12V Televisions

Submitted: Monday, May 04, 2009 at 07:45
ThreadID: 68496 Views:6587 Replies:10 FollowUps:11
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Hi,
We have a van with a 12V power supply (on board battery) - the van has 2 12V plugs (2 pins) & I use a short lead so I can use cigarette lighter type plugs where necessary.

My questions relates to using a 12V TV. (I am an absolute novice when it comes to 12V). Last week I bought a 19" TEAC which will operate on both 240V or 12V DC. It did not come with any 12V lead etc. Two questions :-
(a) can I use a basic lead to go from the cigarette lighter plug to the TV (Dick Smith has them)
(b) I have a modified sine wave inverter. Would I be better to buy the optional TEAC power adaptor & use the inverter?
I mainly use C/Parks but spend the occasional night elsewhere & it would be good to watch a little TV.
Any help would be appreciated
Willy
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Reply By: oldfart1953 - Monday, May 04, 2009 at 08:00

Monday, May 04, 2009 at 08:00
Hi,
I also have recently replaced my TV in the van it also is a 12/240volt unit.
I believe the unit you have will be similar to mine in operation. Essentially the TV will be a 12volt unit using a 240volt transformer.
The power lead that came with the TV does it have an in line transformer? The lead coming out of the transformer (that goes to the TV) will be the 12v supply lead & this lead will/should be able to be removed from the transformer. To this lead you will be able to fit an adapter plug that will go in to you 12 plug or socket.
I dont have an inverter in my van so my TV works away very happily on 12volts.
I hope this of some assistance

CU down the road
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Follow Up By: Willykj - Monday, May 04, 2009 at 08:45

Monday, May 04, 2009 at 08:45
Thanks. Mine is different in that does not have a transformer/adaptor. The TV has a normal 240V cord which goes directly into the TV. It then has a separate 12V input on the TV but I did not receive any leads etc. The book says very little other than don't plug in both 240V & 12V.
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Reply By: Gone Bush (WA) - Monday, May 04, 2009 at 08:16

Monday, May 04, 2009 at 08:16
The TV must have come with a cable that plugs into 240Volts. Just use that in your inverter. No need to buy anything else or modify anything.

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AnswerID: 363086

Follow Up By: Willykj - Monday, May 04, 2009 at 08:47

Monday, May 04, 2009 at 08:47
Thanks. I know I can do that but I was wondering whether you can run a TV on a modified sine wave inverter. I know lots of electronic things need a pure sine wave one which is a lot more expensive.
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Reply By: Member - joc45 (WA) - Monday, May 04, 2009 at 11:23

Monday, May 04, 2009 at 11:23
Hi Willy,
Was the product supplied in a completely sealed package? I'm surprised that the TV, if specified as having a 12v input, didn't come with a suitable cord for 12v. I'd be checking with TEAC in this regard to see if the cord has been inadvertently omitted.
The 12v input is most likely a common low-voltage concentric plug/socket (avail Dick Smiths, Jaycar, etc) with +ve as the inner pin, but sometimes these dislexic manufacturers decide to reverse the polarity, so one has to be very careful when making up one's own plug and cord.
If the TV specifies 12v input with no reservations, then it is intended for operating directly off your 12v battery; ie, will safely operate from about 12v - 15v. This will be a bit more efficient than running the tv via your inverter.
Gerry
AnswerID: 363116

Follow Up By: Member - Cram (Newcastle NSW) - Monday, May 04, 2009 at 12:00

Monday, May 04, 2009 at 12:00
I have one fo these TV's, just got it and I was thinking the same thing why does the unit have a sealed power cord?

I will make some inquiries today and see what i can work out. If I find out anything I will post it.
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Follow Up By: Member - Cram (Newcastle NSW) - Monday, May 04, 2009 at 12:15

Monday, May 04, 2009 at 12:15
I am now actually wondering whether these TV's are 12 volt now that I am lookling more closely. On the website it states that the power is

AC/12V DC Input

However, when you look at the product sheet it states the power is AC 100-240v

http://www.teac.com.au/cmsutil/file.php?file=product_sheet_563.pdf

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Follow Up By: Member - Cram (Newcastle NSW) - Monday, May 04, 2009 at 12:41

Monday, May 04, 2009 at 12:41
Ok, have a look on page 12 of your manual and it shows how this all works....

http://www.teac.com.au/file/product_manual_563.pdf

So I guess that a 12volt cord, like is mentioned earlier may in fact work although you may as well use an inverter.
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Follow Up By: Member - joc45 (WA) - Monday, May 04, 2009 at 12:41

Monday, May 04, 2009 at 12:41
Sorry, when I asked about sealed packaging, I meant, was the box completely sealed, or had someone perhaps unpacked and repacked it, leaving out the important DC cord?

