Re: Sony KDL 32L4000 Troubleshooting
Bud,
My apologies for all frustrations working with me, but I am trying to make sure I am correctly hearing what you are saying and am truly appreciative for your efforts.
I had asked if I could troubleshoot the power board by connecting to line power without having the board installed in the TV. Now that I have the TV working because of your unceasing support I have it back together and am using it. I can pull it apart to power the old board for testing if that is required. I understood you to say that the board could not be properly worked on outside the TV without grounding the PS_ON. Since I was getting weird outputs from the power pins I understood this to mean that I wouldn't get any readings on a good board without grounding and thus my comment about not needing to ground it since 202 on the good board was also giving me voltages.
But as I re-read our discussion I believe what you were trying to tell me was that in order to test all the voltages we need to the low voltage on PS_ON because that is what will completely "energize" the supply and create all the output voltages.
Assuming I am now on the same page with you, it would seem to follow that in order for a working power board to power on the only thing I need from the main board is to provide a low voltage reading to PS-ON and thus grounding that pin would provide the same results. Therefore, it would seem that the best way to troubleshoot and test this board would actually be to work with it outside the TV and ground the PS_ON as this will remove any external issues and allow me to use the TV while troubleshooting. Is this correct?
It is also my understanding that to ground the PS_ON pin all i need to do is make a connection from PS_ON to the ground pin 4, 5 or 6? Is this correct?
Bud,
My apologies for all frustrations working with me, but I am trying to make sure I am correctly hearing what you are saying and am truly appreciative for your efforts.
I had asked if I could troubleshoot the power board by connecting to line power without having the board installed in the TV. Now that I have the TV working because of your unceasing support I have it back together and am using it. I can pull it apart to power the old board for testing if that is required. I understood you to say that the board could not be properly worked on outside the TV without grounding the PS_ON. Since I was getting weird outputs from the power pins I understood this to mean that I wouldn't get any readings on a good board without grounding and thus my comment about not needing to ground it since 202 on the good board was also giving me voltages.
But as I re-read our discussion I believe what you were trying to tell me was that in order to test all the voltages we need to the low voltage on PS_ON because that is what will completely "energize" the supply and create all the output voltages.
Assuming I am now on the same page with you, it would seem to follow that in order for a working power board to power on the only thing I need from the main board is to provide a low voltage reading to PS-ON and thus grounding that pin would provide the same results. Therefore, it would seem that the best way to troubleshoot and test this board would actually be to work with it outside the TV and ground the PS_ON as this will remove any external issues and allow me to use the TV while troubleshooting. Is this correct?
It is also my understanding that to ground the PS_ON pin all i need to do is make a connection from PS_ON to the ground pin 4, 5 or 6? Is this correct?
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