ViewSonic VB-VIS-002 User Guide English - Page 26

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. 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. 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. The arm is loose. Use two coins to tighten the arm screws if the arm is loose. The image is flicker Before Setting After Setting (Horizontal noises) (Normal) 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_ electricity_by_country Use the vDocCam software "Device setup" item to change the camera's refresh rate. Flicker settings reference Area England Germany France Italy Setting 50HZ 50HZ 50HZ 50HZ Area Portugal America Taiwan Setting 50HZ 60HZ 60HZ China 50HZ Spain 50HZ Japan 50/60HZ Russia 50HZ Korea 60HZ Note: The contents in this manual are subject to change without prior notification. 26