Re: Toshiba 49L621U
The PWM pin on the power supply side has the pull-up resistor to pull PWM pin solid high when not connected to the main board, which is equal to 100% pulse width which is equal to full backlights level, the switched Transistor on the main board that is connected to the PWM Dim pin is switched on and off with PWM signal from micro controller.
Glad the main board fixed the problem.
The PWM pin on the power supply side has the pull-up resistor to pull PWM pin solid high when not connected to the main board, which is equal to 100% pulse width which is equal to full backlights level, the switched Transistor on the main board that is connected to the PWM Dim pin is switched on and off with PWM signal from micro controller.
Glad the main board fixed the problem.
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