BenQ Q7T3-FP737S Service Manual page 25

Q7T3-FP737S Dual function LCD Monitor Service Guide
3.Circuit Operation Theorem
3.1 ON/OFF SWITCH
The turn-on voltage was controlled by R756 and R757.The inverter was turned on or off by the switching transistors
Q761 and Q757, Also regulator IC751 is control by Q761 and Q757 decide supply 15V to inverter part or instead.
Circuit Operation Theory
Confidential
10