadcast TV is not needed, you won't need to consider the true frequencies of the local channels.

n0ms · 05-13-2018, 01:08 PM

Quote:

Originally Posted by carlsbad

Also, any electronic device that uses a wall wart can run off a modified sine wave inverter just fine.

Many of the newer televisions are actually DC and just use an adapter.

Most are DC. Read the model sticker.

On mine you send 240v or 110v and it knows what to do.

Larry-NC · 05-13-2018, 01:45 PM

Quote:

Originally Posted by boondocking

Motors don't like lower than rated hz, but a TV don't care about the 10hz difference.

Umm, not so sure about that.

Small appliances (TVs, monitors, computer printers) have small transformers to drop the line voltage to something in the range of 5-6 volts. The transformer impedance is designed for 60 Hz. The transformer will overheat at 50 Hz--same concern as with motors.

Nowadays a lot of appliances use switched-mode power supplies (SMPS) and that's not a factor. Manufacturers do that so they can ship a single model world-wide. If an SMPS is used, the appliance will usually be spec'ed for 110-240 vac, 50-60 Hz, and all you need to do is provide the right power cord.

The OP has stated that the specs for his new TV are 120 Vac, 60 Hz, so it probably has a transformer, not an SMPS.

Larry

DavidBo · 05-13-2018, 01:50 PM

Quote:

Originally Posted by Steve-W

Bigger issue than voltage (easy to resolve), frequency (should not matter in this case), is the TV standard. US sets are designed to operate using the NTSC standard, NZ uses PAL. not 100% positive but this may be the showstopper for you.

Good catch, that could be an issue. This exists:

https://www.amazon.com/dp/B008U23FMU..._t3_B0062BS09O

Reviews are varied but the price is right.

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