HIKVISION DS7208HVI-ST Produkt-/Wartungshandbuch - Seite 7
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- 1. Ds7208Hvi-St/Sn Equipment Physical Interface
- 2. Ds7208Hvi-St/Sn Equipment Internal Structure
- 3. Ds80061 Mainboard Hardware Principle Diagram
- 4. Ds80061 Mainboard Hardware Modules Diagram
- 5. Ds80061 Mainboard Hardware Module Introduction
- 6. Network Module
- 7. Power Supply Module
- 8. Ds80061 Mainboard Failure Analysis
5.2. VGA Output Module (Local Preview Image Output Module)
VGA main chip module： LVC07A, 6303; LVC07A PIN 2 output single(VS)
and 1 K resistance (RL50) connect 5V voltage, PIN 4 output signal (HS) and
1 K (RL51) resistance connect 5V voltage
BAV99: control VGA output amplification, if BAV99 (Q9) 3 feet low level
(voltage 0 V), it means the system to detect VGA display; If you meet VGA
display, system and output signal and system menu VGA; If behind the VGA
display, the system only output VGA signal; If the high level (close to 3.3 V),
it means the system does not detect the display
VGA signal output basic schemes:
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:
①
75Ω(RG6)
②
75Ω(RG5)
75Ω(RG4)
③
④
⑤
BAV99(Q3)
BAV99(Q8)
BAV99(Q7)