Service manuals, schematics, eproms for electrical technicians

LG CF-20,21S12,42EH CH MC-84D

TV - SERVICE MANUAL
Type: (PDF)
Size
4.0 MB
Page
28
Category
TV
SERVICE MANUAL
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  • Also known:
    LG CF-20 CH MC-84D CF20 21S12 42EH MC84D CF 20 21 12 42 EH MC 84 84D
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  • See related repair forum topics below. May be help you to repair.
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Relevant TV forum topics:
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Sziasztok, 

A tárgyban említett tv villám vert. Kép nincs hang van.
Szétszedve sehol nem találtam vizuálisan elváltozást.
A tv volt már javítva.Az YSUSon a 20LC30as diódák cserélve voltak.
Ki lehet szűrni melyik boardon van a hiba?
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Please help me solving my issue with my LG OLED55CX3LA TV.

I have this TV since 3 years, never had an issue, until last month, when It suddenly start to freeze. It stuck on white/ or in currently displayed picture, got some pitching noise, and 5-6 seconds later the TV shuts off by itself.

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The problem occurs very rarely, sometimes early morning, sometimes 2 days without problems. I have played some HDR videos continuously, with no problems.

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As the problem is not coming very often, I am in research of the correct solution.

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Sziasztok, az a gondom ezzel a készülékkel hogy teljesen kiszámíthatatlan időközönként kikapcsolgat st-byba. utána rögtön újraindítható távkapcsolóval. Amikor megy, geometria meg minden egyéb teljesen rendben. Kontakthibák kizárva 1. átforrasztgattam az egész alaplapot 2. mozgatásra a legkisebb mértékben sem reagál. Kórelőzmény: évekkel ezelőtt ezt csinálta, akkor a sor kicsatoló kondi forrasztása meglazult. Akkor átforrasztgattam, hiba gyógyult. Most azokat is kicseréltem, és a 10nF kondit is a sorvég collectorán. Később volt egy olyan hiba, hogy nehezen indult, ez elektrolitkondi cserékre gyógyult. Egyszer valamiért a sortranyó is tönkrement, 2SC5411-et tettem be, ez elvileg jó oda, nem melegszik abnormális mértékben. Most tanácstalan vagyok. Lécci segítsetek ha valakinek volt már hasonló. Köszi. Tamás
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