VDH-NK160
Hardware Manual
8
3.
Using sound-absorbing materials for decoration to reduce sound
reflections and improve the acoustic environment;
4.
Adjusting the layout of the microphone and speakers can reduce the
whistling.
F.
Q & A and Maintenance
1.
Q & A
Q 1.
After power on, NVR doesn’t work.
A: The possible causes:
1. Wrong power input
2. bad connection of power cable
3. Power error
4. Firmware update error
5. Disk error or cable problem
6. Front panel error
7. Main PCB board error
Q 2.
After power-on, NVR will restart after several minutes or the screen
freezes.
A: The possible causes:
1. Unstable or low input voltage
2. The hard drive has bad sectors or cable error
3. Low adaptor power
4. Front video signal not stable
5. High temperature, too much dust and the machine runs in a bad
condition.
6. NVR hardware error
Q 3.
HDD not found after power-on
A : The possible causes:
1. No power for the Hard Drive
2. Hard Drive cable error
3. Hard Disk error