JVC VN-C655 manual  Consumable Parts,  Zooming operation

Models: VN-C655

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If this camera or cable connected this unit is used near a location where strong electrical or magnetic waves are generated (eg. radios, TVs, transformers, monitors, etc.), noise interference may occur in the image or its color may be affected.

When the AGC circuit is on, brightness of the screen may not change upon switching the Auto Iris mode (Normal, + or -) using the V.Networks Controller. This is due to the automatic gain boost feature that is activated. In this case, set AGC to OFF or use the manual iris mode.

Under certain brightness conditions, switching the Auto Iris mode (Normal, + or -) using the V.Networks Controller may not bring about any change in brightness. In this case, set the iris to the manual mode.

When this camera is used in the White Balance (ATW) mode, the colors captured may differ slightly from the actual colors due to the operational principles of the auto-tracking white balance circuit. This is not a malfunction.

When shooting a bright object (eg. lamps, etc.), white vertical streaks may appear on the object on the screen. This is a phenomenon (smear phenomenon) normal to CCDs (solid-state image pickup devices) and is not a malfunction.

When the camera is used to monitor the same position over prolonged hours (such as 24 hours of continuous monitoring), contact resistance of the panning mechanism may increase. This may cause noise interference in the image or unstable operation of the V.Networks Controller. To prevent this from occurring, turn the power of the system off and on again (to initialize camera) once a week and clean the contacts.

The dome cover is hemispherical in shape, and therefore images tend to be distorted at the edges of the hemisphere. The edges of the hemisphere is masked for this camera. When the camera is tilted and pointed in the horizontal direction, therefore, edges of the hemisphere may enter the angle of view, hence causing the upper end of the screen to appear dark and the image to go out of focus.

When shooting an object that is near a light source (eg. lightings) or with a large difference in brightness, ghosting may occur on the screen. This phenomenon is due to the characteristics of the dome cover and built-in lens and is not a malfunction.

Ensure to use the Converter Unit that has been supplied.

When playing back images by connecting a coaxial cable to the VIDEO OUT terminal, the image on the screen may appear shaky (rotational motions are not smooth) when using the Manual or Auto Pan operation particularly near the Tele end. This phenomenon is due to the characteristics of the motor and is not a malfunction.

Certain hubs/switches that are equipped with the SNMP feature may come with a broadcast or multicast control function. Proper viewing of multicast images created by this camera may not be possible if this function is enabled.

Do not touch the dome cover with your hand. This may dirty the cover and cause the image quality to deteriorate.

To clean the camera.

¥Do so upon turning off the power.

¥Use a lens cloth (or paper) to remove dirt from the dome cover. The camera may acquire dirt over a short period of time, depending on the environment of use.

When there is excessive dirt, wipe using a lens cloth (or paper) upon wetting it in a neutral detergent diluted with water.

Do not connect cameras other than VN-C655 to the ceiling mount. Doing so may cause the camera to malfunction.

Consumable Parts

The following parts are consumable. Please replace them accordingly after a certain number of hours or count of operations. The service lives given below are only reference values and may vary according to the operating environment and conditions. Note that replacement of consumable parts is chargeable even within the warranty period. ¥ Zoom lens assembly

Zooming operation

: 2 million times

Focusing operation

: 4 million times

¥ Slip rings

: Approx. 5 million

 

operations

¥ Cooling fan

: Approx. 30,000 hours

Zooming operation

Focus may deviate slightly upon stopping of a zoom operation near the Tele end manually or using a preset selection.

In addition, the manual zooming operation may not always be smooth.

These phenomena are due to the characteristics of the built-in lens and are not malfunctions.

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JVC VN-C655 manual  Consumable Parts,  Zooming operation