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LCD JVC model LT-26A61SU - defecte frecvente

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LCD JVC model LT-26A61SU - defecte frecvente Empty LCD JVC model LT-26A61SU - defecte frecvente

Mesaj Scris de Costin Sam 13 Dec 2014 - 20:01

1.
Defect: pornire greoaie, afiseaza diverse semne OSD fara comanda.

Cauza
Daca telecomanda nu este defecta, adica sa emita aleatoriu o comanda (se scot bateriile pentru siguranta), cel mai probabil defectiunea se afla pe placuta cu butoane de pe panoul TV-ului.

[Trebuie sa fiti inscris si conectat pentru a vedea acest link]

Remediere
Se decupleaza conectorul de pe placa cu butoane si se masoara rezistenta pe contactele fiecarui microintrerupator in parte. Se considera a fi bun daca ohmetrul va indica >10 Mohmi.
La masuratorile facuta de mine am gasit microintrerupatorul V- cu rezistenta < 0,5 Kohm.
In acest caz comanda afisata pe ecran era tot V-, dar, in functie de rezistenta parazita, exista posibilitatea ca indicatia OSD sa nu corespunda cu microintrerupatorul defect.
Costin
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