LG FLATRON E2040S Service Manual page 14

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Converter Board Block Diagram
1. Boost circuit: Boost converter, the function is to convert 12V to the turn-on voltage of LED.
2. On/Off circuit: Main board provides ENA signal to make the converter system On or Off.
3. DIM circuit: Main board provides PWM signal to make the light LED On or Off.
4. IC ta9690: Converter controls IC, the function: provide PWM driver signal to Boost converter, balance the LED
current, set the maximum output voltage of OVP.
5. OVP circuit: set the maximum output voltage of OVP, through this voltage IC can neglect the OPEN's string.
6. Current feedback: LED feedback current detection.
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