klv-48w652d_backlight fault
For the BD9423EFV IC, the pin used to connect the resistor that sets the DC/DC converter’s operating frequency is the RT pin. This pin is crucial for setting the oscillator frequency, which directly influences the switching frequency of the DC/DC converter within the IC.
The frequency is typically set using an external resistor connected between the RT pin and ground. The value of this resistor determines the oscillation frequency, which in turn affects the performance and efficiency of the boost converter
The resistance of 1.5 k was bad which was connected to the Rt pin of the ic, after changing it, the backlight started working properly.
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