TBK vision TBK-BUL4431EIR, User Manual

Page: 19 / 20

TBK HD TVI Camera Series
18
www.tbkvision.com
Appendix: FAQ
Q : No picture with power on
A : It may result from abnormal power supply. Please check if the
power supply voltage and its polarity are correct. Besides, please
confirm if wires connection and monitors are normal.
Q: Unclear image output
A: It is caused by incomplete adjustment of the lens back focus.
Loose the fixed screw of the lens until it turns clear. If not, please
check if the lens is in good condition, or the lens surface and
sensor surface exits foreign objects. If exits, it can be wiped by
degreasing cotton swab or lens paper.
Q : Horizontal interference fringes on image
A : This phenomenon is generally caused by too strong hum bar of
power supply, which needs to be filtered out. It may also be
related to the used monitor or peripheral devices.
Q : Constantly change of the ground color of image
A : This phenomenon is caused by color scrolling, which is mainly
due to alternating electromagnetic field of fluorescent lamp, and
the inherent phenomenon of camera. It can be weakened with
two methods: one is to reduce the usage of fluorescent lamp. The
other is to enlarge the distance with the camera.