Replacing the speaker

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Open the speaker and look for loose connections. Carefully move cone with fingers. If there is noise when doing so...rubbing type noise, speaker needs reconing or replacing. If the crackling comes from teh tweeter section, then the tweeter may need replacing.

Hello

If there is no audio output from your tv, either your TVs speaker or its audio output IC has damaged. You just check it with an earphone/headphone, if there is an earphone or headphone socket in front panel of your TV. If there is sound from the headphone/earphone, and not from the speaker, means the speaker has damaged. You have to replace it with same type and number. Just check your set's audio out socket, if any provided, connet it to any external audio sourse, like amplifier or so, and check whether there is sound output from it. If not, your Tv/combos' sound processing IC inside has some trouble.
most common fault is related to sound output IC or speaker itself. If speaker is found OK, go to the sound output section. This section can be easly located as speaker wire goes to that section, and follow it. Before replacing the IC, check its leads for any loose or bad soldering. i advice you to resolder all the terminals of that IC, by applying a little more solder, without making any solder bridge loose contacts between them. If this does not helps, replace the IC with an identical type and number. OK.

Hello

First you check the speaker of your Daewoo Tv. To check the whether the speaker is good or damaged, place your year very close to the speaker side of your TV, and switch the TV by its front panel power switch, not by the remote control. If you can hear a "Thumb" sound from the speaker, as the TV is switched on, the speaker is good and you have to to further. If not speaker has got damaged and have to be replaced.
If your TV is provided with an earphone or headphone socket at its fron panel, insert a earphone or headphone pin into it and listen whether there is sound coming from it or not. If ther comes the sound, it doesnot comes to the speaker, means that the headphone or earphone socket is faulty. Replacing it will solve the problem.
If there is AV OUT from your TV, connect it to an amplifier or so to get the sound. If there is sound and no output from speaker, means the Audio Output IC inside your TV is faulty.
Just locate the audio output Ic, and replace it with same type and number. Audio Output IC can be easly located ans speaker wire goes to that section, and follow the speaker wire. locate it. If you need any more assistance, feel free to contact me through Fixya. OK.

Hello Adrenalize, hi, you may be right, but also check other ICs as well, the humming sound can be caused by the amplifier or its preamp section, this is where the 1036 (this is a dc operated tone control) is located. But before replacing the 1036, try first replacing the POWER AMP IC. (my experiences with those humming sounds usually are caused by IC amplifiers and op-amp ICs.)

Hello
Distroted sound may due to some fault in the speaker or its ouput stage inside your TV. You jsut open your TV and unsolder the wires from speaker, and solder it to an other speaker and see whether the sound is normal or not. If it is normal, you can make sure that the speaker of your TV has damaged.
Other reason is of some fault in the output section of your TV, which is integrated on its circuit board. You just locate the audio output section on the circuit board. it will be an Ic that drives the speaker. It can be located very easly following the speaker wires. usually it is screwed on to a metal plate, and will have a number printed on it. Sometimes there may be some bad solderings on its leg solderings. You just resolder all the pins of that Ic by applying a little more solder to its points, and see the effect.
If this cannot rectify the problem, just resoder the Ic out from the cirtuit board, and go for a same type and number. Replacing it will solve your problem. Ok

Hello
you just start from speaker first. if the speaker is out there will be no sound output from your TV. To confirm this, just plug in an earphone or headphone pin into the headphone or earphone socket , if provided, on the TV. If sound is available through headphone, it means that the sound output section of your TV has no trouble, but the speker is out. Replacing it with same type and number will resolve your problem. If there is no sound fron the earphone too, surely the sound output section inside the circuit board of your TV has the fault.
If so you have to open your TV. Locate the sound output stage, which can be easly locted through following the speaker wires. There will be an Ic [Sound Output Ic], normally screwed onto a metal plate, to radiate heat out when it works. Check for any bad solderings at the legs of that Ic by tuning the printed circuit board upside down. It is very difficult to locate loose solderings. i always do is, resoldering the suspected solder points by applying a little more solder. You also do this first. If it does not help, resolder the Ic out from the circuit board, and go for a same type and number. Replacing it will solve your problem. In some RCA sets, sound section is built out on to another board. Locate it and do the same. OK.

Hello
If picture is OK and there is no sound output from your tv, means either its speaker or the Sound output Ic is not working. The case of speaker fault can be easly detected without opening the TV. You just place your ear very near to the speaker side and switch on the TV by AC mains [not with remote control]. You may hear a "thumb" SOUND OR A "HUM" sound from it. If any one is there the internal speaker is working fine. The fault lies in audio output Ic stage. If there is no sound said above, speaker can be suspected. Befor confirming that the speaker is faulty, if your TV has an earphone or headphone jack in front, insert the earphone or headphone socket into it, and check whether there is any sound heard from it. If there is sound from headphone, means that the headphone socket is faulty, it does not bypass the sound to the speaker. When head phone is connected, the connection to the speaker will automatically cut of. When it is pulled out from the socket, the speaker connection will resume. If the changeover switch inside the earphone socket also show this kind of trouble. If the speaker inside is found faulty, unscrew it out of place after opening the TV, go for a same type and number, impedence and shape.
If there comes the above said "HUM" sound from the speaker, surely the Sound Output Ic is faulty. Replacing it will solve the probelm. Before replacing it, check it soldering points for any loose contact. It is best to resolder all suspected point is sound section before replacing the ic.
Note: In modern TVs there will be any trace of sound, without a video signal. Without video, sound is muted. ok.

Possible failure of the output IC in the Tv's audio section.
First of all open and check for possible failure of the main power supply to the output IC, Check if the series fuse/fusible resistor has opened, if after replacing the same issues come up then it is confirmed that the IC is defective.
If power comes to IC then check on the bias resistors around the IC or the feedback loop,-- capacitors in this section.

Hello,

Please click here to open the service manual

1.Prepare the computer for disassembly (refer to Section 6.3, “Preparing the Computer for Disassembly,” for more information).
2.Remove the cmos battery (refer to
Section 6.24, “System Board,” for more information on removing and replacing the RTC battery).

CompQ