Acer AC701 AC701 Monitor Service Guide - Page 13

F. DEGAUSS CKT: The DEGUSS signal which comes from micro-p to control degauss coil act or not. When DEGUSS is high, Q950 will be saturated to make RL901 working, AC line provides a degaussing current to degauss coil. G. OVERLOAD PROTECTION CKT: The primary current flows through the current sensing resistor R907. The sensing voltage through the R907, R911, C914 to U901 pin3, If the current up, the U901 pin 3 voltage will be follow up, When the voltage>1 V, the U901 duty-cycle shall be limited, Made the output voltage down in the meanwhile make the U901 VCC voltage down, the U901 pin 7 fall down under 10 voltage in the then, U901 stop action, made over load for protection. 13