Faulty BACKLIGHT and external adapter (?) - diyAudio
Go Back   Home > Forums > Design & Build > Parts

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 1st November 2005, 12:30 AM   #1
diyAudio Member
 
Join Date: Sep 2003
Location: Level Three
Default Faulty BACKLIGHT and external adapter (?)

Guys I have an LCD TV with faulty inverter or power supply. When I turn it on, cold cathode flourescent tubes are working for a second, and they goes dark.

I have tried to make work one of them (there are 8 flourescent tubes in backlit unit), via simple dual inverter (from case modification lamp) and 12V DC adapter, and I get success !

However, flourescent was working with half brightness. I mean inverter was probably feeding them with 24v instead of 12v.

Original inverter of the TV was this one;

http://www.darfon.com/2005_HTM/Power/Inverter_26LCD.htm

My question is:

Can I get work those 8 flourescent tubes via dual inverter and 24V DC adaptor ? I' m kind of unenlightened on electrics, so I need your advices.

THX in advance.

PS: There is no chance to repair it in my place... Only way is this way lol.
  Reply With Quote
Old 1st November 2005, 02:42 AM   #2
Stocker is offline Stocker  United States
diyAudio Member
 
Join Date: Dec 2003
Location: Austin
The lamps themselves will be running off several hundred volts, which is why you need the inverter.

If you can power all the lamps with individual inverters
and you don't mind the things hanging out the side (keep the wires short on the high voltage side! )
then go for it.
__________________
Jesus loves you.
  Reply With Quote
Old 1st November 2005, 04:12 AM   #3
karma is offline karma  Canada
diyAudio Member
 
karma's Avatar
 
Join Date: Feb 2003
Location: hamilton,ontario
i have tryed it in the past, save yourself the pain and order the right inverter for that model
  Reply With Quote
Old 1st November 2005, 11:53 AM   #4
diyAudio Member
 
Join Date: Sep 2003
Location: Level Three
Firs of all thx for the replies.

Quote:
Originally posted by Stocker
The lamps themselves will be running off several hundred volts, which is why you need the inverter.

If you can power all the lamps with individual inverters
and you don't mind the things hanging out the side (keep the wires short on the high voltage side! )
then go for it.

I can power two lamps with one case modification lamp inverter. Which was this one;

http://www.spirecoolers.com/acc.asp?ProdID=27

Actually I changed my idea because of poor voltage output of this inverter. I mean, I need to learn about voltage output value of original (Darfon) inverter. Then I should find an inverter (from case mod products) that gives same voltage output with original one.

Do you have an idea about original inverter's voltage output ? I emailed manufacturer but they have not replied me... And there is no detailed information (in website of Darfon) about their inverter products.


Quote:
Originally posted by karma
i have tryed it in the past, save yourself the pain and order the right inverter for that model
Emailed the manufacturer, but I think they will not respond me. So I don't have a choice.
  Reply With Quote
Old 1st November 2005, 12:55 PM   #5
diyAudio Member
 
Join Date: Sep 2003
Location: Level Three
I have another question; if I use a 24V adapter instead of 12V, will inverter or flourescent blow up ?

Original input was 12V for the inverter (Spire dual inverter for case mod)...
  Reply With Quote
Old 3rd November 2005, 06:49 AM   #6
Stocker is offline Stocker  United States
diyAudio Member
 
Join Date: Dec 2003
Location: Austin
a 24V-input inverter will either not work at all or not put out the rated voltage (probably will be much lower) if fed 12V. If you feed it 24V, the output will be whatever it should be. If it is enough to strike and maintain the light in the lamp, it should work.
__________________
Jesus loves you.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
denom pma250 amp faulty,but no faulty parts found please help homertooties Solid State 1 7th December 2008 04:58 PM
external aerial adapter for GSM ( N3310 etc) Koy Everything Else 1 23rd August 2003 11:49 AM


New To Site? Need Help?

All times are GMT. The time now is 01:30 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2