JVC TK-C750U(A)
Manual de Usuario

LENS ADJUSTMENT

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63 59 55 50
IRIS
L H

Video adjust
A readjustment might be necessary depending on the configuration of the shooting object or the lens installed. To perform a readjustment, the AGC switch on the back of the unit should be turned OFF before adjusting the LEVEL. Turn the AGC on again when the adjustment has been completed. � LEVEL adjustment Monitor screen Direction of Rotation of LEVEL control
Too bright Too dark Anti-clockwise, towards L (Low) Clockwise, towards H (High)

LEVEL

COLOR VIDEO CAMERA

LEVEL

� If the sensitivity adjustment LEVEL is turned too far to L, the sensitivity will increase due to the AGC function of the camera, making the image look grainy.

Back focus adjustment

H
4

Back focus has been optimally adjusted at the factory for CS-mount lenses, but it may need re-adjustment if the mount is changed for C-mount lenses. If required, adjust as follows:

�H

1,5

� 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. Loosen the back focus locking screw by turning it anti-clockwise ( ) with a screwdriver. 2. Point the camera at a test pattern. 3. Turn the lens focus ring to '. 4. Turn the back focus adjustment ring to find optimum focus. 5. Tighten the back focus locking screw by turning it clockwise ( ). � With a zoom lens If the lens does not track (loses focus) at any point in the zoom range, adjust as follows: 1. Loosen the back focus locking screw by turning it anti-clockwise ( ) with a screwdriver. 2. Point the camera at a comparatively dark scene with thin lines. 3. Set the lens to the maximum telephoto position, and adjust the lens focus. 4. Set the lens to the maximum wide-angle position, and turn the back focus ring to adjust the focus. (Repeat steps 2 and 3 two or three times.) 5. Tighten the back focus locking screw by turning it clockwise ( ).

I

6 5 4 3 2 1 7

6 5 4 3 2 1 7

SETTING SWITCH (The illustration shows the factory-set default settings.)
Line Lock

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To set the camera in LL mode for synchronization with the power supply frequency, do the following : 1. Turn switch 2 to �LL�; 2. Press the + or � button 1 to make the phase variable. Adjust with the button 1 so that the vertical phase of the camera matches the vertical phase of another camera (or system) with a multi-channel oscilloscope. To reset the setting, press the + and � buttons 1 simultaneously. U type : 60Hz power region only E/EG type : 50Hz power region only

TK-C750

TK-C751

White Balance

J [: mm]

50

U1-32

126 115

White balance can be adjusted within the scope of 2300 K to 10000 K color temperature. When switch 3 is at ATW (Auto-Tracking White Balance), the white balance is automatically adjusted according to the color temperature of the ambient illumination. When the white balance is set to AWB (Auto White Balance), press and hold the SET button 7 for 2 seconds to adjust or readjust the white balance. Once the white balance is adjusted, the setting will not track changes in the color temperature of the ambient illumination.

BLC (Back Light Compensation)
BF LOCK

32.5

The switch 4 helps to rectify the situation where a subject appears dark because of backlighting. Set this switch to ON for strongly backlit subjects.
COLOR VIDEO CAMERA

AES (Automatic Electronic Shutter)
Turning this switch 5 �ON� when a lens with a manual iris diaphragm is used enables the automatic adjustment of image brightness. In this case the shutter speed changes according to the brightness of the subject.

41.5

TK-C750

30

1/4-20 UNC MOUNTING HOLE

Hunting may occur at a certain object brightness due to the mechanism of the AES circuit, but this is not a fault.

AGC (Automatic Gain Control)
The switch 6 automatically increases the camera�s sensitivity when the level of ambient light drops. ON: AGC is activated. OFF: AGC is not activated.

SPECIFICATIONS
65 U1-32 125 115

DIGITAL

42 30

TK-C751

1/4-20 UNC MOUNTING HOLE

: 1/3-inch interline-transfer CCD TK-C750U : 510 (H) = 492 (V) TK-C750E/TK-C751EG : 500 (H) = 582 (V) Synchronization method : Internal Line lock (U type: 60 Hz, E/EG type: 50 Hz, regions only) Scanning frequency : U type : (H) 15.734 kHz, (V) 59.94 Hz E/EG type : (H) 15.625 kHz, (V) 50 Hz Resolution : 330 TV line (H) Typ. VIDEO OUT : Composite video signal 1 V(p-p), 75 1, unbalanced Video S/N ratio : 50 dB (AGC OFF) Minimum required illumination : 0.28 lx typ (F1.2, 25%), 0.55 lx typ (F1.2, 50%) Lens mount : C/CS mount Power supply : TK-C750U : AC 24 V ` 60 Hz, DC 12 V }, 3.3 W and power consumption TK-C750E : AC 24 V ` 50 Hz/60 Hz, DC 12 V }, 270 mA TK-C751EG : AC 220 V - 240 V ` 50 Hz/60 Hz, 42 mA Ambient temperature : �10 �C to 50 �C (operation) 0 �C to 40 �C (recommended) Mass : TK-C750 : 340 g TK-C751 : 680 g Provided accessory : WARRANTY CARD (TK-C750U only) ... =1 DIMENSIONS (Unit: mm) (Design and specifications are subject to change without notice.)

Image pickup device

35

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is a registered trademark owned by Victor Company of Japan, Limited. is a registered trademark in Japan, the U.S.A., the U.K. and many other countries. Printed in Thailand LST0264-001A-H

© 2005 Victor Company of Japan, Limited.