JVC TK-C1481EG
Manual de Usuario

CONNECTION/INSTALLATION
Lens adjustment
Connect the camera according to the connection method, turn it on, display an image on the monitor, and check the image. The camera has been factory-adjusted to the best position, but it may need to be adjusted according to the object conditions or combination of lenses. If the image is unnatural, adjust it as follows: (Also read the instruction manual of the lens.)
LEVEL adjustment

Back focus adjustment
Back focus adjustment
Be sure to make back-focus adjustments when changing the lens mounting method or using a different lens. If required, adjust it as follows:
Back focus adjusting ring

� LEVEL adjustment
Monitor screen Too bright Too dark LEVEL turning direction Counterclockwise (Toward L) Clockwise (Toward H) Tighten Loosen
OCK BF L

� With a fixed-focus lens If the focus can not be adjusted correctly by rotating the lens focus ring, adjust the back focus as follows.

1. 2. 3. 4. 5.

Loosen the back focus locking screw by turning it counterclocckwise ( ) with a screwdriver. Shoot a pattern closely. Turn the lens focus ring to . Turn the back focus adjustment ring to focus at the best point. Tighten the back focus locking screw by turning it clockwise ( ).

ALC LEVEL

MEMO � If the sensitivity adjustment LEVEL is turned excessively to L, the sensitivity increases because of the AGC function of the camera, and the image looks grainy. � If the video iris lens is set to too low a level,

Av Pk L H

Back focus fixing screw (M2.6) Lens focus ring

ALC adjustment

(Does not operate.) MEMO Note that the lens cannot make ALC adjustments. Make ALC adjustments using the item AVERAGE: PEAK on the menu. ( Page 26)

malfunction such as the hunting phenomenon, in which the iris opens or closes unintentionally, may occur. In such a case, first set LEVEL potentiometer on the lens to the H (iris open) position then adjust it to the optimum level.

� With a zoom lens If the image is out of focus when zooming (telephoto wide-angle), adjust the camera as follows: 1. Loosen the back focus locking screw by turning it counterclocckwise ( screwdriver. ) with a

2. 3. 4.

Shoot a comparatively dark scene with thin lines. Set the lens to the maximum telephoto position, and adjust the lens focus. Set the lens to the maximum wide-angle position, and turn the back focus ring to adjust the focus. (Repeat steps 3. and 4. two or three times.) Tighten the back focus locking screw by turning it clockwise ( ).

MEMO When the subject is bright, the use of an ND filter permits more accurate back-focus adjustment. (The ND filter reduces the amount of incident light upon the lens equally over the entire range of wavelength.)

5.

E-20

E-21