Digital Video Recorder: User manual
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Possible reasons are as followed:
The image quality is too bad.
the reading program is wrong. Reboot up the DVR.
The data line of the hard disk is damaged.
The hard disk is damaged.
The hardware of the DVR is damaged.
8.
There is no audio signal in the surveillance window.
Possible reasons are as followed:
It is not an active tone arm.
It is not an active squad box.
The audio lines are damaged.
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:
Settings: the audio is not chosen.
The according channel is not connected with the video.
10.
The time is wrong.
Possible reasons are as followed:
Setting is wrong.
The battery is in bad connection or the voltage is too low.
The oscillation is damaged.
11.
The DVR cannot control the PTZ.
Possible reasons are as followed:
There is something wrong with the frontal PTZ.
The setting, connection or the installation of the PTZ decoder is not correct.
