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LCD Sharp, model LC32D44E - defecte frecvente  I_vote_lcapLCD Sharp, model LC32D44E - defecte frecvente  I_voting_barLCD Sharp, model LC32D44E - defecte frecvente  I_vote_rcap 
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LCD Sharp, model LC32D44E - defecte frecvente

In jos

LCD Sharp, model LC32D44E - defecte frecvente  Empty LCD Sharp, model LC32D44E - defecte frecvente

Mesaj Scris de Costin Sam 21 Sept 2013 - 21:55

1.
Defect: lipsa backlight sau panou iluminat intermitent.

Remediere
De cele mai multe ori de vina sunt lampile (tip I, conectate cate doua in serie). Practic, inainte de a suspecta invertorul trebuie verificate lampile si orice diferenta de curent dintre cele 5 perechi trebuie sa fie un semn de intrebare.

Am intalnit lampi defecte (vad pe internet ca au gasit si altii) si contacte proaste la tub (lamele soclului nu mai sunt elastice si nu fac contact ferm cu capatul tubului) sau chiar placa de cablaj carbonizata ca in imaginea de mai jos.

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

Pentru remediere trebuie inlocuita placa cu socluri (sau refacuta, curatata de carbonizare sau realizarea conexiunii cu fir pe suport izolat, rezistent la cald) si tuburile defecte.

Nu eliminati protectia de pe invertoare. Risc de incendiu!
Costin
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