Question about Samsung TXN2730F 27" TV
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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Posted on Jan 02, 2017
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