Acer AC 711 Manuel d'entretien - Page 20
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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 I
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
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2
C bus, Fig5 is the