Question about Sony FD Trinitron WEGA KV-27FS120 27" TV

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Sony KV-27S42 no sound and audio blinks four times

My Sony KV27 s 42 stop last week
timer LED blinks four rimes
I heard and check relay sound,fuse is okay getting 7.5 volt
but missisng +13/-13 V
pls help to fix these monster??

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+13 & -13 requires for Vertical Deflection IC and produced by Flyback Transformer, these volts will be produced IF Horizontal deflection circuit works properly. so try to check H-Out Transistor and its necessary volts / signal. Pls also mention correct Model Number to provide you more help.

Posted on Aug 13, 2008

  • Shahid Electronics
    Shahid Electronics Aug 13, 2008

    Its detail of 4 times Red-LED blink...



    * +13V is not supplied. (A board)



    * IC 541 is faulty (A board) * Vertical deflection pulse is stopped.



    * Power line is shorted or power supply is stopped.

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• On most , it means " Vertical Deflections stopped ".

and according to service manual diagnostics.


These information is for those who have knowledge

and understanstanding of electronics repair.



Level of difficulty:

• Hard : for a newbie

• Easy: for those who have tools and kniwledge



Estimated Time of Servicing

• thirty (30) minutes for a pro

• from three ( 3 ) days to week (s) for a newbie



• Check on it first, or have someone to help you

verify and troubleshoot .


thanks for choosing Fixya for assistance.

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