⬇ [EMI Filter & Bridge Rectifier] (D1, C1, C2) ⬇ [PFC Boost Converter] (Controller: Usually FAN7930 or equivalent) ⬇ [Main DC Bus] (~390V DC) ⬇ ┏━━━━━━━━━━━━━━━━━━━┓ ⬇ ⬇ [Standby SMPS] [LED Driver] (IC: NCP1207 / OB2273) (IC: BD9261 / MAP9002) ⬇ ⬇ [5V Standby] [LED Backlight+] ⬇ [12V Switcher] (Mosfet Switch) ⬇ [12V Main Rail]