Possible reasons: the power supply is not stable;Processing method: detection system power supply, see whether stable, adequate.Possible reasons: extension problem;Processing method: to see the extension of the contrast and brightness adjustment is normal.Possible reasons: the video signal is not stable;Processing method: using the multimeter detection system signal, to see whether stable, adequate; special circumstances under building visual intercom system used alone video distribution amplifier. Please check the video distribution amplifier regulator, adjust is normal.
Date:
2016
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08
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12
Views：6
Possible reasons: wiring is not reasonable;Treatment methods: strictly in accordance with the relevant provisions of the weak current system, and according to the requirements of the system specification wiring, far away from the strong electricity, it is best to use the shielded wire.Possible reasons: poor contact;Methods: in strict accordance with the norms of weak electricity wiring, wiring.Possible reasons: the system video signal is insufficient, is not normal;Processing method: use a video amplifier.Possible reasons: the system signal is stronger or the impedance does not match;Processin...
Date:
2016
-
08
-
12
Views：5
Possible reasons: the whole building visual extension no image, check the door machine video output V+.G. to a level video amplifier, input terminal is divided into positive and negative answer, video amplifier is connected power supply, pay attention to; input and output port can not take the wrong;Processing method: the video amplifier connected to the power supply, the correct answer to the input and output video line.Encounter such problems, first consider the VB+ line (check the host and the extension of the line is correct, the line is in line with the standard).
Date:
2016
-
08
-
12
Views：4
Possible reasons: check the power supply to the indoor machine 18V visual power through the circuit is not connected to the wrongProcessing method: correctly connect the power supply - indoor machine power line.* Note: first to detect the video line of indoor machine, and then detection of power. Furthermore the extension whether a malfunction has occurred investigation and analysis
Date:
2016
-
08
-
12
Views：5
Possible reasons: check the door machine to the extension line is connected, and the extension of the room number set is correct.Processing method: replace a good extension to see if it is normal; if not normal check wiring is correct.
Date:
2016
-
08
-
12
Views：5
Treatment method:The inspection system whether the interference source, the audio line is connected;?The check intercom host and extension is faulty, the host may be the speaker and microphone has a problem;You can also adjust the volume and other related methods.* Note: strictly in accordance with the relevant provisions of the weak current system, and according to the requirements of the system specification wiring, far away from the strong electricity, it is best to use the shielded wire.
Date:
2016
-
08
-
12
Views：8