Re: LG e2240s no power
ok sir, i will do that later when i get to the shop, belated valentine's day to everyone, hope everyone got l*id last night haha=) kidding
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Re: LG e2240s no power
Hello Sir Selldoor, thank you very much for your hardwork...
mine was not bought here locally, so warranty does not apply,
weird thing is i do not know about the part, online and into other component sites=(
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Re: LG e2240s no power
and no one sells the same logic board=(
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Re: LG e2240s no power
hello sir, ty for very fast reply
that is the problem don't really exactly know if they are regulators or mosfets due to no avail data sheet
but they are shorted, and they get really really hot when plugged in
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LG e2240s no power
Good day everyone
I have a weird one here hope you guys can help=)
I have an LG e2240s
It has two mosfet that is busted shorted, but i can't seem to find its data sheet to find its appropriate replacement. on the part it says:
AJZ 951
AKD 007
Can anyone help?
Tried looking for a board but to no available can be found. 715G3894-M02-000-004L
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Re: AOC LM725 screen goes blank
update the lcd is still working for more than a week now=)
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Re: AOC LM725 screen goes blank
Update:
i have installed the c5706 transistor and resoldered again the transformers and now the lcd is working fine for 2 hours
total parts replaced:
2 x 16v 470uf electrolytic capacitors
2 x 16v 1000uf electrolytic capacitors
2 x 25v 150uf electrolytic capacitors
1 x 50v 4.7uf electrolytic capacitors
2 x c5706 transistor
all thanks to the following badcaps forum members lcd specialist
[b]ratdude747[/b]
[b]eguevarae[/b]
[b]freelander[/b]
...
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Re: AOC LM725 screen goes blank
updates:
here was the picture when i removed the 4 c5706 transistor which was taught by [b]Bobdee[/b]
now i was able to get the c5706 from our local supplier, will install it tonight when i get home, hehe=)Re: AOC LM725 screen goes blank
updates:
here was the picture when i removed the 4 c5706 transistor which was taught by [b]Bobdee[/b]
now i was able to get the c5706 from our local supplier, will install it tonight when i get
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Re: AOC LM725 screen goes blank
oic thank you guys for specifying sorry for being so stupid hehe=)
here are the pics where i tested the cfl
all cfl are okay=)...
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Re: AOC LM725 screen goes blank
@eguevarae
which tube are you referring to?
a local shop here says that they have 5706 but they can't find it they will try to call me tomorrow and see if they can find where they kept it=)
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Re: AOC LM725 screen goes blank
@freelander
ive done that dude, four of the bulbs are working great=) tested each with plainbill's ccfl mod kit trick=) thannxxx=)
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Re: AOC LM725 screen goes blank
alrighty boss, but probably will be able to buy the transistors on monday since our local electronic stores are closed on sundays
i will post tomorrow all the pictures i have taken during the testings
i'll check the board on my microscopes so no cold joint can escape, hehehe=)
thank you thank you, hope this will solve my problem (fingers crossed)
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Re: AOC LM725 screen goes blank
@plainbill
done testing all bulbs with cfl mod kit all ok
here is the schematic you are requesting this is the service manual for lm729 but the inverter board for this model is exactly the same with lm725
download link
@bobdee
alright boss done removing the four transistor
tested pins = 1+2 1+3 2+3
the three transistors same no reading nbut the forth one has a short on pin 1 + 3 do i have to replace it?
the transistor label is C5706 and...
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Re: AOC LM725 screen goes blank
@ratdude
i did check for cold joints and almost had neck injury cause i just checked all continuity, hehe
they may be pain in the neck but with so much people here helping me even detailing me on what i should do, makes me even more driven to fix this thing so i could give my share on this experience here in this forum=) (i think tears are starting to flow now, haha)
thanxxx
@bobdee
woah alright! i'll try doing all of those instructions will log and post here all test that i have...Last edited by kharr; 09-10-2009, 07:53 PM.
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Re: AOC LM725 screen goes blank
now i havent tried all the cfl ok will try each of them, and will try to get a schematic if i can, thanxxx...
and i'll be back=) hehe
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Re: AOC LM725 screen goes blank
should i replace these two? A9741F controller and 9435P ?
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Re: AOC LM725 screen goes blank
ok sir so BA9741F is controller and 9435P drives the transformer, what should i do next?
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Re: AOC LM725 screen goes blank
by the way i tested the transformers pins there were no short
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Re: AOC LM725 screen goes blank
hopefully we can solve it thanks for being so patient, and i am learning alot from this
here are the values you requested
problem by using the inverters from backlight kits you have to drive them from 12v source and i will be needing two of them if that happens, right?...
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