Question about Sony FD Trinitron WEGA KV-32FS120 32" TV

2 Answers

The red stand by/timer light on my Sony 32' Triniton flashes whenever I turn my TV on but the picture won't come up. What do I do?

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  • gr8fl1 Jan 31, 2010

    It flashes 7 times; three second delay, 7 more flashes and so on.

  • gr8fl1 Feb 01, 2010

    The model number is KD-34XS955

  • gr8fl1 Feb 01, 2010

    Thanks for the suggestion; however, I'm a pretty low tech guy. Can you break it down for me? I don't have a meter or anything like that--only hand tools. Thanks very much for you help--Grant

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2 Answers

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  • Sony Master
  • 5,807 Answers

Hi,

here is a guide for a start, may not be like the one you have,

but maybe applicable flyback , only if it is CRT type

b ) Service Manual could be of much help to you if you can

possibly have one, only with a fee.


c ) if there is no light indicator, or something is blinking in your front

panel of the TV it indicates a bad power supply.

d ) if the unit doesn't light at all, assuming the outlet is good,

then most probably the fuse might have been busted.

e ) if the fuse is busted , status is blackened inside, it is not advisable

to just replaced the said fuse, you might have other trouble , causing

it to fail.

f ) it might be a bad horizontal output transistor, have someone to

help you , look for it and properly check.ed.

g ) there might be other causes if your TV status light is blinking.


Here are your initial check list

h ) Confirm that the voltage of more than 23.0 VDC appears between
TP85 and ground on the A Board.

i ) Confirm the voltage of A Board TP91 is 134.6 ± 1.0 VDC

j ) Check Q502 ( 2SD2645 ) is not shorted


k ) post the number of blinks the TV

you are having and will try to update for more possible causes.


Let me know, if you needed further assistance.



Thank you for choosing FixYa for assistance. I hope that my

information proves useful to you. If so, please take a moment

to provide me with a positive rating. I'd really appreciate it.


Regards,

palaboy



Posted on Feb 01, 2010

  • 1 more comment 
  • Rommel Cana
    Rommel Cana Feb 01, 2010

    Blinks 7 times

    Horizontal Deflection Stopped

    Either

    a ) a +B overcurrent is detected ( IC5007 )

    b ) overheating is detected ( Thermistor TH5002 )

    c ) check these circuits ( might be shorted )





  • Rommel Cana
    Rommel Cana Feb 02, 2010

    these might look like the TV you are having




    You will notice that there are yellow and pink circles.

    a ) Your target mission ( troubleshooting ) is the yellow circle

    b ) Pink circle will just be for checking if your troubleshooting and repair is OK.

    ( see sample guide on flyback , )



    Here is your flowchart to follow:




    It would be best to have a service manual, one like these @

    http://www.e-servicemanuals.com/product-...

    if you cant view properly the details on the image , or aid you in further diagnosis



    There are colorful guide and pictures that I'm sure you will appreciate and be safe.


    I wish I could tell

    you there was a quick fix or button to push that would fix

    the TV but that is not the case or the solution needed to get

    the TV operating correctly.



    those are just possible causes ,

    There could be many reasons. But, more Often, it would be

    on the Circuits Board. You need to Open the TV, unplug the

    wires from Circuits Board, pull it out and check it.

    More often, you would find either a Loose Solder

    connection or Leaked / Bulged / Swelled capacitor, shorted transistor,

    open/burnt resistor ( no resistance ) or a changed-value .. You

    need to note down the part number and you could order it

    online or go to your Local Electronics shop and

    purchase it. Once you solder it, it would be all set.



    Determine the symptoms; identify the cause of the symptoms;

    repair the unit to eliminate the cause


    Don't forget to check the circuit above, without those working , follow the flowchart.


    Let me know, if you needed further assistance.


    thank you for choosing Fixya for assistance!



  • Rommel Cana
    Rommel Cana Feb 20, 2010

    here is the Horizontal Output Transistor dimension






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  • Master
  • 10,594 Answers

Hi,
Please count red standby light flash as there would be 3 seconds pause between flashes and let me know to diagnose problem.
Like red light blinks 4 times, pause of three seconds, again 4 times blinka etc.
Thanks.

Posted on Jan 31, 2010

  • Shahid Electronics
    Shahid Electronics Jan 31, 2010

    It flashes 7 times; three second delay, 7 more flashes and so on.
    =======================================================

    Question shows it is Sony KV-32FS120 that has no code of 7 blinks.
    Please recheck tv model number written at back of your tv.





  • Shahid Electronics
    Shahid Electronics Feb 01, 2010

    The model number is KD-34XS955
    =====================================

    OK, 7 time blinks shows Horizontal Deflection Stopped in TV
    Check horizontal deflection section, h-out transistor, flyback transformer and surrounding parts.



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