Question about Zenith B13A02D 13" TV

2 Answers

Will not power on

The above TV worked fine until a lightning storm. The house is equipped with capacitors in the panel for absorption and no other issues developed in the house.
The AC runs up through the cord to the board and the fuse is good. There are no problem spots ( burns) on the board. The on/off micro switch operates well.
The tube looks fine so I'm guessing that a small problem ( open circuit) exists in the power supply.
I have an electronics background but without the skematic I'm clueless.

Any suggestions?
Thanks.

Ken Kuehn

Posted by on

  • 1 more comment 
  • kenkuehn Jul 30, 2008

    The HOT Transistor you speak of. What number is it on the board or what are the values or color or size?

    Thanks.



    Ken Kuehn

  • kenkuehn Jul 30, 2008

    Brand name Zenith Model #B13A12D. I believe it is item Q402 on the board.
    Ken Kuehn

  • kenkuehn Jul 30, 2008

    Model # was wrong. It is B13A02D

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2 Answers

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  • 382 Answers

Hello,
This could be possibly due to a power surge..So i expect a fuse burn or blown IC on the board..Make a step by step inspection of the circuits on the board you can easily make out the defective IC or resistor..Thank you!!!...

Regards!!...

Posted on Jul 30, 2008

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  • 2,071 Answers

This symptom caused by shorted (HOT) Horizontal Output Transistor,change this transistor,so it will power on again..


hope this may help;

Regards,
VOTIT

Posted on Jul 30, 2008

  • LORETO LACARON
    LORETO LACARON Jul 30, 2008

    click for the sample picture guide of (HOT) transistor this near to flyback,give me the brand name and model number;

    Phillips F8 chassis

    Regards,
    VOTIT


  • LORETO LACARON
    LORETO LACARON Jul 31, 2008

    Check that transistor if not short Q402 it is better you
    take it from the board test it with the use of multitester in supply section
    look for the STR IC it has 9 pins take it change it with identical rating,that
    IC is power surge protector ,i have a service tips of Zenith troubles,below and
    a downloadable manual...




    Dead Unit has no life at all. We have had several of these
    all having no power / no click from the ON/OFF relay or the Degausing Relay



    Using STR53041 Regulator Always replace: CX3413 = 22mf 63V, CX3416
    = 100mf, 25V, RX3404 180k (use 1/2W). Also check:
    RX3407 = 47 ohm,1W, Rx3408 22 ohm, 1/2W QX3401
    121-1348 (use ECG184 or one of many other transistors with similar spec's
    listed in the ECG guide under TO-220 and TO-220J case styles 4 only (A 1Amp
    rating is required). If that doesn't do it replace ICX3431 - STR53041.


    Zenith B13A02D
    Manuals, Support and Troubleshooting
    Regards,
    VOTIT








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