Re: "Dick Smith" 55" LED backlight issue - model GE6880
The FB pin is for feedback regulation, just about any SMPS IC has the feedback pin function. So if the LED+ drops to 0 then that means U103 (OB2263) went into shutdown so we need to find out if the PFC Voltage feeding the LED power supply is still present or not.
I slo need to find out what the FB1 (pin 8 VFB) is for.
The FB pin is for feedback regulation, just about any SMPS IC has the feedback pin function. So if the LED+ drops to 0 then that means U103 (OB2263) went into shutdown so we need to find out if the PFC Voltage feeding the LED power supply is still present or not.
I slo need to find out what the FB1 (pin 8 VFB) is for.
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