Service manuals, schematics, eproms for electrical technicians

LG RT-21FB35M-VX CHASSIS MC-049B.

TV - SERVICE MANUAL
Type: (DJVU)
Size
509.8 KB
Page
29
Category
TV
SERVICE MANUAL
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  • Also known:
    LG CHASSIS MC-049B. MC049B. RT 21 FB 35 MVX MC 049 B. 21FB35M VX 049B.
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  • See related repair forum topics below. May be help you to repair.
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Relevant TV forum topics:
LG OLED55CX3LA freezes and shuts down
Dear community,

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.

The solution so far is to restart it by the power button, or the power socket, within 10 seconds.

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

I have read about these issues on LG OLED, and most of the cases were caused by overheat of the main processor.
Also read about thermal paste. I have opened my TV and yes, thermal paste was hard as rock.

I have cleaned the processor carefully, and used profesional thermo paste, but that does not solve the problem, unfortunately.
Also, I have done hard reset, used latest firmware update, tried without HDMI inputs, but the problems still persist.

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

I was read that the main board can be used from different LG OLED TVs, and even can get a better processor, kinda upgrade.


Give me please your opinion and advice what is the best solution.
Thanks,
Kalin


 
LG 60PZ950 Plazma TV kép hiba

Sziasztok!

Kissé zöldfülű vagyok még a témában, viszont állítólag tanulékony.

Olyan problémám van, hogy a címben említett TV a következő hibát produkálja: Videó
Csatoltam pár képet is.

Ez gyakorlatilag a test pattern akarna lenni. Az összes feszültség (5V, Va, Vs, Vy, Vsc) kivéve a Vzb-t (Z-sus panelen).

Vzb névlegesen 110V, viszont csak ilyen 89-92V körüli és a kis trimmer potméterével sem tudom már feljebb vinni.

Az IGBT-ket, diódákat kiforrasztottam és kimértem. Nem zárlatosak, és elvileg nyitnak, zárnak.

Lehetséges elkó hiba? Vagy esetleg még valamit még tudok mérni-nézni?

Van oszcilloszkópom, ha kell.

Köszönöm a segítséget!

 

Lg 47LM669T elégette a hdmi kábelt
Üdv ,ha valaki ezt elmeséli nehezen hittem volna el , a tv és upc box közt elolvadt a hdmi kábel . Állítólag a box okozta a hibát és azt az upc kicserélte , de a tv sem működik azóta . Bekapcsoláskor nem világít a stbay led , a táp panelon a 24V ,12 V ,3.3V rendbe , egy sárga led 5-öt villog kis szünetekkel , amit ne tudom mit jelent, de main biztos halott . A kérdés , milyen box hiba okozhat ilyen durva kábel olvadást , mert ebből akár lakás tűz is keletkezhetett volna .
LG 42LE8500 (LD03E) jelszó reset
Üdvözlet Mindenkinek!


Javítottam egy fent nevezett LG TV-t. Sajnos le van zárva jelszóval, így nem tudom hangolni, megfelelően tesztelni.
Alap jelszavak nem működnek (0000, 1234).
Van lehetőség ezen az alaplapon valahogy törölni a jelszót?

Üdvözlettel:
Gábor
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