CPcam CP-NVR-8CH User Manual page 89

1. RS-485 cable connection error, A, B ports are inversely connected;
2. PTZ decoder, protocol, baud rate, address are incorrect;
Parallel connect a 120Ω resistance to resolve signal reflex caused by too many PTZs on the line.
3.
4. The RS-485 on the DVR is defective
Blurred screen in preview mode
Possible reasons:
Please make sure your cameras match your video format selected in the General menu. E.g. camera is NTSC
standard but the DVR is PAL standard, the preview would be blurred.
Blurred screen in playback mode or failure to playback records
Possible reasons:
1. Procedure error, reboot the DVR
2. HDD error, test or change out the HDD
3. DVR hardware failure, contact your local supplier
Fail to connect DVR through network
Possible reasons:
1、check the physical network connection is correct.
2、check the DVR network configuration parameters.
3、check whether IP conflicts exist in network.
Download records can't be played
Possible reasons:
1 、Player installation error.
2 、The USB or HDD device has an error.
3 、Do not install graphic software later than DX8.1.
Internet Explore Crash
Possible reasons:
Close IE explore, enter into the tool bar
Diagram 9-4 IE tool bar