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
:
100
Ω(
RU1-4
)
(
CS12/8/13/11
)
100
Ω(
RU9
)
TW2866
(
US1
)
75
Ω(
RV1-8
)
HK-5
(
TVS1-8
)
TW2866
(
US2
)
(
CS18
)
27M(Y4/5)
100
Ω(
5-8
)
电容(
CS42/48/29/33
)