HIKVISION DS7208HVI-ST/SE Product/Maintenance Manual - Page 8
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6303
74LV07
① : PIN 10 output "R" signal ;
② : PIN 11 output "B" signal ;
③ : PIN 12 output "G" signal ;
④ : PIN 4 output "HS" signal ;
⑤ : PIN 2 output "VS" signal ;
VGA master chip : 74LV07 and 6303
Description:
74LV07
BAV99 :
If the PIN 3 of BAV99(Q9) is Low-level ( 0V ), Said system detects VGA
monitor;
If the PIN 3 of BAV99(Q9) is high-level (nearly 3.3V),said system doesn't detect
VGA monitor;
VGA
module
components：
①
75Ω(RG6)
②
75Ω(RG5)
75Ω(RG4)
③
④
⑤
5V
RL50
Ω
1K
VS(Interlacing signal)
PIN4
HS(Line signal)
PIN2
RL51
Ω
1K
5V
BAV99(Q3)
BAV99(Q8)
BAV99(Q7)