Question about Sony FD Trinitron WEGA KV-20FS120 20" TV

4 Answers

No Power on Sony TV

I have a Sony TV model KV-2167MT Trinitron.I'm facing problem while switch on from front switch Standby LED blinking while press any switch Like Volume up down, program up down. but power not on. I replaced 2sd1878 and PS801. it work 30 minutes after that transister get short again I change tr. but problem is same. Tr. 2sd1878 short after 30 minutes. I check output voltage 110V DC is normal. Any one have solution. please reply...

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  • Jatinder Singh
    Jatinder Singh Aug 23, 2007

    Hi MikeNJ1964,

    I replaced original Sony Transister and resolder the pins of the horizontal driver transformar and near area printed circuit board. But it not help me again transister short after few minutes.

    Please suggest what to do???

    Thanx,
    Jatinder

  • Jatinder Singh
    Jatinder Singh Sep 10, 2007

    Hi MikeNJ1964,

    I try with above mention solution. first i clean all PCB and re-solder all component near to Horizental output section and observe more then two hrs. Know set is working fine.

    Thanks a lot for given valuable tips.

    Jatinder
    9811196073
    Jatinderbajwa@yahoo.com

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Dry solder in vertical out put section & Vertical ic LA7830

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Maybe the problem why d1878 busted is due to defective FBT

Posted on Feb 15, 2012

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I have sony trinitron KV-2167MT, when i power on the screen display line in the center only?please help me out as soon as possible?thank you

Posted on Jun 28, 2011

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Be sure to use an ORIGINAL Sony transistor and be sure to resolder the pins of the small horizontal driver transformer and all parts connected to and around it, and your set should be fine.

Posted on Aug 18, 2007

  • Mike Longo
    Mike Longo Aug 23, 2007

    Again, you must be sure to use an original Sony horizontal output transistor and you must resolder the pins of the horizontal DRIVE transformer, not the flyback transformer. The horizontal drive transformer is the little transformer that is connected to the BASE of the horizontal output transistor, with 4 working pins. The flyback is the large transformer connected to the COLLECTOR of the horizontal output transistor, with many pins arranged in a circle. The little drive transformer has one or more large resistors near it and the little drive transistor. Be sure to solder all pins of that little transformer and ALL parts near and around it, and all parts between the little transformer and the output transistor, as well as all damper diodes, safety caps and yoke connector pins. If you have resoldered all of those and used original Sony parts and the set still fails, it is time to take it to a qualified tech familiar with Sony sets.

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