12v tv connection

Submitted: Friday, Feb 29, 2008 at 12:35
ThreadID: 55036 Views:8431 Replies:6 FollowUps:6
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Hi all, this question may have already been addressed but I have been unable to find anything directly answering it.
We have just bought a Palsonic 12v/240v LCD TV/DVD 19" to be used at home, in the caravan and occasionally the boat. We were told there was a special cable for connecting to the 12v battery system directly - but the shop didn't have that cable and suggetsed Dick Smiths or Jeycars.
My question is this: should this be a straight connection to the 12v system or should there be something (a regulator?) which ensures a steady 12v supply (given that a fully charged battery may supply more than 12v).
If I need more than just a cable (and fused connector) what and where might I buy this item?
Thank you.
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Reply By: Nomadic Navara - Friday, Feb 29, 2008 at 13:06

Friday, Feb 29, 2008 at 13:06
Nothing special in the lead, just twin cable and two plugs. You can get the bits from DSE and construct your own if Jaycar or DES do not have ready made ones. Just be careful of polarity the TV may not have any protection built in. Also there are a few sizes of the type of plug that connects to the TV so take it along to get the right size

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AnswerID: 290022

Reply By: Notso - Friday, Feb 29, 2008 at 15:54

Friday, Feb 29, 2008 at 15:54
I've been running mine off either the vans 12 volt power supply when hooked to 240 volt, or the 12 volt battery when off power and have no problems. It connects through a standard Cigarette lighter socket.

AnswerID: 290055

Reply By: Mike Harding - Friday, Feb 29, 2008 at 16:01

Friday, Feb 29, 2008 at 16:01
I would exercise a little caution.

A quick Google indicates this TV is a native 12V device which uses a 240VAC to 12VDC plug pack and Palsonic specify a specific optional part (DC1720 or something like that?) for direct operation from 12V.

There is no simple way of knowing how effective the power supply within the TV is at reject spikes and other electrical nasties and it may well be the DC1720 has noise suppression components built into it - indeed it may even be an independent switched mode power supply. otoh it may simply be a piece of cable and a couple of plugs?

If you choose to make your own cable I _strongly_ suggest that when the TV is plugged into a 12V system (NB. not turned on merely plugged into) you do not start or stop the engine or switch on or off any items which use significant current ie. central locking, lights etc.

Having spent that much on the TV I suggest you buy the Palsonic 12V unit and read the instructions which accompany it.

Mike Harding
AnswerID: 290057

Reply By: Derek from Affordable Batteries & Radiators - Friday, Feb 29, 2008 at 19:18

Friday, Feb 29, 2008 at 19:18
I would be careful as already suggested.

I had a customer last week who had a problem when his caravan DC voltage exceeded 13.6V the TV would switch off. It had some kind of auto shut down. I don't know if your Palsonic has this. I sold the customer our DC to DC converter that keeps the voltage to 12.2V continuous.

Regards

Derek.
AnswerID: 290088

Follow Up By: Mike Harding - Friday, Feb 29, 2008 at 19:41

Friday, Feb 29, 2008 at 19:41
Love you Derek :)
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FollowupID: 555404

Follow Up By: Mike Harding - Friday, Feb 29, 2008 at 19:47

Friday, Feb 29, 2008 at 19:47
As much as I enjoy Derek's continual attempts to sell his products on this forum I seriously doubt Palsonic will accept his gear as being acceptable under their warranty.

Having paid x hundreds of dollars for this thing spend the extra bit on their guaranteed power supply.

Mike Harding
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FollowupID: 555405

Follow Up By: Derek from Affordable Batteries & Radiators - Friday, Feb 29, 2008 at 22:15

Friday, Feb 29, 2008 at 22:15
or..

While you are at DSE just by an inverter. (or Jaycar, Battery World, Bainbridge, BCF)

:-)

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FollowupID: 555452

Follow Up By: jamas - Saturday, Mar 01, 2008 at 09:04

Saturday, Mar 01, 2008 at 09:04
I already have an inverter - I thought it more economical to run a 12v tv on a 12v supply.
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FollowupID: 555518

Follow Up By: Mike Harding - Saturday, Mar 01, 2008 at 09:36

Saturday, Mar 01, 2008 at 09:36
Derek's suggestion re the inverter is a good one. You are correct that the inverter will waste some power by its internal losses but given your TV is speced at 5A the bit the inverter looses won't make much difference.

Mike Harding
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FollowupID: 555523

Reply By: Member - Graham H (QLD) - Saturday, Mar 01, 2008 at 08:15

Saturday, Mar 01, 2008 at 08:15
I have a similar TV and bought a Telefunken 12v-12v little box Regulator???? which will run two items off it It was only about $30 on Ebay and seems to keep things running OK

Model Number TDC12 12volt 5 amp
The TV is a Centrex which is basically a rebadged Telefunken or vice versa
AnswerID: 290179

Follow Up By: jamas - Saturday, Mar 01, 2008 at 09:00

Saturday, Mar 01, 2008 at 09:00
I see there's something on ebay at present - there's another option - thank you :-)
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FollowupID: 555517

Reply By: jamas - Saturday, Mar 01, 2008 at 08:20

Saturday, Mar 01, 2008 at 08:20
Many thanks to all for your response and advice. I think you're all probably correct, but as Mike pointed out - it might be better not to risk it. I have phoned the TV Supplier and asked them to order the special cable they didn't have in stock. If that fails then I might check out what Derek has sugested.

I checked the Palsonic site and saw their rrp of $900+ for the tv/dvd - I'm guessing that's what Mike was referring to (not sure) but we paid $580 - still a lot - but it has a 3 year warranty so we're satisfied with that.
Thank you all :-)
AnswerID: 290182

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