HIKVISION DS7208HVI-SN Product/Maintenance Manual - Page 17
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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
⑩.USB Fault
Step one: measurement SESR05 (QA1 or QA2) 2, 3 feet voltage difference
value (normal voltage difference about 3.05 V), as well as the impedance to the
GND, or replacement
Note: SESR05 (QA1 or QA2),front and after USB interface is independent of
each other
SESR05 （ QA2）
SESR05（QA1）