Sony FD Trinitron WEGA KV-20FS120 20" TV Logo

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

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Sony trinitron KV G21S2(i think)

Hi I have a Sont Trinitron... I have absolutely no knowledge about what type of tv it is. All i know it older than 10 years and i dunt even think it is a flat screen. I think the model is sony trinitron KV G21S2, about 15inches. Recently I think a fuse blew as I tried to turn the tv by pressing the main power button on the tv as it couldnt be switched on by remote or other means. As i pressed the main button I saw a small flash like explosion in the back. Now the tv cant turn on, and no light is emitted (near the main power button). What happened and is there any way of fixing it? Please reply back and comments will be greatly appreciated.

Posted by Peter Mac on

  • Andre1984 Feb 01, 2008

    I am having the same problem. When I switch the tv on through the button there was a flash, and it would turn on. However I know how to read a circuit diagram and its components very well. I had a quick look but of a preliminary inspection found no capacitors blown.

    The power supply seems to be pulling three amps and blowing the fuse, each and every time I put the tv on once I hve replace the fuse.

    Do you know a quick fix, any idea what it could be ? Or do you know were I could possibly find a circuit diagram, or service manual.

    Help please

    Thanx in advance

  • tom Apr 27, 2008

    I have a sony trintitron KV 27V55.
    It worked fine and then I came to turn it on and nothing . it's as if the switch is defective. I've tried from the front of the TV as well as the response to either one.
    It is plugged in...
    Is there a fuse on this model? If so , where.



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Id you have no TV repair experience, play it safe and take the set into an authorized Sony repair place to estimate the cost to repair. Yes I know it would be nice to repair, but how much do you know about component level printed circuit board repair? You will need to first get a service manual, know how to read a circuit diagram, thats a schematic, and know how every circuit works with each other to make the TV set operate. I do appriciate the fact you would like to repair this yourself, but there is no magic fix in most cases when it comes to electronics. There is circuit diagnosise involved. Best advice would be to call in a pro to assist you in these types of repairs. Good Luck

Posted on Jun 23, 2007


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Sony Trinitron Wega KV-27FS100 picture on and off

i'd say your tv is unhappy.

unplug for 10 min..and see if that resets it.

Sont Trinitron comes on but turns off after about 30 seconds

Try to turn it off and on with the remote about 6 times. Do not use the power button on the tv


If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience.

Won't turn on.stand-by light flashes.timers are

my Sony trinitron kv-g21s2 TV not working . conned to the power blink in TV power indicator led

No Display, no sound- not working, showing dead. But input Power is ok. Picture tube filamment not getting power. model sony KV-2192M3

Check the input fuse first. If it is blown, there will be some short inside the power regulator circuit. Usually Sony sets uses STR regulated power supply. You can see this STR, and Ic, screwed onto a heatsink. Replace it with a same type and number. Before replacing the STR, check the diodes used in that section for damage, mainlu zener diodes. They might get shorted along the blowing of the STR. Check that section throughly before resoldering the new STR.
If any further assistance you needs, get me through Fixya. Ok.

My sony trinitron turns off by itself and then the stand by light blinks five times then pauses for like 4 seconds then flashes 5 times and repeats

This is picture tube related problem and we call it incorrect white balance.
Adjust Screen Volts of picture tube and control knob wold be located on flyback transformer. If you have knowledge about tv and know that tv contains high voltage and you can take care of that then do it yourself or ask local tv repairman to fix it.

Sony trinitron kv-36fv26 (2000) tv wont show picture

Trires unplug,replug about an hour later see if it reset it self.Not take to the shop the two power ICs help the power it dead.Need it replaced.

About Sony Trinitron KV-28LS36B

there are two possible defects in your circuit. 

However, if the led blinks for about 10 times your tuner is defective 90%. 

You will need a scope to check or you will need to take it in for service. 
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