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Subject Topic: 12v Tv Post Reply Post New Topic
PersonPedro-Pete
29/1/2014 at 3:38pm
 Location: North Wales
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Hi All
Just bought 12v tv, plugged it in but it wont switch on (tv light on and it tries to switch on but then turns back to standby)
I am also using 12v stabaliser between socket and tv
Checked 12v socket and it was showing 13.50
Checked battery that showing same
Plugged van into house with the ehu
Tried again and tv works fine (atill in 12v socket)
Where am I going wrong, Help please
Thanks


PersonFrancophile1947
29/1/2014 at 4:36pm
 Location: Norwich
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Check the voltage at the end of the lead that plugs into the TV - maybe the stabiliser is faulty.

-------------
Cheers
John


PersonPedro-Pete
29/1/2014 at 4:52pm
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Hi John
12.50 at end of lead
Pete


Personjayc001
29/1/2014 at 5:40pm
 Location: Essex
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Voltage is too low when under load. Probably the voltage regulator at fault or possibly it's not rated high enough.

On an older van it could be the 12V power sockets and supplying wiring is slightly corroded causing a voltage drop.


PersonPedro-Pete
29/1/2014 at 5:57pm
 Location: North Wales
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Ok, Just done some more checks
Battery fully charged
Voltmeter on the 12v board in orange(not zig but similar looking)
I only have to put small light on and it goes into red on volt meter
So seems to be voltage drop but how can I remedy it
Do I first check all wires going to fuse box and make sure they all have good connection
If no joy with that can I wire one 12v socket direct to the load outlet of solar charge controller(with inline fuse)
Thanks


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Personjayc001
29/1/2014 at 7:59pm
 Location: Essex
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Have you got a volt/mulimeter? You need to measure the voltage directly at the battery when under load to see if it's a battery fault or wiring issue.


PersonPedro-Pete
29/1/2014 at 8:03pm
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yes have multimeter, so switch on all lights and measure at battery ?


Personjayc001
29/1/2014 at 8:20pm
 Location: Essex
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Yes. If the battery is on it's last legs then the voltage drop will be evident. If it doesn't drop more than 0.1-0.2v and then the drop must be on the wiring somewhere.

For reference a fully charged battery should be in excess of 12.6v. Below that and it's not fully charged. If you're only getting 12v then that suggests it's only circa 25% charged.


PersonPedro-Pete
30/1/2014 at 10:37am
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Hi
No load was 12.87
With 3 lights on 12.70
So i guess its somewhere in wiring
I use the quick clamps on battery posts, could this be part of problem?
Thanks


Personjayc001
30/1/2014 at 7:41pm
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Maybe they are corroded. Give them a clean. Also check all the 12v fuses. Mine had a fair bit of oxidation causing some strange problems.

I cleaned them with switch cleaner and a brillo pad.


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PersonPedro-Pete
31/1/2014 at 5:04pm
 Location: North Wales
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Ok , Just an update for all.
Cleaned all all 12v fuses and connections with contact cleaner and hey presto tv now working, never knew something as simple as that could cause so many problems,so not only is it fixed but I have learnt something too.Thanks to all who contributed
Peter


Personjayc001
31/1/2014 at 5:51pm
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Result.


Personmichael
02/2/2014 at 3:14am
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well done good result

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the only silly question is the one you do not ask.



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