Troubleshooting - ViewSonic VB-VIS-002 User Manual

Troubleshooting

When using the document camera :
Problem
Cannot be powered on normally.
No image output after connecting.
The image is fuzzy.
The image does not move.
The arm is loose.
The image is flicker
Before Setting
(Horizontal noises)
Note: The contents in this manual are subject to change without prior
notification.
Cause
The USB cable is not correctly
connected to the computer or the
computer may have crashed.
The document camera is not correctly
connected to the computer.
Software is not installed on the
computer.
Application software is incompatible
with the document camera.
Probably the distance of object is too
close to the lens.
The computer or application software
may have crashed.
Use two coins to tighten the arm
screws if the arm is loose.
Camera flickering problems usually
occur when there is a difference
between the camera refresh rate
setting and the artificial lighting
refresh rate of the environment.
For power voltage and frequency
information, please reference
https://en.wikipedia.org/wiki/Mains_
After Setting
electricity_by_country
(Normal)
Flicker settings reference
Area England
Setting
Area Portugal
Setting
Germany France Italy Spain
50HZ 50HZ 50HZ 50HZ 50HZ
America Taiwan China Japan
50HZ 60HZ 60HZ 50HZ 50/60HZ
26
Solution
Re-connect the USB cable with the
document camera.
Restart the computer.
Re-connect the USB cable with the
document camera.
Install the bundled software on the
computer.
Use the bundled software to operate
the document camera.
Press AF button to auto focus.
Restart the computer or application
software.
Use the vDocCam software "Device
setup" item to change the camera's
refresh rate.
Russia
50HZ
Korea
60HZ