Re: Sony KDL50EX645 Six Blink
OK, so sometimes you get lucky and sometimes not. I finally got the 2.7 meg resistor and installed it and still no back light.
I tested the stand alone Power Supply by jumping pin 1 to pin 3 with a 1K resistor, PFC voltage and 12 Volts all OK as well as 24 Volts to LED Driver board, so the Power Supply seems to be working with no load.
With everything connected the Power On pin cycles to 3.3 volts when the power button is depressed but only stays there for about one second.
See PDF for voltages
I have checked the LED's with a low current tester and they appear to be OK, there are 16 different control lines and each read approximately 38 volts.
The LED Driver board is a bit of a mystery, it connects to the TCON??
OK, so sometimes you get lucky and sometimes not. I finally got the 2.7 meg resistor and installed it and still no back light.
I tested the stand alone Power Supply by jumping pin 1 to pin 3 with a 1K resistor, PFC voltage and 12 Volts all OK as well as 24 Volts to LED Driver board, so the Power Supply seems to be working with no load.
With everything connected the Power On pin cycles to 3.3 volts when the power button is depressed but only stays there for about one second.
See PDF for voltages
I have checked the LED's with a low current tester and they appear to be OK, there are 16 different control lines and each read approximately 38 volts.
The LED Driver board is a bit of a mystery, it connects to the TCON??
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