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tv Platinum sasiu 2KR defect imagine ciudat!


vl78stc
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salutare acest tv are imaginea ca in poze in doua cu semnal antena si una fara semnal,am schimbat cond.primar secundar, am schimbat ci baleiaj vertical si toti condensatori elect.aferenti,am masurat tensiuni U1=118V. BV=+/_14V,video=183v,tranzistorii de pe placa video sint buni,verificat lipituri,un sfat ce ar putea fi defect? suspectez tubul sau trafo

 

https://s6.postimg.org/whm70wqep/20161024_134829.jpg

https://s6.postimg.org/cbip20ur5/20161024_134913.jpg

https://s6.postimg.org/59krftr5d/2http0161024_134920.jpg

Edited by vl78stc
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22 sau 100 suna cunoscut era verde sau maro,dar dupa cum spunea si d-nl Florin posibil ca rezistenta r404 sa fie si cauza,atentie aceasta rezistenta are valoare critica si cateva zecimi de ohmi poate influenta dimensiunea verticala ,conform schemei este de 2,7ohmi

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am verificat r404 r403 r408 r405  r 402 schimbat 402 face la fel, rezistentele au fost scoase din circuit iar r404-2,7ohmi am pus alta de 2,3 ohmi si nici o schimbare, o sa verific in continuare cadrele ce a mai ramas

poate mai aveti idei.multumesc

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