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Only For Training And Service Purposes - LG E1941S Service Manual

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Power Board Block Diagram
1. Boost circuit: Boost converter, the function is to convert 14.5V to the turn-on voltage of LED.
2. ENA 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 TA9690GN: 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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