Hi, this is my first post.
I have a Samsung PS50C550 plasma with a smashed screen (don't ask), after the screen got smashed the TV would make a 1(ish) second buzz then turn off.
I found another Samsung PS50C550 on eBay that had a good screen but apparently had "just stopped turning on".
I have moved the good electronics over but the TV will not turn on, after this I started googling and looking for a service manual but to no avail.
These are my findings though:
With all the boards plugged in I get 6 flashes from the power LED after turn on.
With all the boards plugged in, the Va and Vs voltages are not held up to there 210 and 65 volts, the PS_ON signal from the LOGIC board is held low so i'm guessing this is turning these voltages off.
When I unplug the Y_SUS board from the LOGIC board, PS_ON is 3.3V and the Va and Vs voltages are good - also the power LED on the front panel behaves as normal, ON when in standby and OFF when TV is turned ON.
This behaviour with unplugging the Y-SUS board is the same with both sets of Y-SUS and Y-Buffer boards.
Does this indicate that there could be a problem with the new panel or possibly both sets of Y-SUS boards?
I have also had a play around shorting out the jumpers on the LOGIC board with all the boards plugged in, to try and get the test screens to display. And I am sure I got the screen to flash up for about 0.5s with a display but have been unable to repeat this so think this could be a frustration induced hallucination!
Additionally, does anyone know what the different LED flashing pattern are on the LOGIC board? The two green LEDs LED2000 and LED2001 - shown in image.
With the Y-SUS unplugged, which I am presuming is running OK and not detecting a fault, is LED2000 flashing at approximately 1Hz.
With the Y-SUS plugged in, which I guess is a fault detected safe mode, LED 2001 flashes much slower - maybe 0.25Hz.
Thanks for reading and any help or input would be greatly appreciated.
I do electronics work for my job so have access to meters, scopes etc and also a technician who will be happy to undertake any surface mount rework for me (after some beer bribery).
Stuart.
I have a Samsung PS50C550 plasma with a smashed screen (don't ask), after the screen got smashed the TV would make a 1(ish) second buzz then turn off.
I found another Samsung PS50C550 on eBay that had a good screen but apparently had "just stopped turning on".
I have moved the good electronics over but the TV will not turn on, after this I started googling and looking for a service manual but to no avail.
These are my findings though:
With all the boards plugged in I get 6 flashes from the power LED after turn on.
With all the boards plugged in, the Va and Vs voltages are not held up to there 210 and 65 volts, the PS_ON signal from the LOGIC board is held low so i'm guessing this is turning these voltages off.
When I unplug the Y_SUS board from the LOGIC board, PS_ON is 3.3V and the Va and Vs voltages are good - also the power LED on the front panel behaves as normal, ON when in standby and OFF when TV is turned ON.
This behaviour with unplugging the Y-SUS board is the same with both sets of Y-SUS and Y-Buffer boards.
Does this indicate that there could be a problem with the new panel or possibly both sets of Y-SUS boards?
I have also had a play around shorting out the jumpers on the LOGIC board with all the boards plugged in, to try and get the test screens to display. And I am sure I got the screen to flash up for about 0.5s with a display but have been unable to repeat this so think this could be a frustration induced hallucination!
Additionally, does anyone know what the different LED flashing pattern are on the LOGIC board? The two green LEDs LED2000 and LED2001 - shown in image.
With the Y-SUS unplugged, which I am presuming is running OK and not detecting a fault, is LED2000 flashing at approximately 1Hz.
With the Y-SUS plugged in, which I guess is a fault detected safe mode, LED 2001 flashes much slower - maybe 0.25Hz.
Thanks for reading and any help or input would be greatly appreciated.
I do electronics work for my job so have access to meters, scopes etc and also a technician who will be happy to undertake any surface mount rework for me (after some beer bribery).
Stuart.
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