Hi All, First time post . Searched the forum on this topic but havent found a solution...So wondering if any one can provide advice.
Purchased RV Media 19in Evolution TV from Camec which has Low Voltage Function
Despite all my efforts as follows
1/dedicated 12 volt heavy cage cable direct to battery
2/dedicated 12 volt 10 amp cig outlet
3/testing on brand new isolated lithium battery with built in voltmetre
This TV still displays the low voltage warning on the screen
I have contacted Camec several times and must say I'm very disappointed at the lack of after sales service and technical support.
I'm loathed to send the TV back to them due to this poor service.
Any one out there ideas or have I purchased an expensive faulty unit......Cheers all
Dicko1 said
08:10 AM Jul 28, 2021
Dont muck about. Send it back. Ring them and tell them exactly why you are sending it back...also email with all the info....let them sort it out. Muck around too much with it and they,ll find some excuse to say its your fault!
divesight said
08:39 AM Jul 28, 2021
Thanks for advice....I'm sick of "mucking" about with this company..If this is the only solution I'll take it to local TV electronics expert
Just thought other users may have had the same problem Cheers Have a good one
valiant81 said
02:38 PM Jul 28, 2021
Hi; There may be nothing wrong with your television. What you have not told us is what the voltage is at the battery terminals and what is the voltage at the television. The current draw of the television would be handy as well. Do not rely on the so called voltmeter on the battery case/ box, you need a proper multimeter to measure the voltage!!! You could have a voltage drop issue some were and causing all of your greef.
Is your battery fully charged and just because you battery may show a battery that is above a certain voltage ( 13.7 + volts is good ) and again measured with a good multimeter does not mean the battery is fully charged. But yes you could have a low voltage detect circuit in the television fault , but please do a little homework first and find out what the voltages are before you contact the manufacturer.
divesight said
06:06 PM Jul 28, 2021
Thanks for advice.....Battery voltage (2x 120 full river 1 year old) 13.4 via multimeter... battery voltage at 10 amp cig plug 13.4 battery voltage via bmp mamagement system 13.4
TV is connected to batteries direct. The TV turns on and within 5 minutes or so displays LV warning and continues this warning... no other load on system.
Thanks Im now almost convinced its the TV cheers
Aus-Kiwi said
09:37 AM Jul 29, 2021
Will it do the same with another battery ? Temp wired ?? Could be a resistance or choke in the wiring ?
valiant81 said
10:55 AM Jul 29, 2021
Hi; Yes it does sound like a tv fault and the reason why i asked for what the voltages are is that the service centre will ask the same questions.
One thing i would ask is what type of wire is used from the battery to your cigarette lighter socket. You could have a problem with the wire being under size wire and causing voltage drop. using a meter would not necessary show this problem up unless you were able to measure the voltage at the back of the tv with the set running as this would be the correct way to measure the voltage and see what that voltage is and if there is a difference between that and the terminal voltage at the battery.
When i have installed 12 volt electronics over the years i have always used cable that is rated at around 22 Amps even if it is used for a light load and cable length and voltage drop start to come into play. A perfect example is these Chinese diesel heaters that we all put in to our caravans or sheds. Under size the wiring here and you are going to have issues with the diesel heater not wanting to start and blow white smoke out of the exhaust. Replacing the dc cable from the battery to the heater can make a big difference in the performance of the heater
divesight said
03:01 PM Jul 29, 2021
Regards both questions..... TV is wired to two 120 amp fullriver AGM in parallel, so drawing off two batteries...... Guage of wire 10mm2 or in old terms 10 guage tinned (recommended by auto elec)the run is 1.2 mtrs.....I have not determined whether the actual TV cord from the 10 amp cig to TV may be at fault.... Will test tonight Thanks for questions Cheers
Ian G said
07:15 PM Jul 29, 2021
There is a big difference between 10 gauge and 10 mm, though 10 gauge would be more than ample for a TV
Aus-Kiwi said
08:20 PM Jul 29, 2021
Never trust a cigarette lighter connection !! 10mm sq ? So many wire size types !
divesight said
08:14 AM Jul 30, 2021
Wire according to auto elec is capable of 50amp draw so is more than over kill....The Cig connection is heavy duty from a specialist 12 volt supplier at 10 amp draw it also has locking tabs... Television is now being checked by Rand Electronics...Which will give me peace of mind. They will be able to advise in due course....Thanks for all the advice. Cheers
kgarnett said
10:39 AM Jul 30, 2021
You need to measure the actual voltage at the input to the TV while the TV is on and drawing current.
Measuring the open-circuit voltage at the cig connection tells you nothing about the voltage at the TV under load.
Ken
Whenarewethere said
10:51 AM Jul 30, 2021
kgarnett wrote:
You need to measure the actual voltage at the input to the TV while the TV is on and drawing current. Measuring the open-circuit voltage at the cig connection tells you nothing about the voltage at the TV under load.
Ken
Agree.
divesight said
04:31 PM Jul 30, 2021
Will do Cheers
-- Edited by divesight on Friday 30th of July 2021 04:31:24 PM
Hi All, First time post . Searched the forum on this topic but havent found a solution...So wondering if any one can provide advice.
Purchased RV Media 19in Evolution TV from Camec which has Low Voltage Function
Despite all my efforts as follows
1/dedicated 12 volt heavy cage cable direct to battery
2/dedicated 12 volt 10 amp cig outlet
3/testing on brand new isolated lithium battery with built in voltmetre
This TV still displays the low voltage warning on the screen
I have contacted Camec several times and must say I'm very disappointed at the lack of after sales service and technical support.
I'm loathed to send the TV back to them due to this poor service.
Any one out there ideas or have I purchased an expensive faulty unit......Cheers all
Just thought other users may have had the same problem Cheers Have a good one
Hi; There may be nothing wrong with your television. What you have not told us is what the voltage is at the battery terminals and what is the voltage at the television. The current draw of the television would be handy as well. Do not rely on the so called voltmeter on the battery case/ box, you need a proper multimeter to measure the voltage!!! You could have a voltage drop issue some were and causing all of your greef.
Is your battery fully charged and just because you battery may show a battery that is above a certain voltage ( 13.7 + volts is good ) and again measured with a good multimeter does not mean the battery is fully charged. But yes you could have a low voltage detect circuit in the television fault , but please do a little homework first and find out what the voltages are before you contact the manufacturer.
TV is connected to batteries direct. The TV turns on and within 5 minutes or so displays LV warning and continues this warning... no other load on system.
Thanks Im now almost convinced its the TV cheers
Hi; Yes it does sound like a tv fault and the reason why i asked for what the voltages are is that the service centre will ask the same questions.
One thing i would ask is what type of wire is used from the battery to your cigarette lighter socket. You could have a problem with the wire being under size wire and causing voltage drop. using a meter would not necessary show this problem up unless you were able to measure the voltage at the back of the tv with the set running as this would be the correct way to measure the voltage and see what that voltage is and if there is a difference between that and the terminal voltage at the battery.
When i have installed 12 volt electronics over the years i have always used cable that is rated at around 22 Amps even if it is used for a light load and cable length and voltage drop start to come into play. A perfect example is these Chinese diesel heaters that we all put in to our caravans or sheds. Under size the wiring here and you are going to have issues with the diesel heater not wanting to start and blow white smoke out of the exhaust. Replacing the dc cable from the battery to the heater can make a big difference in the performance of the heater
Measuring the open-circuit voltage at the cig connection tells you nothing about the voltage at the TV under load.
Ken
Agree.
Will do Cheers
-- Edited by divesight on Friday 30th of July 2021 04:31:24 PM