JB HiFi's website show it as AC/12v input.
http://www.digitalhome.com.au/Tvs_And_Home_Theatre/Teac/LCDV1955HD_19_INCH_LCDDVD_COMBO_HD_TUNER/26069

Gerry
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Reply By: Von Helga - Monday, May 04, 2009 at 13:03

Monday, May 04, 2009 at 13:03
WillyKJ,

I think what you have is a 12 volt TV with an inbuilt tramnsformer to enables you to run it on AC power, seamlessly to the user.
It is very in-efficient to use an inverter to provide AC power.
If you can source a DC cable that fits (cost prohibitive) then use it run the TV on those occasions that you are not connected to AC power.
Cheers
Trevor
AnswerID: 363132

Reply By: HGMonaro - Monday, May 04, 2009 at 15:18

Monday, May 04, 2009 at 15:18
my little LCD has a inline transformer on the 240V powerpack but I have used the TV direct off a 12V supply using a homemade 2 pin 12V to ciggy cable convertor like what you describe. I used a DVD ciggy plug cable to connect the TV to the convertor cable thingy. So, I'd suggest option A is worth following up... you might have a suitable cable with some other electronic gismo (incar DVD player, GPS, etc)

Cheers, Nige
AnswerID: 363150

Follow Up By: Member - Old/new Girl (QLD) - Monday, May 04, 2009 at 17:11

Monday, May 04, 2009 at 17:11
Willykj
Well we went through the same thing. Vidcam in Toowoomba is were we bought the new cord from for around $40. it came with a few adaptors for the end of the cord. The fella told me to make sure you use the correct conection using the information on the 240 lead or I could be up for a new TV. Lucky i didnt try any of the cords we have sitting around the house like the computer one. Just another thing to consider.
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FollowupID: 630815

Reply By: Member - Mark C (NSW) - Monday, May 04, 2009 at 18:23

Monday, May 04, 2009 at 18:23
Just purchased the same tv and was advised the manufactures cant supply direct 12 v cord. The plug in tv is easy to match so I am hoping the one I have will connect straight to the jayco two pin plug in camper. Havent tried yet but seems pretty straight forward. Have just posted thread on aerials and would like to know what you have for an aerial and if it works ok.
AnswerID: 363195

Reply By: Ozymacca - Monday, May 04, 2009 at 19:33

Monday, May 04, 2009 at 19:33
I have the same TV. Dick smith or Teac did not supply 12volt lead I was able to purchase it separate @ a cost of around $40 from them. Yes I fell over backwards when they told me the price. I have since made a couple of 12volt leads for a friend purchasing everything from jaycar approx $10 per lead. They sell one complete that looks similar for around $6 complete but it is useless.The teac _Affordable_Storage_Drawers.aspx around 5amps has a dvd player as well. I hope this helps Willy. Works like a charm with the 12volt lead Willy

Cheers Macca
AnswerID: 363221

Follow Up By: PeterInSa - Wednesday, May 06, 2009 at 16:58

Wednesday, May 06, 2009 at 16:58
Macca,
I missed this thread earlier. This morning I ordered a 12v cable from Teac was initially told will be in by Friiday as a cost of $75 now told it will takes at least 2 to 3 weeks. Could you tell me the Dick Smith part Number if possible. I would prefer to buy a complete unit rather than make one up just in case I get the polarity wrong.

Peter
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FollowupID: 631177

Follow Up By: PeterInSa - Wednesday, May 06, 2009 at 17:28

Wednesday, May 06, 2009 at 17:28
Readubg Kens post below, it looks like I will be making teh cable up.

Peter
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FollowupID: 631184

Follow Up By: PeterInSa - Wednesday, May 06, 2009 at 17:33

Wednesday, May 06, 2009 at 17:33
Looking at my spelling errors will definitely need to double check the polarity
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FollowupID: 631186

Reply By: kenann - Monday, May 04, 2009 at 20:16

Monday, May 04, 2009 at 20:16
I have also brought the same set. Purchased the plug and cable from Dick Smith and wired into the 12v system with a fuse.
If going down this track i would take the set into Dick Smiths to get the right plug as they have numerous ones of different lengths and diameters. Make sure you get the polarity right. I checked with a volt meter after assembly. If i remember right the centre pole is positive.
Ken
AnswerID: 363236

Reply By: GerryP - Monday, May 04, 2009 at 20:28

Monday, May 04, 2009 at 20:28
Hi Willy,

It would also pay to try and find out what the acceptable DC voltage range is for the set. Just thinking that if you plug the van into 240 and your battery charger is charging, you may be getting around 14.5 volts to the battery and hence to the TV.

I have experienced this problem with some retro fitted fluoro ceiling lights that all expired after a few weeks. Ended up replacing them under warranty then putting a heavy diode in series with each one to cut the voltage down - so far so good after a couple of years on.

Cheers
Gerry
AnswerID: 363239

Follow Up By: PeterInSa - Wednesday, May 06, 2009 at 17:27

Wednesday, May 06, 2009 at 17:27
I may have to purchase a 12 volt regulator from Jaycar as with solar I have seen the on board batteries reach 14.3 volts.

Peter
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FollowupID: 631183

Reply By: Willykj - Tuesday, May 05, 2009 at 15:40

Tuesday, May 05, 2009 at 15:40
Thanks to everyone for their replies.

Now have a 12V lead from the caravan plug direct to the TV. Works fine...

Heading off next Monday for 3 months - to Qld starting with "the west" of the state

Thanks, Willy
AnswerID: 363352

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