Setup

Adjusting the lens

After the connection is complete, turn on the camera, display an image on the monitor and check the video image.

In the case of an automatic iris control lens, the camera has been factory- adjusted to the best position, but it may need to be adjusted according to the condition of the object or the lens combination. If the image is unnatural, adjust it.

Also read the instruction manual of the lens.

With a VIDEO automatic iris lens (Automatic iris control lens with built-in EE amplifier)

Set the switch at the side of the camera to AVIDEOB and adjust the LEVEL dial on the lens.

LEVEL adjustment

L H

LEVEL

Av Pk

ALC

 

DIGITAL

Do not operate

With a DC automatic iris lens (Automatic iris control lens without built-in EE amplifier)

Set the Iris Selector Switch at the side of the camera to ADCB and adjust the LEVEL with the Iris Level Adjustment Dial at the side of the camera.

 

IRIS

VIDEO

 

DC

 

COLOR VIDEO CAMERA

LEVEL

 

 

IRIS

 

Iris Selector

VIDEO

 

 

DC

 

Iris Level

Switch

 

 

 

 

Adjustment Dial

 

 

LEVEL

 

 

 

LEVEL adjustment

Monitor screen

LEVEL adjustment direction

 

 

To darken

Anti-clockwise (Towards L)

 

 

To brighten

Clockwise (Towards H)

 

 

Memo:

If the LEVEL sensitivity adjustment is turned excessively to L, the sensitivity increases because of the AGC function of the camera and the image looks grainy.

Depending on the lens used, if the LEVEL dial is turned excessively to L, the hunting phenomenon (floppy screen) where the iris opens and closes involuntarily may occur. In such a case, first set the LEVEL dial to the H position, and then readjust the LEVEL dial while checking the video signal.

To adjust the focus accurately, open the lens iris. Below is how to open the lens iris for automatic iris lens.

Press the [SELECTOR] switch on the back panel up (J) for 1 second. [FOCUS ADJUST MODE] is displayed on the monitor screen.

When the focus adjustment is completed, press either [SELECTOR] switch (J, K, H, K), [MENU] or [SET] button.

[FOCUS ADJUST MODE] display disappears and the lens iris returns to original state.

Connect the monitor TV to the VIDEO OUT terminal on the back panel and make adjustments.

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JVC TK-C925U, TK-C1530U, TK-C1530E, TK-C1531EG, TK-C926EG, TK-C925E manual Adjusting the lens,  Level adjustment

TK-C925U, TK-C925E, TK-C1530E, TK-C1531EG, TK-C1530U specifications

JVC has built a strong reputation for its advanced camera technologies, particularly in surveillance and monitoring applications. Among its extensive range, the models TK-C926EG, TK-C1530U, TK-C1531EG, TK-C1530E, and TK-C925E stand out for their impressive features and capabilities.

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