Qvis DVR series User Manual

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5). Real-time image problems such as the image color or the brightness
distortion.
Possible reasons are as followed:
 1 WhenusingtheBNCoutput,theoptionbetweentheNmodeorPAL
mode is wrong and the image becomes black and white.
2 The DVR is not matched the monitor impedance.
3 The video transmission distance is too far or the loss of the video trans
mission line is too large.
4 The color and brightness setting of the DVR is wrong.
6). I can not nd the video les in local playback mode.
Possible reasons are as followed:
1 The data line of the hard disk is damaged.
2 The hard disk is damaged.
 3 Updatethedifferentprogramwiththeoriginprogramles.
 4 Thevideolestolookuparecovered.
5 The recording is not on.
7). The local video is not clear.
Possible reasons are as followed:
1 The image quality is too bad.
2 The reading program is wrong. Reboot up the DVR.
3 The data line of the hard disk is damaged.
4 The hard disk is damaged.
5 The hardware of the DVR is damaged.
8). There is no audio signal in the surveillance window.
Possible reasons are as followed:
1 It is not an active tone arm.
 2 Itisnotanactivesoundbox.
3 The audio lines are damaged.
4 The hardware of the DVR is damaged.
9). There is audio signal in the surveillance window but no audio signal
in the playback state.
Possible reasons are as followed:
 1 Settingissues:theaudiooptionisnotchosen.
2 The according channel is not connected with the video.
10). The time is wrong.
Possible reasons are as followed:
1 Setting is wrong..
2 The battery is in bad connection or the voltage is too low.
3 The oscillation is damaged.
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Qvis DVR series Specifications

General

Brand	Qvis
Model	DVR series
Category	DVR
Language	English