Question about Samsung TXN2730F 27" TV

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Hi I am hoping that somebody could help me out with that samsung TV which i have purchased before 5 years ago, tv having problem regarding all about with sound of tv (model no-CZ-21K5G7 type-KS9A21K5 SVC MODEL CZ21K5G7ZX/XTL ).there is no any sound output in hearing,it just like silent.most of the time picture quality is good but not all the time,, I have already consult with the mechanics but they can't rectified this problem. please help me out as soon as possible rabindra kumar

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you have given me a detailed description of the fault of your Samsung TV. At first, make sure that the "mute" function is in 'OFF" positon. If it is in "ON" position, no sound output will be there from your TV as you know. If it is alright, switch OFF your set by its mains power ON/OFF switch at its front panel. You have to check this first. Keep your ear very close to the speaker side of your TV, and switch it ON by the front panel switch, and listen, whether there is any "Thumb" sound comes from the speaker or not. If there is sound, it means that the speaker is alright, and the sound output section inside the main board of your TV is faulty. If there is no sound "Thumb" from the speaker, the speaker has got damaged, and should be replaced.
The second step needs some skill in electronic work. You must have a good quality multimeter and soldering iron to proceed. Open your TV, and pull out the main circuit board out, keep it upside down, and check for any loose sodering at the audio output side in the circuit. it is a common fault to all kind of TVs that, loose solderings will occur after a long period of use. heating and cooling of these components in the audio output section will result in loose solderings at the termianals of componets. Just resolder most of the suspected solder point by applying a little more solder over it. Care should be taken not to short circuit adjecent sodler points when do this work. If this does not help you, measure the voltage at the input pin of the audio output IC. If it is found ok, desolder it out the audio output IC from the circuit board, and replace it with same type and number. OK.

Posted on Mar 18, 2011


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Half screen showing

keep tv off.
it will only get wors
if sumon dosent work on it soon
the problem you are having in the vertical section of the tv
hav a repairman resolider all conection on the vertical IC and check the serounding componets for falts.

regards daniel.
PS the repair takes me about 15 min.

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