онлайн ремонт ТВ-ремонтируем сообща -вместе)))

[Yura717]

мултиметер у тебя есть ?

[Yura717]

Делал и дажЕ нюхал.Каких либо подозрительных моментов замечено не было,как на тактильность так и на обоняние))пойду искать где они там это штампуют))

Dong Yang ? но я не вижу модель ...... разрешение фото не дает возможность прочитать надпись
а свиста от блока питания нет?

[XCNY]

Блок питания :
DONG YANG
BN44-00338B
MODEL: P2632HD_ADY
УФФФ..

[Yura717]

Hi all, I want to share this info and save peeps some money into the bargain.T The other night I came home to a dead tele. My Samsung 40" LCD had decided to give up the ghost and refused to power up. It was sitting there audibly chirping away to itself every couple of seconds or so.I did some trawling on the net and apparently this is quite common on Samsungs and is relatively simple to repair. I took the back off the unit to reveal a lot less than I was expecting really but in the centre panel was the power supply board. It had x4 plugs feeding other boards and a couple of what were obviously mains inputs. I removed these plugs and removed the x6 securing screws that held it to the chassis. There are a few elecrolytic capacitors on the board that stand vertically from the board. They tend to have a silver top with a cross in the centre running from edge to edge. They also have a line running from top to bottom with a negative symbol inside it to help you identify them. The silver top with the cross should be perfectly flat if it is slightly raised or bulging it is dead or very close to it. This is the probable cause of the fault. I found x2 capacitors with this problem. They were 1000 microfarad rated at 25V near the top RHS of the board. A quick visit to Maplins enabled me to get hold of x2 1000 microfarad caps at 35V (as long as the value is the same then the voltage is not really an issue). I desoldered the old caps from the board noting where the negative symbol was located beforehand. If you don't do this and solder the replacement in arse about face it will not be pretty and you will definitely know you have screwed up. After soldering in the replacements and cutting off the excess on the cap legs I remounted the board onto the chassis, connected up all of the plugs removed previously and powered the unit up. Wayhey the good old white noise screen appeared. This was good enough for me. I rebuilt the unit completely plugged everything back in on the rear and it worked a treat. Cost to me £1.60 for the caps and the cost of getting to the other side of town to Maplins. If you are not experienced in handling soldering irons etc. or have never tackled any kind of repair yourself then it might be an idea to find someone else to do this for you because it does have an element of danger for the complete novice and I don't want someone to torch their house because they put the iron down on the side of the couch etc. Remember to note which way the capacitors are fitted before removing them and ensure the replacements go in the same way round. You have been warned. If anyone finds anything amiss with this or has any suggestions then please amend the link. Be safe.

[XCNY]

Dong Yang ? но я не вижу модель ...... разрешение фото не дает возможность прочитать надпись
а свиста от блока питания нет?

Все тихо как в подводной лодке.Мне так чет думаеться должна быть ище панель сенсорноного управления.Пойдука я пороюсь-покурочю железо ,Чет как то ато структурно чет не хватает.

[Yura717]

http://arizanotlari.com/Semalar/Tv/l...0338b-sema.pdf
посмотри если эта схема совпадает с твоей

[Yura717]

QB851
LMBT2222ALTIG
думаю сигнал на включения Power supply идет через транзистор QB851 на 1 стр /правоя сторона/
питание оптрона /LED part/ вых 2 сажается на землю ...

[XCNY]

Схема эта.Но ище может быть сенсорный элемент ,как он там маркирован?плинь через телефон ,херово схему рассматривать.((

[Yura717]

читай выше я написал как идет вкл блока
схему можно увелить pdf reader'e

[XCNY]

Ну вот и все локализация дефекта определена ,терь тока нада провести замену одной из двух радиодеталей и ТВ будет пахать.Спасибо Юра за участие))Коллективный разум работает ,однако)):115