Acer AC701 AC701 Monitor Service Guide - Page 17

6. VIDEO AMP. CIRCUIT A. VIDEO PRE. AMP. The video pre-amp IC is U201(LM1269). The input signal is 0.7Vpp, then pre-amp IC U201 amplify the video signal to 3~4Vpp. The U201 is controlled by up via I2C bus, Fig5 is the block diagram. B. VIDEO AMPLIFIER The video amplifier is U203(LM2467), it amplify video signal to about 40Vpp. Video output signal add to cathode by AC coupling, Fig6 is the block diagram.. The DC bias is controlled by the IC U204(LM2480), Fig7 is the block diagram.. Fig 6 is the block diagram Fig5 17