FAQ and Maintenance 117
It is not an active pickup.
It is not an active sound device.
Audio cable breaks down.
Hardware failure.
10.
Q: There is audio during monitoring, but no audio during playback.
A: This may be due to:
Setting issue: Audio is not enabled.
Corresponding channel is not connected with video. Playback is not continuous in
case of blue screen.
11.
Q: Time display is not correct.
A: This may be due to:
Wrong setup.
Bad contact or low voltage of the battery.
Bad crystal oscillator.
12.
Q: Device cannot control PTZ.
A: This may be due to:
Front-end PTZ failure.
Incorrect PTZ installation.
Incorrect wiring.
PTZ parameter setups in the device are incorrect.
PTZ protocol doesn’t match the device.
13.
Q: Motion detection function does not work.
A: This may be due to:
Period setup is incorrect.
Motion detection zone setup is incorrect.
Sensitivity is too low.
14.
Q: I cannot login client-end or web.
A: This may be due to:
ActiveX control has been disabled.
Network connection error.
Network setup error.
Username or password is invalid.
Client-end version is incompatible with program version. Clear C:\Program