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Straipsnių hierarchija
Monitoriaus BenQ taisymas

Pakliuvo į rankas neveikiantis Benq monitorius, teko pirmą kartą ardyti LCD monitorių.

Gerai, kad rodė šiokį tokį gyvybės ženklą - paspaudus įjungimo migtuką užsidegdavo šviestukas aplink jungiklį. Tai reiškia vieną, kad tikriausiai monitoriaus maitinimo blokas bus nesugedės, bet ekranas visai nereagavo.

Tai pirmas žingsnis buvo patikrinti maitinimo šaltinį, pasirodo kad visos įtampos yra. Tada lieka trys variantai kodėl neveikia:

1) Kažkas su duomenų valdymu;
2) Sudegusios pašvietimo lempos;
3) Neveikia pašvietimo lempų įtampos keitiklis.

Duomenų valdymo bloką vargą ar pavyks patikrinti neturint specialio įrangos, todėl net nebandžiau.
Tada patikrinau ar ateina įtampa iki įtampos keitiklio, neateina. Tada suradau sudegusi saugiklį. Tada patikrinės įtampos keitiklio tranzistorius suradau, kad kiekviename kanale sudege po vieną... Tada pasidarė viskas aišku.

>


Šis plastikas, paskirsto šviesa po visa plotą.



Toks plonytis...



Pagaliau, dasikasiau iki LCD kristalo, kaip matome, LCD veikia, tik pašvietimo nera.


Tai CCFL vamzdis, kuris apšvieė?ia iš vidaus visą LCD ekraną.



Naujos detales.
Tranzistorius SC5707


Saugiklis


Å ia plokštė, kurioje blogos detalės.


Pakeisti sudege tranzistoriai


Pakeistas 3A saugiklis.


Viso darbo rezultatas, pradėjo šviesti LCD pašvietimo lempos.



Schemos/Service guide (2,2MB)
Komentarai
#1 | rychka · February 10 2011 05:34:56
geras FAQ 10 balų
#2 | vaclovas · August 02 2011 19:14:37
Puikiai pateikta medžiaga-labai ačiūSad
#3 | Edga · March 17 2012 16:57:25
Na, man buvo panaši problema su SAMSUNG LCD monitoriumi (tingiu žiūrėt modelį, bet ne esmė tame). Draugas atidavė neveikiantį monitorių, kurį ketino išmesti, nes manė, kad jis jau nebepataisomas, nors niekur nevežė apžiūrėt. žodžiu, paspaudus įjungimo mygtukąlemputė sužibėdavo ir užgesdavo, ekranas tuo tarpu nėkiek nenušvisdavo. Pagal draugo pasakojimus buvau susidaręs įspūdį, kad čia LCD apšvietimas, bet ta užgėstanti PWR lemputė bylojo jog kaltas gali būti maitinimas. Tad nieko nelaukęs išsiardžiau monitorių, ir išėmęs maitinimo schemą pamačiau išsipūtus? 25V 1000mkF kondensatorių. Išlitavau jį, o pasiknaisiojęs po stalčius susiradau analogišką kondensatorių ir prilitavau. Rezultatas - monitorius veikia iki šiol ir taip jau pusę metų Smile
#4 | praeivis · January 29 2013 13:02:24
labai sauniai parasyta. man tokia pat beda buvo. isgelbejo dar viena lcd gyvybe deka to Grin aciu autoriui uz straipsni
#5 | Vardas · March 20 2013 20:40:37
Aha... Puikiai aprasyta, AS pakeiciau 3 kondensatorius. Bet vistiek problema neissisprende.. Prie tranzistoriu yra kitoje puseje plokstes parudavimas. Tai gal del to dar beda? Pas mane dar net nedega POWER lempute. Nors srove ateina i lempute. Monitorius maitinamas 12v.
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