Hello,
I need some help troubleshooting a Samsung PN60F8500AF Plasma tv. It does not turn on, just has a red flashing standby light when plugged in. I did some basic troubleshooting on my own. I removed the back panel, looked for any bad caps, burnt looking parts and tested the fuses, all looked good.
From their, I took some voltage readings with a MM. While the unit is plugged in, I tested all the voltages throughout the board at all plugs/connectors and found voltages matching stated ranges, except the VS AND VA voltage and this is where I need help.
I took readings right from the main power supply board/SMPS at the VS/VA test points and also from connectors at the X- board and Y-board connectors. VS should read 210v, but only reads 11v and VA should be 60v and reads 0v. Now when I first plug in the unit both read proper voltage for an instant, then gradually drop down to the low voltages I've found. Is that normal?
I also tested the connectors from the power supply into the logic/main board
standby has 5.2v and PS-ON has .02v, but ps-on reads 3.1v while the unit is unplugged.
I also tested continuity/resistance at all the y-board to y-buffer and x-board to x-buffer connections. All connections has no continuity/resistance to ground, except 2pins (pin #2 & #3 from the top)on the x-board upper most connector. I've included some pictures of the board,connector and the main tv itself.
As all of you know, this is expensive tv and would love to get it up and running again. Any and all help would be greatly appreciated!
I need some help troubleshooting a Samsung PN60F8500AF Plasma tv. It does not turn on, just has a red flashing standby light when plugged in. I did some basic troubleshooting on my own. I removed the back panel, looked for any bad caps, burnt looking parts and tested the fuses, all looked good.
From their, I took some voltage readings with a MM. While the unit is plugged in, I tested all the voltages throughout the board at all plugs/connectors and found voltages matching stated ranges, except the VS AND VA voltage and this is where I need help.
I took readings right from the main power supply board/SMPS at the VS/VA test points and also from connectors at the X- board and Y-board connectors. VS should read 210v, but only reads 11v and VA should be 60v and reads 0v. Now when I first plug in the unit both read proper voltage for an instant, then gradually drop down to the low voltages I've found. Is that normal?
I also tested the connectors from the power supply into the logic/main board
standby has 5.2v and PS-ON has .02v, but ps-on reads 3.1v while the unit is unplugged.
I also tested continuity/resistance at all the y-board to y-buffer and x-board to x-buffer connections. All connections has no continuity/resistance to ground, except 2pins (pin #2 & #3 from the top)on the x-board upper most connector. I've included some pictures of the board,connector and the main tv itself.
As all of you know, this is expensive tv and would love to get it up and running again. Any and all help would be greatly appreciated!
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