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Symptom Cause and remedial action
Reference
pages
Ring-shaped
reflections appear
in the four corners of
the images
These are caused by the reflections of the light between the lens
and the cover in front of the lens. Find a way of optimizing the
position of the lighting relative to the position of the unit, and
install and use the unit in a location where the reflections will not
occur.
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Something is wrong
with the coloring of
the pictures
Activate the ATW (Auto tracking white adjustment) function.
<Operations and
Settings>
P.24
In some situations, the proper colors may not be reproduced
using the ATW function.
In cases like this, proceed with the white balance adjustment.
<Operations and
Settings>
P.22 to 24
The pictures are too
light or too dark
Either select the auto setting for the iris or select the manual
setting and adjust the iris manually.
<Operations and
Settings>
P.16
The pictures may be dark if the video signal cables are too long
because this will cause signal attenuation.
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The subjects appear
distorted
If a subject has suddenly crossed in front of the camera, it may
appear slightly distorted because this camera uses a MOS image
sensor.
This is normal and not indicative of any problem.
–––
When the flash is fired
during shooting, only
the top or bottom of
the screen becomes
lighter
With a MOS image sensor, the shooting timing differs slightly
between the top left and bottom right of the screen. This means
that when the flash is fired, the bottom of the screen will become
lighter in the field concerned and the top will become lighter in
the next field.
This is normal and not indicative of any problem.
–––
The brightness
changes cyclically or
the colors change,
and horizontal stripes
can be seen passing
across the screen
These phenomena (flicker) may occur under the illumination
produced by fluorescent lighting, mercury bulbs or other types of
discharge tubes.
This is normal and not indicative of any problem.
At a time like this, it is recommended that the electronic shutter
speed be set to 1/100 in areas with a 50 Hz power line frequency
or to OFF in areas with a 60 Hz power line frequency.
–––
When fine lines or
cyclical patterns are
shot, flickering is seen
or coloring is added to
them
This phenomenon occurs because the pixels are arranged
systematically on each image sensor. It is noticeable when the
spatial frequency of a subject and the pixel pitch are brought into
proximity so change the camera angle or take other such action.
–––
Troubleshooting