All,.
I have a Samsung PN58B650S1FXZA Plasma TV I got from a friend that he said he was watching one day and it just quit;
Found the Y main Board fuse blown which later was diagnosed to be a considerable number of blown (shorted) MOSFETs.
It was more economical (about $35 in parts and quicker) to buy a new Y-Main Board. Originally went looking for a used board but I found by accident a New-Old-Stock board (originally from Samsung) from a local fellow who is closing (closed) his TV/electronic repair shop. Cost was about $20 more than parts.
Shipping on this dusty box said it came to him in 2011....Board looks perfect...no signs of heat or ever being used.
Part Number BN96-09758A...The only difference I see in my board and the new...Its revision is 1.3 and mine is 1.2 date is less than months difference between boards. Everything else including PCB and PBA Numbers/silk screening is the same.
Tested the Y-Buffers similar to the below video;
Did not see any issue with the Y Buffers.
Anyways then I put in the new YMain board.
Unfortunately no dice on the TV coming back to life.
So I started taking Voltage readings;
Panel Label says for reference.
Va -> 55V
Vsc -> -190V
Vs -> 202V
Ve -> 95V
CN801 Power Supply Tests
VS_ON and PS_ON both test 3.3V at appropiate times and go to 0V Otherwise.
After TV not in Standby point and warmed up to assumed On (10-15Mins)
Power Supply
Vs @Point Test -> 202.9V
Va @Point Test ->55.0V
YMain Board Tests
Vs @wire Connection (2) -> 202.9V
Vs @Removal Fuse Points (Both Sides) -> 202.9 V
Vcc @wire Connection -> 15.0V
Vscan @Point Test -> -197.3 (Should be -190V ...I wonder if this needs to adjust?)
XMain Board Tests
Vs @wire Connection(2) -> 202.9V
Vcc @wire Connection -> 15.0V
Vb @Test Point ->108.5V (Seems higher than Panel Label wonder if I should adjust to 95V?)
LED on TCON is flashing about 1 a second maybe a little faster.
I then Tried the process marked out in the below YouTube video about Troubleshoooting and Test Patterns.
Test pattern process (shorted ps_on pin, Main board disconnected from Tcon LVDs cable, and 3-4 pin shorted) but still no life in panel.
Not sure where I should go from here...Ideas or Suggestions?
Thanks everyone,
Chris
I have a Samsung PN58B650S1FXZA Plasma TV I got from a friend that he said he was watching one day and it just quit;
Found the Y main Board fuse blown which later was diagnosed to be a considerable number of blown (shorted) MOSFETs.
It was more economical (about $35 in parts and quicker) to buy a new Y-Main Board. Originally went looking for a used board but I found by accident a New-Old-Stock board (originally from Samsung) from a local fellow who is closing (closed) his TV/electronic repair shop. Cost was about $20 more than parts.
Shipping on this dusty box said it came to him in 2011....Board looks perfect...no signs of heat or ever being used.
Part Number BN96-09758A...The only difference I see in my board and the new...Its revision is 1.3 and mine is 1.2 date is less than months difference between boards. Everything else including PCB and PBA Numbers/silk screening is the same.
Tested the Y-Buffers similar to the below video;
Did not see any issue with the Y Buffers.
Anyways then I put in the new YMain board.
Unfortunately no dice on the TV coming back to life.
So I started taking Voltage readings;
Panel Label says for reference.
Va -> 55V
Vsc -> -190V
Vs -> 202V
Ve -> 95V
CN801 Power Supply Tests
VS_ON and PS_ON both test 3.3V at appropiate times and go to 0V Otherwise.
After TV not in Standby point and warmed up to assumed On (10-15Mins)
Power Supply
Vs @Point Test -> 202.9V
Va @Point Test ->55.0V
YMain Board Tests
Vs @wire Connection (2) -> 202.9V
Vs @Removal Fuse Points (Both Sides) -> 202.9 V
Vcc @wire Connection -> 15.0V
Vscan @Point Test -> -197.3 (Should be -190V ...I wonder if this needs to adjust?)
XMain Board Tests
Vs @wire Connection(2) -> 202.9V
Vcc @wire Connection -> 15.0V
Vb @Test Point ->108.5V (Seems higher than Panel Label wonder if I should adjust to 95V?)
LED on TCON is flashing about 1 a second maybe a little faster.
I then Tried the process marked out in the below YouTube video about Troubleshoooting and Test Patterns.
Test pattern process (shorted ps_on pin, Main board disconnected from Tcon LVDs cable, and 3-4 pin shorted) but still no life in panel.
Not sure where I should go from here...Ideas or Suggestions?
Thanks everyone,
Chris