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Circuit Operating Descriptions
7-6-3 Amplifier (VIC1: LA73054)
VIC1 is 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 5 is high active, if the pin is floating and connecte to power, the output signal is never
ouputted.
CVBS, Y, C, R, G, B outputted from video encoder are inputted to VIC1 (Pin 2, 8, 6, 16, 11, 14).
The signal to which gain is adjusted by amplifier is outputted from jack via 75ohm Resistance (VR11~VR16).
7-16
Samsung Electronics
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