HIKVISION DS7208HVI-ST/SE Product/Maintenance Manual - Page 5
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4. DS80054 Mainboard Hardware Modules Diagram
RS485module
Power module
SATA
power
module
SATA interface
5. DS80054 Mainboard Hardware Module Introduction
5.1. Audio Video A/D Module
Video A/D Module Main Control Chip:TW2866 Audio
1) TW2866(US1)PIN 6 control first audio input(input matching resistance
100 (RU9) and capacitance (CS18))
2) TW2866(US1)PIN 13/17/21/25 control 1-4 road vedio input(BNC input
matching 4 HK-5 production tube ( TVS2/4/6/8 ) ; 4 75Ωresistance
( RV2/4/6/8 ); 4 100Ωresistance ( RU1/2/3/4 ); 4 capacitance
(CS12/8/13/11) )
3) TW2866(US2)PIN 13/17/21/25 control 5-8 road vedio input(BNC input
matching 4 HK-5 production tube ( TVS1/3/5/7 ) ; 4 75Ωresistance
VGAmodule
Network module
RS232 interface
Front-panel interface
Diagram 1.2 DS80054 Mainboard Hardware Modules Diagram
VOUT module
Clock module
Network module
USB interface
A/D module