Dahua Technology XVR4 Series, Руководство пользователя

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FAQ 291
There are following possibilities:

HDD jumper is damaged.
 HDD is broken.

Upgraded program is not compatible.

The recorded file has been overwritten.
 Record function has been disabled.
7. Video is distorted when searching local records.
There are following possibilities:

Video quality setup is too low.

Program read error, bit data is too small. There is mosaic in the full screen. Please restart
the DVR to solve this problem.

HDD data jumper error.
 HDD malfunction.

DVR hardware malfunctions.
8. No audio under monitor state.
There are following possibilities:

It is not a power picker.
 It is not a power acoustics.

Audio cable is damaged.
 DVR hardware malfunctions.
9. There is audio under monitor state but no audio under playback state.
There are following possibilities:

Setup is not correct. Please enable audio function.

Corresponding channel has no video input. Playback is not continuous when the screen is
blue.
10. System time is not correct.
There are following possibilities:

Setup is not correct.

Battery contact is not correct or voltage is too low.
 Crystal oscillator is broken.
11. Cannot control PTZ on DVR.
There are following possibilities:

Front panel PTZ error.
 PTZ decoder setup, connection or installation is not correct.
 Cable connection is not correct.

PTZ setup is not correct.
 PTZ decoder and DVR protocol is not compatible.

PTZ decoder and DVR address is not compatible.
 When there are several decoders, please add 120 Ohm between the PTZ decoder A/B
cables furthest end to delete the reverberation or impedance matching. Otherwise the PTZ
control is not stable.
 The distance is too far.
12. Motion detection function does not work.
There are following possibilities:

Period setup is not correct.
 Motion detection zone setup is not correct.