ok this main board is out a vizio lcd it would turn on but no sound so I replaced main and got it to work but id like to fix this and sell it on ebay, but what component can I change to get sound to work? im pretty sure the connector in top right was for speakers
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What component controls sound on this main board
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Re: What component controls sound on this main board
Top right is the audio amplifier. There are a few other places where the audio could fail. Usually the audio has a separate power supply, 8V or 9V is pretty typical. That can go missing causing other faults...Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.
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Re: What component controls sound on this main board
Your question is akin to asking how to repair a car that doesn't start. You've replaced some expensive part and it now works, but since selling it, you have no way to test/debug the old part, or confirm that you have fixed it. I don't know what else you expect? Unless someone knows of a common fault, I think you are SOL on this one for now.Last edited by tom66; 08-02-2014, 05:14 PM.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.
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Re: What component controls sound on this main board
That IC are the stereo amplifiers (in this case they are Class D amplifiers) that drive the speakers. You have power amplifiers that drive speakers, and the n you will also have pre amplifiers which drive the input of the power amplifiers, so it is not simple.Last edited by budm; 08-18-2014, 02:04 PM.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809
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Re: What component controls sound on this main board
Originally posted by budm View Postthat ic are the stereo amplifiers (in this case they are class d amplifiers) that drive the speakers. You have power amplifiers that drive speakers, and the n you will also have pre amplifiers which drive the input of the power amplifiers, so it is not simple.
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Re: What component controls sound on this main board
Ideally, you'd use a scope to trace the audio signal through the set, which goes to the amplifier IC. It may for example pass through an op-amp or filter stage.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.
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