Question about Sony KV-27S42 27" TV

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Sony 27s42 broke the horizontal output transistor

After 30 minutes on, the tv breaks the horizontal output transistor.

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Be sure to make sure the connection on the horizontal driver transformer are soldered good. check caps around HOT

Posted on May 23, 2008

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On tv modelKV-27S42 it will not power up,Power light blinks 3or4 timesand relays do engage but no screen voltage. Can't feel hair on forearm when attempting to power up.Please help


Can be due to fault in the line output section , possible short in the EHT or there is no horizontal drive.
Need to check the +B voltage and also the sync from the IC.

Aug 08, 2011 | Sony KV-27S42 27" TV

1 Answer

Blinking picture off and on but sound is good


Hello
There is some loose soderings in the horizontal output section of your Sony Tv. it is common to get the lead solderings of the components which get heated during working; and will caus loose soderings to occur there in long run. Take out the printed circuit board out of your TV, turn it upside down, and resolder most of the suspected points at horizontal output section by applying a little more solder, without making any solder bridge in between adjecent solder point. This must solve your TVs problem. OK.

Apr 20, 2011 | Sony KV-27S42 27" TV

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The TV was working, and then randomly just shut off and won't come back on. It still makes the click noise when i turn it on, but only once instead of two. The standby light keeps flashing four times....


Hello melanie Hi, in my experience as a TV technician, that would usually be a shorted part, the horizontal output transistor, that part powers the HIGH Voltage section. Very Lethal, the power supply detects this bad part which in turn makes the unit go in standby so as not to damage the TV much further. mMy advice is go seek a tv tech to repair the part.

Jan 20, 2011 | Sony KV-27S42 27" TV

1 Answer

H out transistor defetive & number missing plz solve


Hello

The horizontal output transistor number for Sony KV-ES34M61

Horizontal output - [Q6807] == 2SC5480-01
Pin output - [Q6808] == 2SC5480-01 Again

Please replace bothe the transistor at the same time. Check horizontal output transformer [LOT of HOT], for any defects.. Ok

Jan 06, 2011 | Sony KV-ES34M61 34" TV

2 Answers

When i put my tv sony trinitron on, i hear the sound for 15sec en then the tv go out en de leds blanks


Hello
There is some sort of indirect short inside your TV. It is in the main circuit board. Most of this kind of fault in Sony Tvs are related with horizontal output stage. You just replace the horizontal output transitor [which drives the Line Output Transformer] of your TV first. If the transitor is leaky, the above said falult may occur. If it doesn't help Line Output Trnasformer [LOT] may need replacement. Check whether the replaced transistor overheats within seconds or minutes. If it overheats the LOT is faulty. Ok.

Oct 18, 2010 | Sony FD Trinitron WEGA KD-36FS130 36" TV

1 Answer

Tv wont turn on


try to plug in again...if there's no reaction at all, then the power suply section may checked...(I.C. regulator str.... followed the horizontal output transistor or some of the zener diodes regulator or broken PCB line

Jul 30, 2009 | Sony KV-27S42 27" TV

1 Answer

SONY KV-DZ29M61 horizontal deflection problem


You cannot use sub parts on sony use sony parts only. Same with hori output transistors. USE SONY PARTS ONLY.

Dec 01, 2008 | Sony FD Trinitron WEGA KV-30XBR910 30" TV

1 Answer

Sony 27S15


You Probably have a bad flyback transformer(The HI VOLTAGE) and a defective horizontal output transistor. I you have training in the tv repair , then you can go to http://www.partstore.com and getthese parts. they arte soldered in so your gonna have to know how to solder and unsolder as well. You should also know all the safety issues regarding the HI voltage in these sets. If you dont I highly advise that you take this set to a pro for repair as theres hi voltage inside these sets even when they are unplugged. Good Luck

Jun 25, 2006 | Sony KV-27S42 27" TV

1 Answer

Sony KV-27S42 not on but timer flashes


The blinking light means almost 100% that the high voltage circuit has failed. Probably need a new horizontal output transistor and flyback. Perhaps an associated resistor or diode. If you have the expertise go for it, otherwise take it to a professional. In any case be extremely careful and safe. Good luck.

Jun 21, 2006 | Sony KV-27S42 27" TV

1 Answer

Part number


oh an easy one LOL That part # is 1-453-268-21 and available at http://www.partstore.com at a price of $82.12. One thing though Make sure you check the horizontal output transistor with all the leads disconnected from the curcuit as this part sometimes goes bad when the fly does. My regular practice with any flyback replacement is to automaticly replace the HOT(horiz. output transistor) as well as resoldering the hhorizontal driver transformer and the horiz. driver transistor. Hope this assist yout repair and makes a happy one. Thats what were here for! Good Luck.

Apr 18, 2006 | Sony KV-27S42 27" TV

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