Q-See QC40198 - Manual (Page 136)

TROUBLESHOOTING
QC40198 User Manual
127 | P a g e
Daily Maintenance
 The device needs to be soundly grounded to avoid audio/video disturbance. Keep the device away from
static electricity or induced voltage.
 Unplug the power cable before you remove the audio/video signal cable, RS232 or RS485 cable.
 Always shut down the device properly. Please use the shutdown function in the menu, or you can press the
power button on the front panel for at least three seconds to shut down the device. Otherwise it may result
in hard drive malfunction.
 Make sure the device is away from direct sunlight or other heating sources. Please keep the ventilation fans
clear.
 Please check and maintain the device regularly.