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Kv-21fs150 horizontal output c5885 and diode #817 shorted

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  • Televison & ... Master
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Check its LOT [Line Output Transformer] for any damage, before replacing the blown up components.

Posted on Jul 11, 2013

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Posted on Jan 02, 2017

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You have your information incorrect, Q is not the designation for diodes, Q657 would be a transistor. First give us the correct number for the diode and how do you know it is shorted?

Posted on Aug 16, 2007

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SOURCE: shorts out the horizontal output transistor

check the right voltage in the power supply first.then check the driver circuit and last the flyback transformer.sometimes there is a faulty shorted capacitor in the 200v or the horizontal yoke coils

Posted on May 05, 2010

SD Tech
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SOURCE: my sony tv kv-14Af1 horizontal output got shorted

if it gets taken out in less than a minute or instantly you may have a cap in the horizontal driver circuit way down in value or open kvf1 is not a good model number in the Sony data base--year and model will be on back of set--KV says it is a direct view or crt type set.

Can you check and confirm the model number?

Posted on Apr 01, 2012

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What could be a cause of my sony trinitron 21''crt tv it's problem is fuse burned and STR is shorted when i change it it burned and shorted again ?

If STR is found damaged, you should check all the assciated components with it; like resistors, zener diodes etc: before replacing a new STR. All such components should be checked individually [out from the circuit]. 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. Pull up older posts.
Type in this key phrase " my service table today " in the search box at the top right of the display window of the home page, to get gathered some pages which has the details of practical experiences to the author of that site.

May 02, 2016 | Sony FD Trinitron WEGA KV-32FS120 32" TV

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My sony tv kv-bz14p40 horizontal ic(c5885) short chang anthers one than short

The LOT is faulty that's why the Horizontal Driver transistor goes faulty even after changing it. You have change the LOT Line output Transformer along with one more now c5885.
If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience.

Dec 26, 2015 | Sony Televison & Video

1 Answer

Sony wega KV-27FS12, light is flashing seems to be flashing 4 4

It seems you tv set has an overload in the output supply line which may be caused by a shorted rectifier diode or a shorted horizontal output transistor and associated circuit. The set should be serviced.


Sep 29, 2013 | LG RU-44SZ61D 44" TV

1 Answer

Tv stuck in standby mode

When a TV is stuck in standby mode often means that there is a problem with its power supply or even in the horizontal output circuitry. May be a component with short-circuit in the RGB output driven by the flyback transformer or a rectifier diode in the power supply output.
I hope having helped you.


Sep 27, 2013 | Sony Televison & Video

1 Answer

Dear sir I am working with a Sony KVJ21MF model TV with a problem in Power Supply Section. No output from Power Supply. Only Noisy Occilation sound (around 50hz) from power supply. I replaced the SRT6707...

Replace the electrolytic capacitors 220uf and 1000uf/35v on your primary section of the regulator. also check the .01 Mylar cap. in parallel with b+ rectifier diode. also check if the horizontal output is shorted..

Feb 17, 2011 | Sony FD Trinitron WEGA KV-32FS120 32" TV

1 Answer

I need sceaic diagram for sony KV-29MF8. The horizonl outot is always getig shorted?

CAuses and soultion:
1) Duplicate H Out transistor
2) Check whether the H Out is a DF or AF. If it is a DF (With diode inside) an AF wont work
3) Disconnect the H Out and connect a 100 W bulb on the collector and ground. The multimeter reading should not exceed 120V. If it is more then check powersupply components especially the transistors and diodes.
4) If the power supply voltage is fine then the problem exists with the horizontal output section. Check the yoke for short ckt or the EHT transformer.

Dec 22, 2010 | Televison & Video

1 Answer

No picture, has sound

This problem usually lies on the horizontal output transistor, try to check also for shorted diode. you can buy ftom any electronic parts dealer or radio shacks stores

Jul 27, 2009 | Sony FD Trinitron WEGA KV-32FS120 32" TV

1 Answer

Not fixed

power supply and possible horizontal short ,chech power supply if ok check horizontal o/p transistor if ok check the damper diodes for shorts,by the yoke plug./

Aug 22, 2007 | Sony FD Trinitron WEGA KV-34HS420 34" TV

1 Answer


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

Jun 11, 2007 | Sony FD Trinitron WEGA KV-27FS100 27" TV

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