Hitachi DV-P303U Service Manual page 66

Circuit Descriptions
6-6-3 Amplifier (VIC1, VIC2 : BA7660)
VIC1 and VIC2 are 6dB amplifier. Based on CVBS signal, the final output level must be 2Vpp without 75ohm
terminal resitance. Because the level of video encoder output is only 1.1Vpp, the level is adjusted with the special
amplifier. When mute of pin 1 is high active, if the pin is floating and connecte to power, the output isgnal is never
outputted. CVBS,Y,C,Y,Cr,Cb outputted from video encoder are inputted to VIC1(Pin 7,Pin2,Pin4),and
VIC2(Pin7,Pin4,Pin2) respectively and outputted from VIC1(Pin15,Pin13,Pin10) and VIC2(Pin15,Pin13,Pin10). Pin9,
Pin12, Pin14 of VIC1, VIC2 are feedback pin to SAG compensation(DC characteristic compensation of siganl).
The signal to which gain is adjusted by amplifier is outputted from jack via 75ohm Resistance(VR10~VR13,
VR22~24).
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