HIKVISION DS7208HVI-SN Manual do produto/manutenção - Página 7

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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)