綜合佈線之監控系統無法看到攝像機圖像的原因

監控系統無法看到攝像機圖像，主要是因為以下幾個原因導致：

1.監視器到控制器或分支分配器的線路及接頭的連接出現異常，如：短路或斷路等。

2.監視器或顯示器出現故障;

3.攝像頭供電異常，如電源無法正常工作，可用萬用表測試;或正負極連接錯誤等;

4.攝像頭到控制部分視頻線路出現異常，可用萬用表測試。

除了以上4種原因，還有可能攝像頭出現異常，需考慮更換攝像頭;若攝像頭、視頻線、電源等正常，則可能是控制部分如：硬盤錄像機、視頻分配器等出現故障引起。

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The monitoring system cannot see the reason for the camera image

1. The connection of the monitor to the controller or the branch distributor and the connection of the connector are abnormal, such as short circuit or open circuit.

2. The monitor or display has failed;

3. The camera power supply is abnormal, such as the power supply can not work normally, can be tested with a multimeter; or the positive and negative connection error;

4. The camera to the control part of the video line is abnormal, can be tested with a multimeter.

In addition to the above four reasons, there may be anomalies in the camera, and it is necessary to consider replacing the camera; if the camera, video cable, power supply, etc. are normal, it may be caused by a failure of the control part such as a hard disk recorder or a video distributor.

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