1. Power Supply and Power Status Check
Indicator Light Observation: After powering on, check if the power light is on. If it remains unresponsive, the power supply may be damaged or the wiring may be faulty (e.g., undervoltage, reverse connection, etc.).
Voltage Test: Use a multimeter to measure the power supply output to ensure stability (e.g., 12V ± 10%). If the voltage is abnormal, replace the power supply.
Power Supply Load Test: If the device frequently restarts or overheats, the power supply may be insufficient or the line voltage drop may be excessive.
2. Image and Signal Troubleshooting
No Image Output: Check the BNC connector and video cable for poor contact, or check if the lens aperture is open.
Image Interference: If moiré or rolling black bars appear, it may be due to a short circuit, electromagnetic interference, or poor grounding.
Color Cast or Whitening: Adjust the white balance (auto/manual mode) or check the exposure settings for any errors. 3. Functional Module Test
Night Vision: Block the light sensor and observe whether it automatically switches to infrared mode (completed within 3 seconds).
Motion Detection: Test the sensitivity of human or vehicle recognition, comparing normal triggering with false alarms.
Storage and Playback: Check for continuous recording and normal memory card read/write.
4. Network and Communication Issues
IP Search Failure: Verify the network cable is connected, whether the IP address is on the same network segment as the host, or whether the POE power supply is overloaded.
PTZ Control Abnormality: Check whether the communication protocols between the decoder and the host are compatible, and whether the wiring has become loose due to prolonged movement.
5. Hardware and Sealing Inspection
Interface Stability: Repeatedly plug and unplug the power/network cable to check for disconnection or poor contact.
Heat Dissipation and Sealing: Touch the body after 2 hours of continuous operation. Overheating may indicate a circuit malfunction. Check the integrity of the explosion-proof seal. 6. Environmental Adaptability Verification
Dust and Water Resistance Testing: If the device is used outdoors, confirm that it meets the IP68 protection rating (e.g., 24-hour dust test and 2-meter water immersion).
Quick Diagnosis Process
Power Off and Restart: Troubleshoot program freezes or reset circuit failures.
Replacement Test: Verify the fault point using a backup power supply or camera.
Step-by-step Troubleshooting: Narrow down the problem from power supply → wiring → device → environment.
