HIKVISION DS7208HVI-SN Instrukcja produktu/obsługi - Strona 16

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⑤.RS485 Failure

Step 1: the first to exclude thermistors JK250 (RPT1/2)

Step 2: measurement TVS tube B03NC (BA2/7) impedance, or replacement

Step 3: measurement 6L184 6and 7 feet chip difference voltage (normal close

to 5 V), or replacement

⑥. Internet Links

Network light and network data transmission light are flashing



Step 1: first measurement RTL8201 chip PIN 36 input voltage 3.3V is normal, or

to measure WCX (FBN1) impedance, or replacement

Both network light and network data transmission light not bright



Step one: first measurement 25 M (Y3) crystal, or replacement

Step two: replace RTL8201

Both network light and network data transmission light are nomal



Step one: first replace RTL8201, and then ruled out MS10232, BV03C

（TVS32/17）

⑦.SATA Hard Dish Fault

Step one: first measurement BD9329 (U1) PIN 3 power output voltage wheather 5V or short

circuit, or replacement

⑧. Clock Fault

Step one: the first to rule out the battery (normal voltage 3.3 V), and then ruled

out 8563 T, 32768 HZ, diodes

⑨.VGA Output Color Devation

Step 1: measuring 75Ω resistance (RG4/5/6), or replacement

Step 2: measurement BAV99 (Q3/7/8) PIN 3 impendance to GND, or

replacement

Step 3: rule out 6303 chip