JVC TK-C655 - Manual (Page 6)

6
● To save energy, turn the system off whenever it is not in
use.
● This camera has been designed for indoor use. It cannot
be used outdoors.
● This camera has been designed to be hung from a ceiling,
do not install it in an upright position on a surface or at an
angle, as this may cause a malfunction or a noticeable short-
ening of its service life.
● Do not install or use the camera in the following locations.
• In a place exposed to rain or water. (The waterproof char-
acteristics of the camera for TK-C676 are equivalent to
IEC 529.)
• In a place containing vapor or oil soot, for example in a
kitchen.
• In a place outside the operating temperature range (-10°C
to 50°C).
• Near a source of strong radio waves or magnetism, ra-
diation or X-rays.
• In a place where corrosive gassed are generated.
• In a place subject to vibrations.
• In a place with excessive dust.
● Insufficient ventilation of the camera may cause a malfunc-
tion. Be careful not to block ventilation to the camera.
This unit radiates heat from the panel surfaces (top panel
and side panels). Do not install it in a place where a heat
pool may form, such as near a wall.
● Do not install the camera in a place exposed to cold air, for
example near to the air outlet of an air conditioner. Other-
wise, moisture may become condensed inside the dome
cover.
● Do not point the lens at a strong light source, for example
the sun, doing so may cause the camera to malfunction.
● The camera incorporates an AGC circuit. As a result, when
it is used under low light conditions the camera gain may
increase automatically. This makes the picture appear un-
even , however this is not a malfunction
● When equipment that generates strong magnetism such
as a transceiver is used near to the unit while the AGC
circuit is ON, beat noise, etc may interfere with the picture.
If a transceiver or similar equipment is used keep it a dis-
tance of at least 3 meters from this unit.
● In auto iris mode, when the AGC circuit is ON, varying the
iris with the iris control button may not change the picture
brightness. This is due to the automatic gain boost by the
AGC circuit. In this case, set AGC to OFF or use the manual
iris mode.
● In auto iris mode, the iris control button may not function
under certain brightness conditions (i.e. when a sufficient
amount of light cannot be obtained). In this case, set the
iris mode to manual.
● When the camera is used in ATW (Auto White balance)
mode, the colors captured by the camera may differ from
the actual colors being shot due to the mechanics of the
auto-tracking operation within the white balance circuit.
However, this is not a malfunction.
● If a very bright object (such as a lamp) is being monitored,
the picture may contain vertical lines (smear) above and
below the bright object in the picture. This is a phenom-
enon normal to a solid-state image pickup devices (CCD)
and is not a malfunction.
● The electronic shutter speed of the camera has been set
to 1/50 second at the factory. If the camera is used under a
fluorescent light source in an area with a local power fre-
quency of 60 Hz, change the shutter speed to 1/120 sec-
ond using the remote control unit. (Note that the sensitivity
will deteriorate slightly.)
However, when the ExDR function is ON, the flicker may
not disappear.
● When the camera is used to monitor the same position over
many hours ( e.g. continuously for 24 hours a day) the con-
tact resistance of the panning mechanism may increase.
This may cause the picture to be affected by noise interfer-
ence or the remote control operation becoming unstable.
To prevent this happening, once a week, turn the system
off and on in order to initialize the camera and to clean the
contacts.
● Do not touch the lens on the dome cover directly by hand.
Contamination of the cover will lead to deterioration of the
picture quality.
● Since the dome cover is of a hemispherical shape, the pic-
ture tends to become distorted at the edges of the hemi-
sphere. When the camera is tilted and pointed in the hori-
zontal-direction, the picture may be out of focus because
the camera will then capture the edges of the hemisphere.
● When an object is located near a light source or contains a
large difference in brightness, a ghost may interfere with
the picture. This phenomenon is due to the characteristics
of the dome cover and the built-in lens and is not a mal-
function.
● Observe the following points when carrying out mainte-
nance of the camera.
• Turn the system off before proceeding.
• Clean the dome cover using a lens cleaning cloth (or tis-
sue).
The dome cover may become stained in a very short
period in certain operating environments. If the dome
cover lens becomes excessively contaminated, clean it
with a lens cleaning cloth (or tissue) moistened with a
solution of neutral detergent in water.
Precautions for Correct Operation
Introduction