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skustran2 · Objavljeno: Ned Dec 27, 2009 5:29 pm Naslov sporočila: TV SONY KV-29C5D okvara

Lep pozdrav

Pokvaril se mi je katodni televizor Sony z oznako KV-29C5D.
Ko televizor vklopiš začne utripati rdeča lučka, zvoka in slike pa ni!!!
Če ima kdo servisna navodila, bi bila zelo dobrodošla Wink

Mirko · Objavljeno: Ned Dec 27, 2009 7:04 pm Naslov sporočila:

SE 135 JE ZANIČ

snoopy · Objavljeno: Ned Dec 27, 2009 7:34 pm Naslov sporočila:

Preštej koliko utripov naredi rdeča led dioda. S tem lahko lažje lociraš napako.
Bom pogledal za navodila.

skustran2 · Objavljeno: Ned Dec 27, 2009 9:06 pm Naslov sporočila:

Ledica naredi 2 utripa, to naj bi bila napaka na napajlnem delu,ni pa nujno lahko je tudi drugje.

V navodilih so najbrž merilne točke, da bi lažje odkril mesto napake pa tudi jaz se še učim...

ptc · Objavljeno: Ned Dec 27, 2009 10:36 pm Naslov sporočila:

2x utrip ledice je mislim da okvara na horizontali. Ali dioda ali SE regulator ali pa tranzistor.

Lp

snoopy · Objavljeno: Ned Dec 27, 2009 11:39 pm Naslov sporočila:

Iskalnik google našel , je v angleščini upam da prevod ni problem Smile

:

this is most probabely caused by a shortened line output transistor Q533. In that case, you´ll measure a short between the ´C´ and ´E´ pins of the transistor.

There are 2 reason this transistor becomes shortened. First is a due to a defective flyback transformer, but the most seen problem is that there are some dry joints in the driver stage of the line output transistor.

The ´B´ pin of Q533 is connected by some resistors to a small transformer. These resistors, the transformer and the driving transistor at the ´other´ side of the driving transformer could have bad solderings: you can check that with magnifying glasses and resolder all mentioned parts and the components in their vicinity. Also you can resolder the jungle-IC IC301. Beware of the very small spacing between the pins, it´s very easy to create a short-circuit there.

If there are no bad solderings in the driver circuit, a defective flyback transformer could be the problem.

If there is no short in Q533, only replacement of the FBT could be the solution.

In some cases, the main PSU is defective and no +135V is generated. You won´t expect error 2 (Over Current Protection) in case the power supply don´t produce any voltage, but that´s a trivia of the FE1x-chassis.

matic_scetinec · Objavljeno: Pon Dec 28, 2009 12:06 am Naslov sporočila:

Zdravo!

90% je v stiku horizontalni tranzistor.

Še shema:

LP, Matic

skustran2 · Objavljeno: Pon Dec 28, 2009 8:56 am Naslov sporočila:

Najlepša hvala vsem za hiter odziv in izčrpne odgovore.
Danes bom malo spajkal pa meril in upam da bo tv zaživel Very Happy