7-3
2. Power circuit
2.1 Power input
12V DC input from power Board through J601 to interface.
2.2 DC to DC circuit
IC610 is used generate the system power. It have built in 1 channel PWM controller to provide voltage
output.
The output (3.3V) is provide panel Vcc and 2.5V regulator input.
and provide the Scaler and MCU power.
2.3 Panel Vcc control
Panel power control used Q301 and IC301 from IC101 (pin35) PANELVCC_CTL.
While the PANELVCC_CTL stay at High level ;the panel voltage is 3.3V.
While the PANELVCC_CTL stay at Low level ;the panel voltage is 0V.