Question about Sony FD Trinitron WEGA KV-27FS100 27" TV

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KV-32XBR15 power light on but no pic. notice coil burnt out and resistor fuse type 2.7 0hm near horizontal transformer. shuld i check other parts?

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Yes, you should check other parts. The horizontal output transistor is more than likely shorted. Also the flyback could have gone bad. Some SONYs have problems with the horizontal driver transformer which is connected to the base circuit of the horizontal output transistor. If this little transformer has a loose solder connection, it will take out the horizontal output transistor. This may give you some insight as to where to look for your problem. Stargazer

Posted on Jun 16, 2007


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29 inch crtv flyback transformer was making a hish bad noise till it went off dead the tv with burnt fuse what could be the main thing to first look at guys?

Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
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check your horizontal transistor maybe it's shorted replace horizontal transistor or maybe the fusible fuses are open check for open resistors at the horizontal section of the circuit.

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The green power status light will come on, but the screen will remain black, There is a buzzing sound coming from the back, it sounds like it's coming from the smps transformer not the flyback transformer,...

The buzzing comes from the transformer of the power source - it's overstressed by a short. To find out which part is shorted you must check the voltages on the output lines from the source - the voltage on the one powering the faulty part will be way lower than normal. Follow that line and test every single component until you find it. But on your tv the first thing i would test is the horizontal deflection power transistor - the one that powers the flyback.

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Blank screen but it has sound, when i turn on there is a horizontal line in the center of the screen, before it goes blank but still have sound, i already check all the resistor on both power supply and...

Your fly back, horizontal is in good condition but the possible fault is in the deflection coils or the deflection correction , pin correction section or the hirizontal width coils.
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might be a burnt transformer,or fuse if it has one.try changing the fuse most tv sets have it near the power cable if it does not work take it to your local tv repairman

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you need to isolate the failure.
first, measure the voltage (called B+ usually) on the biggest elec. capacitor in the power supply. This should be about 130-160 Vdc.
If this isn't here, then the problem is in the power input circuit.
If there, then the high-voltage supply is down. If the set is anywhere near 10 years old, then replace the flyback transformer and its transistor (H.O.T.) and go from there.
The worst case is that a power surge or something has killed the TV's brain chip and you'll have to do a board replacement.
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h/line is due to vertical section failure. 1 reduce brightness as you will get h/line due to vertical failure. 2 check v/section for loose contact or yoke connection. 3 check supply to vertical section. 4 check associated parts in v.section 5 at last check for vertical ic. resistor R410 CONNECTED TO high voltage transformator T444 is low value resistor. .5ohm to 10 ohm. it burnt again due to short cht in vertical mainly due to ic. hope this will help. as per schematic diagram go to

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The model you have has a very common problem and that would be the main Hi-voltage transformer (the flyback) , the horizontal output transistor, Horizontal drive coil between the secondary of the horizontal drive transformer and the base conection of the horizontal output transistor and/or the resistor that feeds the b+ to the primary of the horizontal driver transformer. All or part of these will be the bad componets. Now if you have never had any experience replacing solid stse componets then you should leave this reapir to the pros, as there will be soldering involved as well as the HI voltage safety issues to deal with. Good Luck

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