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The lcd/led tv backlights are 3 volts each,so I wanted to know if you can use a 9 volt battery to test three of them at one time?

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6ya6ya
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Posted on Jan 02, 2017

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MrRobertLee
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SOURCE: 24 volt charging problems .2

A 12 volt battery is actually 13.2 volts fully charged. If you are reading 16 volts, you are probably getting extranious voltage from the system somewhere, especially if the vehicle is running when you check the voltage. The alternator will put out about 15-18 volts to charge the battery normally, and yours may put out 28-32 volts to charge them in series, but the batteries, when disconnected, should never read more than about 13.2 volts each. Typically, it will read about 12 1/2 volts when disconnected. COMPLETELY DISCONNECT BOTH OF THE BATTERIES. If you still read 16 volts when it is disconnected, you must have a bad meter because the battery can't produce that much voltage, no matter what. (Six 2.2 volt cells connected in series inside the case.) Put the meter on a known good battery on another car that is not running and see if you get the same reading. It sounds like the other battery is almost dead, regardless, and it sounds like your series/parallel switch may be malfunctioning. (That is the switch that puts the battery in series to run the 24 volt starter, then puts the batteries in parallel to run the remainder of the vehicle on 12 volts. This is all assuming that you have a diesel vehicle with a 24 volt starter and that is why you have two batteries.

Posted on Aug 19, 2008

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SOURCE: No Start. OBDii Code P2305.

i have the same problem could someone please help ? its getting cold outside and i live 30 miles from my job.

Posted on Oct 27, 2008

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SOURCE: Low voltage output from inverter

I am thinking this a high impediance device problem and this is normal operation - the user manual of my inverter warns about use with high impediance devices - if not I am interested also...

Posted on Mar 03, 2009

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SOURCE: will umc tv run on 12 volt battery?

yes you can plug this set straight onto a twelve volt battery it is designed for that purpose ie the motor home and campervan market ,i own one of these sets ,it is the best portable tvdvd ive seen so far ,hope this helps your query.

Posted on Jul 15, 2009

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SOURCE: need to replace the 9 volt battery in my kenmore freezer chest.

The manual does not tell you where its at but the 9-volt battery holder is located on the lower left side of the freezer. There is a small panel about 9" off the floor and towards the front of the freezer (left side facing). cd6fa25d-9930-4b53-8883-c0ebcde8413d1.03.01

Posted on Sep 12, 2010

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Lights flash then powers down.


Before read this, keep in mind that this is not your model and parts are not the same. This is just to let you know the steps to take. Sorry don't have the schematic for your set, but maybe this will help in checking. I'm Ex-Army myself and Veteran of OIF and OEF.::::1. (Lamp may light and go out) suspect bad lamp part # 915P020010 2. Check for 12-volts DC at J-9 connector pin 4 on the Engine Driver PCB, if missing check for an open F9A09 on the Power PCB, if it is open replace F9A09 part # 283P127060 and the Light Engine part # 939P977010 3. (Lamp may light and go out) Check for 5-volts DC at J-9 connector pin 1 and 2 on the Engine Driver PCB if low or missing check C9A37 and C9A38 both 3300 UFD 10 V on the Power PCB (part # 930B921002) 4. At power on the lamp turns on and off three times and then the unit shuts down with a red lamp LED (lamp error). Replace the Light Engine part # 939P977010 5. Lamp enable line at J14 pin 6 does not switch to 5 volts after turn on, 12 and 5 volt supplies are good. Suspect the Light Engine part # 939P977010 6. Lamp enable line at connector J14 pin 6 on the Engine Driver PCB switches to 5 volts after turn on and does go to 0-volts (low) after 5 seconds, 12 and 5 volt supplies are good. Suspect the Lamp Power PCB (ballast) part # 939P978010 7. Lamp enable line at connector J14 pin 6 on the Engine Driver PCB switches to 5 volts after turn on but does not go back to 0-volts (low) after 5 seconds, 12 and 5 volt supplies are good. Suspect the Light Engine part # 939P977010

Aug 25, 2007 | RCA HD50LPW175 50" HDTV

1 Answer

Can you use one 9 volt battery to test 3 lcd/led backlights at a time,instead of two double A batteries?


Two AA batteries are 3 volts (1.5v per battery). A 9 v battery is 9 volts. You are going to burn out your LED lights.

Semper Fi,
Z

Apr 27, 2017 | Computers & Internet

3 Answers

Hisense 50h5g model the backlights are blinking the pictures is really dark but sound quality is still good what may be the issue


Perhaps the backlight LED driver board needs to re-seated.
Also check flex wire connectors for loose connection.
reseat or replace

Aug 16, 2016 | Hisense Televison & Video

1 Answer

Bn44-00666a led voltages


If you wish to get some details; check the site linked here. Pull up older posts.
http://electro-medical.blogspot.com/
http://electronicshelponline.blogspot.com/

Apr 12, 2016 | Samsung Televison & Video

1 Answer

LED TV - replaced power board but still no backlight? LED backlights do not seem to work.


yes the led backlight for whatever reason is not functioning and that is the root cause of your problem. Unfortunately to find a replacement led backlight is tough as the backlight is normally fixed with the lcd panel and has to match the voltage and all that stuff with motherboard. and if that doesn't match you might short the tv itself. this case is as good as getting a replacement lcd panel.

Feb 17, 2016 | Seiki SE50FY10 50-Inch 1080p 60Hz LED HDTV...

1 Answer

There is sound but no picture. No backlights but can see a picture in dark with flashlight test. LED panel # is D460D3-6Y43-COX. What part would I need to purchase? T


You have check the power supply first .To know how to check the power supply watch the following video. Normally led tvs power supply contains the led drive circuit too. Bot are integrated in the same board. The led drives circuit should have between 30 to 120 volts from the power section depending up on the brand and model number of the TV. If the the voltage is ok then you have problem with the Led driver section section. Either you can try to repair it or can buy a new power board.
www.electro-medical.blogspot.com


Testing LCD TV Power Supply BoardsSTEP BY STEP

Oct 31, 2015 | SEIKI Digital SE46FY10 46" LED TV...

2 Answers

How do I properly determine the power supply of a parallel circuit of LED lights? I have 30 LEDS to wire into a large model. I know the individual LEDS each run on a 3 Volt CR2016 watch battery. I


You can go from 2 aaa'a three two D's depending on how long you want the battery's to last or project size. Depending on LED model 98% don't matter on the amps just the voltage. I was using 2 D's so you would have about 24 - 36 hour straight on time.. But if you could afford 4 of them for testing. Run four in line so the voltage will be 12 volts total and hook it up to your car battery and you should/would have a light for 6 months to a year and the LEDS should be just fine.

Sep 18, 2014 | Cars & Trucks

1 Answer

LG shows it will lose display in 3 seconds


hi the tv has detected a fault with the back lighting, now it could be a problem with the voltage to the back light or some of the leds in the back light have failed, it will turn off the back light when it finds a fault. behind the screen there is rows of leds on strips and they all light up when the screen is in use. and the main board knows they are lighting up by the voltage its using. when to many leds go out the voltage is too high so it will turn the back lights off to save them. also the same if the power board is not supplying the right volts. say the volts need to light the back screen is 64 volts and its only giving 62 volts the power is not right so it shuts down. same for if the volts go up to 64.5 volts it will do the same. hope this helps you under stand.

Jun 11, 2017 | LG 47 47LV5500 47 LCD TV

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