Prosonic DVR Informations techniques télécharger pdf (Page 86)

Digital Video Recorder

(II) Image display/monitoring

1. Why the images in monitor or TV set are black and white?

Check whether the systems of video input, DVR and monitor or TV set are uniform. If not, select “Auto” for monitor or

TV set.

2. Why the monitor doesn’t display anything?

① There is a black screen process (about 30 seconds) when the DVR is starting; ② If there is no image displayed when the

DVR is started for a long time (more than 60 seconds), please check whether the monitor is turned on and whether the

video cable is connected properly. If there is no problem, please check whether the VDF display on front panel of DVR is

lit; if it is normal, the system communication is normal. Then, connect the video signals to the monitor directly to check

whether there is signal and whether the circuit has fault.

3. Why the images are distorted?

① Check whether the video connection is short circuit or open circuit, or has false welding or poor connection; ② Video

cable is interfered with by strong electricity; do not install the video cable and the strong electricity circuitry together and

also choose qualified shielded cable; ③ In the whole system, connect only the center DVR to earth; otherwise, it will cause

common mode interference; connect the grounding screw at the rear side of DVR to earth; ④ Check whether the DVR,

monitor or the circuitry is aged.

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Prosonic DVR Informations techniques Page 86