Ds80061 Mainboard Hardware Module Introduction - HIKVISION DS7208HVI-ST Product/Maintenance Manual

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5. DS80061 Mainboard Hardware Module Introduction

5.1. Audio Video A/D Module
 Video A/D Module Main Control Chip:TW2866 Audio
 TW2866(US1)PIN 6 control first audio input(input matching resistance 100
(RU9) and capacitance (CS18))
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) )
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 (RV1/3/5/7) ;
4 100Ωresistance(RU5/6/7/8) ;4 capacitance(CS42/48/29/33) )
 27 M (Y4/Y5) : TW2866 work clock, PIN 82 input 27 M
 Audio video A/D module component:
75Ω(RV1-8)
HK-5(TVS1-8)
(CS12/8/13/11)
TW2866(US1)
27M(Y4/5)
TW2866(US2)
100Ω(RU1-4)
100Ω(RU9)
(CS18)
100Ω(5-8)
电 容(CS42/48/29/33)

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