JVC TK-C655 User Manual

Page 7

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7

Note on consumable parts

The following parts are consumable and should be replaced
after a certain number of hours or a count of operations.
The service lives given below are only typical values. They
may vary depending on the operating environment and con-
ditions.
Note that the replacement of consumable parts is charge-
able even when they are replaced before the termination
of the warranty period.
• Zoom lens assembly

Zooming operation

: 2 million times

Focusing operation

: 4 million times

• Slip rings

: 5 million operations

• Cooling fan

: Approx. 30,000 hours

• Alarm output 1 relay : 200,000 times of operation

Note on auto focusing

Although this unit incorporates a one-push auto-focusing
system and EASY AF functions, auto-focusing may some-
times be impossible depending on the object and camera
setup. In this case, adjust the focusing manually.

Objects and images with which auto focusing may be
difficult:
• When the image brightness is extremely high.
• When the image brightness is extremely low.
• When the image brightness varies continuously (for ex-

ample when the object is a flashing light).

• When the image contrast (difference between bright and

dark) is very poor.

• When the image does not contain a vertical contour com-

ponent.

• When vertical stripe patterns recur on the screen.

Camera setups with which auto focusing may be diffi-
cult:
• When the AGC is activated and the image is coarse.
• When SENSE UP is activated and the image contains

only little motion.

• When electronic zooming is activated and the image does

not contain a large enough contour component. (In the
case of TK-C676 only)

Zooming

When zooming is stopped near the TELE end during manual
operation or by selecting a preset position, focusing may
deviate slightly. 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.

Preset positions

• The zooming position of the camera can be set to a total

of 100 preset positions, including the home position.

• The electronic zoom can be preset up to x2.

However, if the electronic zoom menu on the screen is
set to OFF even presetting the electronic zooming to x2 ,
the camera itself moves to the preset position without the
electronic zooming being activated. (TK-C676 only)

• It is not permitted to preset the electronic zoom to a larger

ratio than x2. The message "INVALID POSITION
(D.ZOOM)" will appear on the screen if a larger ratio than
x2 is set. (TK-C676 only)

• The TILT position can be set and operated only between

0° to 90° even when the item “FLIP” is set to DIGITAL.
(A TILT position between 91° and 180° cannot be set or
operated. The message "INVALID POSITION (TILT) will
appear on the screen if a larger TILT position than 90° is
set. )

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