Service manuals, schematics, eproms for electrical technicians
LG CB-20T20X SM
Type: 
(RAR)
(RAR)Size
3.5 MB
3.5 MB
Page
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Category
TV
SERVICE MANUAL
TV
SERVICE MANUAL
If you get stuck in repairing a defective appliance download this repair information for help. See below.
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Looking for similar lg manual?
Good luck to the repair!
Please do not offer the downloaded file for sell only use it for personal usage!
Looking for similar lg manual?
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- Also known:
LG CB-20T-20X CB20T20X CB 20 20T20X CB-20T20X
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Relevant TV forum topics:
i have a strange problem with my LG 55 led tv HDMI INPUTS.
when i connect the cable tv HDMI to the HDMI input of the lg led tv .the tv says NO SIGNAL .but if i connect to the same inputs a china tv box all is working fine. all the HDMI inputs are the same. non of them work with cable tv but work well with the china tv box.
this happens only on this specific tv another tv i have work fins with the cable tv and with the china tv box.
i cant figure way it happens in this tv only.
when i connect the cable tv HDMI to the HDMI input of the lg led tv .the tv says NO SIGNAL .but if i connect to the same inputs a china tv box all is working fine. all the HDMI inputs are the same. non of them work with cable tv but work well with the china tv box.
this happens only on this specific tv another tv i have work fins with the cable tv and with the china tv box.
i cant figure way it happens in this tv only.
thanks, to the helpers?
HELO mindenkinek segitseget kerek tolletek plazma tv javitasban van hang nincs kep az Y sus on volt egy nagy condi felrobbanva a VS tapon meg a bistositek elegve , kicsereltem elinditom a tv-t kisult az egyik AN xxxxx buffer chip azt csak kivettem es igy probaltam beinditani lenyegeben kellene mukodnie egy chikkal a kepernyon , vagy nem ?
van VS VA 5V 15V reagal a kepernyo ha piszkalon bealitasokat az Y SUS on es Z-n is
Eszrevetelek nem mindegyik MOSfet blokkok melegsenek be az Y-en 5 hutobordabol csak 3 mekegszik a Z n 3 bol csak 2 melegszik a buffer chippe hidegek van skop-om de nem tudom mit kellene ellennorizni egy Y board-on van egy van e valami gyorskepzo leiras vagy video ?
A main-bol skoppal mertem video jelet az van
vajon eszleli hogy hianyzi e buffer chip
elore is kosz ha segit valaki
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
Üdvözlet mindenkinek!
A címben említett tv készülék képe el van mosódva,hang jó.Találkozott már valaki ilyen problémával,mi lehet a probléma,merre keresgéljek?Előre is köszönöm.
http://www.kepfeltoltes.eu/view.php?filename=364IMG_20170909_121347.jpg
http://www.kepfeltoltes.eu/view.php?filename=356IMG_20170909_122021.jpg
http://www.kepfeltoltes.eu/view.php?filename=385IMG_20170909_121654.jpg
Üdv:Mitu
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