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#81 | |
New Member
Join Date: Oct 2017
City & State: Tijeras
My Country: United States
I'm a: Knowledge Seeker
Posts: 14
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![]() Quote:
I know my video board needs caps, and my psu is probably still OK although should get news caps for the heck of it anyway, but I don't know if the inverter is OK or not. I don't even know how to remove the CCFL's. I was thinking about testing them on one of my Inverters I have for custom PC use, if that will work but I don't know. Either way I need to verify that the inverter and CCFL's are OK before I plan to fix anything else. Still in research mode for that task. |
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#82 |
Aspiring Expert
Join Date: Jun 2013
City & State: Montreal, Quebec
My Country: Canada
Line Voltage: 120VAC
I'm a: Knowledge Seeker
Posts: 460
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![]() Hey Budm,
I have a few of these lights, do you think I could use them without having to open them? They are sold at home depot for 4.97$ Tks! |
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#83 |
I see dead caps
Join Date: Oct 2007
City & State: Hiding inside a plated-through hole
My Country: New Zealand
Line Voltage: 230VAC 50Hz
I'm a: Hobbyist Tech
Posts: 4,652
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![]() You could use those directly, yes.
Just bear in mind that they may not last as long as they would when used with the correct inverter, I think the monitor inverters drive a higher voltage as their CCFL tubes are longer, so the test lamps may fail faster. That's what I experienced anyway - although I was using scavenged tubes from CFL lamps which may have been near their end of life already...
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"Tantalum for the brave, Solid Aluminium for the wise, Wet Electrolytic for the adventurous" -David VanHorn |
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#84 |
Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,050
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![]() Bad lamps and bad wiring.
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Never stop learning Basic LCD TV and Monitor troubleshooting guides. http://www.badcaps.net/forum/showthr...956#post305956 Voltage Regulator (LDO) testing: http://www.badcaps.net/forum/showthr...999#post300999 Inverter testing using old CFL: http://www.badcaps.net/forum/showthr...er+testing+cfl Tear down pictures : Hit the ">" Show Albums and stories" on the left side http://s807.photobucket.com/user/budm/library/ TV Factory reset codes listing: http://www.badcaps.net/forum/showthread.php?t=24809 |
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#85 |
Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,050
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![]() Bad lamps and bad wiring ii.
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#86 |
master hoarder
Join Date: May 2008
City & State: VA (NoVA)
My Country: U.S.A.
Line Voltage: 120 VAC, 60 Hz
I'm a: Hobbyist Tech
Posts: 9,995
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![]() ^^ OH MY.... ![]() ![]() ![]() ![]() ![]() ![]() How many thousands of LCD monitors have you fixed to collect all that? Gee. To think I already had second thoughts of doing a lamp replacement after I did my first, because I thought it was so "involved". My deepest respects and hat off to you sir! ![]() |
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#87 |
New Member
Join Date: Dec 2018
City & State: EGYPT
My Country: tanta
I'm a: Knowledge Seeker
Posts: 7
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![]() thanks a lot it is a useful idea....
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#88 |
New Member
Join Date: Dec 2018
City & State: chennai
My Country: india
I'm a: Knowledge Seeker
Posts: 4
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![]() Can I be able to use this technique in following picture, where there is only lead out from the master and slave as in the picture.
will there be any circuit or capacitors underneath? this is a old 32 inch , lg 32lh60yr. backiight sometimes stays on varying intervals,sometimes just flashes just for a second. and want to determine inverter or lamps that is bust. panel : lc320wud inverter board : LG 6632L-0548A thanks for the help |
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#89 | |
New Member
Join Date: Dec 2018
City & State: chennai
My Country: india
I'm a: Knowledge Seeker
Posts: 4
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#90 | |
master hoarder
Join Date: May 2008
City & State: VA (NoVA)
My Country: U.S.A.
Line Voltage: 120 VAC, 60 Hz
I'm a: Hobbyist Tech
Posts: 9,995
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![]() Quote:
If it's the latter, I'm not sure if a regular CFL would be okay or not, as the voltage might be much higher. And if it's the former, then it becomes a question of where/what circuit the CFL should be grounded to. Thus, I think you might need to make a new thread on this, open up the LCD screen so that you can trace how the CCFLs are connected inside, and post pictures there. That should allows for a more definitive answer, I think... of course, unless someone has seen this before and can tell you for sure. ![]() |
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#91 |
I see dead caps
Join Date: Oct 2007
City & State: Hiding inside a plated-through hole
My Country: New Zealand
Line Voltage: 230VAC 50Hz
I'm a: Hobbyist Tech
Posts: 4,652
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![]() Perhaps if you trace out how the output windings of the transformers are connected it will give you some clues?
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#92 |
New Member
Join Date: Dec 2018
City & State: algiers
My Country: algeria
I'm a: Knowledge Seeker
Posts: 11
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![]() Many thanks
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#93 |
New Member
Join Date: Mar 2020
City & State: cambrai
My Country: france
I'm a: Knowledge Seeker
Posts: 8
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![]() Hello every body,
I m French so please excuse me for my not excellent english. I have an LCD TV Samsung LE37B530 with BN44-00301 Power Board and i have an issue with Backligh. The Bakligh always Blink, with or without connection to main board. I read and read again the post here but nothing. I try with a CFL and is lighting 5 second and stop but no Blinking Thanks for you help and KEEP AT HOME . Regards |
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#94 |
New Member
Join Date: Apr 2020
City & State: Congleton
My Country: United Kingdom
Line Voltage: 240v 50Hz
I'm a: Hobbyist Tech
Posts: 5
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![]() It could be that the CFL is drawing slightly less/more current than your backlight tubes would, hence it's still going into protection but taking slightly longer to do so? Just a guess but seems possible given the arrangement of the lamps in this set.
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