Philips PCA646VC Installation Manual page 21

Q: No audio (USB timer outside specification).
A: If you cannot hear any audio, and have tried every troubleshooting tip
in the user guide and the on-line help to no avail, the USB hardware in
your computer may be the cause of the problem. In most cases it will
be the USB timer clock that is not stable enough for streaming audio
applications.
Q: System lockup: My camera stops responding (black or frozen
picture or LED off) for no obvious reason.
A: Switch off the Hardware Accelerator of your video card (click on:My
computer, right mouse button/properties/Performance tab/Graphics
button,Set "Hardware Acceleration" to "None").
Contact your video display card manufacturer to obtain the latest
video card drivers. See the video display card's documentation for
more information.
Q: Picture Flicker: My video picture is flickering.
A: This could happen in office environments with 50Hz fluorescent
lighting in combination with certain framerates.There are two
solutions:
1. Check the 'Flickerless' button.This button is located in the
'WhiteBal./Exposure' property page.This property page is accessible
from within the application you are using.
2. Uncheck the 'Flickerless' button. Only the framerates '5','10' and '20'
are flickerless.
Q: I see picture quality distortion at 3.75 frames/second. (USB
timer outside specification).
A: When streaming video at a frame rate of 3.75 frames/second, you may
experience distortion of the video picture.This is being caused by the
USB hardware in your computer. In most cases, it will be the USB
timer clock that is not stable enough for streaming video applications.
Use a higher frame rate to avoid picture distortions.
Q: 'Unable to draw this data format':The message 'Unable to
draw this data format' appears.
A: This can happen when the selected stream format (I420) could not be
processed due to a missing codec. Re-install the camera driver
software to install the missing codec.
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