JVC TK-C921, TK-C920 operating instructions Lens Adjustment, Setting Switch, Specifications

G
						IRIS
						VIDEO
						DC
							L	H
							LEVEL
				LEVEL
							L H	LEVEL
							Av Pk	ALC	BF LOCK
					ALC
H								I
4
				1,5
J	8							8
	7
								7
	6
		OFF	ON-AGC					6	OFF	ON-AGC
		OFF	ON-AES						OFF	ON-AES
	5	OFF	ON-BLC						OFF	ON-BLC
		AUTO	MAMU	DC12V					AUTO	MANU
									LL	INT
		LL	INT					5
	4			AC24V	1	2			PHASE	WHT.
		PHASE	WHT.							BAL
			BAL		CLASS 2 ONLY(U TYPE)
	3	R	B		ISOLATED POWER ONLY			4	R	B
						(E TYPE)
					VIDEO OUT						VIDEO OUT
	2
					SEE INSTRUCTION			3			SEE INSTRUCTION
		POWER RESET			MANUAL				POWER	RESET	MANUAL
			1	TK-C920						1 TK-C921
K				U1-32					126
			50						115
					50 58		BF LOCK
	32.5								COLOR VIDEO CAMERA
			51
		TK-C920					30		1/4-20 UNC
				U1-32					126
			65						115
					55	62.5	BF LOCK
	35						DIGITAL		COLOR VIDEO CAMERA
			42					30	1/4-20UNC
		TK-C921
			®
											Printed in Thailand
											LWT0124-001B-H
VICTOR COMPANY OF JAPAN, LIMITED							©2004 VICTOR COMPANY OF JAPAN, LIMITED
® is a Registered Trademark owned by VICTOR COMPANY OF JAPAN, LTD.
® is a Registrated Trademark in Japan,the U.S.A., the U.K. and many other countries.

LENS ADJUSTMENT	∆G
Video adjust

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:

• LEVEL adjustment

Monitor screen	LEVEL turning direction
Too bright	Counterclockwise (Toward L)
Too dark	Clockwise (Toward H)

• ALC adjustment

Monitor screen	ALC turning direction
Part (high-intensity part) of the screen halates.	Clockwise (Toward Pk)
Other part of screen (except high-intensity part) darkens.	Counterclockwise (Toward Av)

*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, 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.

Back focus adjustment

The back focus has been factory-adjusted to the best point for CS-mount lens, but it ∆H may need to be re-adjusted if the mount is changed to the C-mount or if a different lens

is used. If required, adjust it as follows:

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 counterclockwise ( ) with a screwdriver.

2.Shoot a pattern closely.

3.Turn the lens focus ring to ∍.

4.Turn the back focus adjustment ring to focus at the best point.

5.Tighten the back focus locking screw by turning it clockwise ( ).

* When using a zoom lens, adjust the focus for telephoto wide-angle and maximum wide-angle.

SETTING SWITCH	∆I
White-spot correction

As a general characteristic unique to CCD, white spots may appear on the screen. Take the follow- ing steps in order to reduce the number of white spots.

1.Attach the lens cap, switch on the camera power supply and wait for 30 minutes.

2.Remove the sticker and press and hold the switch for more than 2 seconds using a thin rod. * Do not use a metal rod.

* The white-spot correction feature of this unit does not guarantee the correction of all white spots.

Line Lock (U type : 60Hz power region only E/EG type : 50Hz power region only)	∆J
To set the camera in LL mode for synchronization with the power supply frequency, take
the following steps:

1.Turn switch r to “LL”;

2.Turn switch e to “PHASE”;

3.Press the + or – button w to make the phase variable.

Adjust with the button w so that the vertical phase of the camera matches the vertical phase of

another camera (or system) with a multi-channel oscilloscope. For initial setting, press RESET button q.

White Balance

White balance can be adjusted within the scope of 2300K to 10000K color temperature. When switch t is at “AUTO”, the white balance is adjusted automatically.

*When Hunting Auto Tracking White Balance symptoms occur when using an Auto iris lens with switch positions of AGC is on, AES is on, Int-lock with AC24V Power source, turn switch r to “LL”.

*When Hunting Auto Tracking White Balance symptoms occur when using a Manual iris lens with switch positions of AGC is on, AES is on, Int-lock with DC12V Power source, please adjust or close iris ring on the lens.

For manual adjustment, take the following steps:

1.Turn switch t to “MANUAL”;

2.Turn switch e to “WHT.BAL”;

3.Pressing “R” button w increases redness while pressing “B” increases blueness. For initial setting, press RESET button q.

There are cases sometimes when the white balance cannot be adjusted manually for artifical lights such as fluorescent lights, etc.

BLC (Back Light Compensation)

The switch y improves an image that is darkened because of backlighting. Set this switch to ON for backlight subjects.

AES (Automatic Electronic Shutter)

Turning this switch u "ON" when a lens with a manual iris diaphragm is used enables the auto- matic adjustment of image brightness. In this case the shutter speed changes according to the brightness of the subject.

*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 i automatically increases the camera’s sensitivity when the level of ambient light drops.

ON: AGC is activated.

OFF: AGC is not activated.

SPECIFICATIONS

Image pickup device	: 1/3-inch interline-transfer CCD
Number of effective pixels	: TK-C920U	: 768 (H) ⋅ 494 (V)
Synchronization method	TK-C920E/TK-C921EG : 752 (H) ⋅ 582 (V)
	: Internal
Scanning frequency	Line lock (U type 60 Hz, E/EG type 50 Hz regions only)
	: U type	: (H) 15.734 kHz (V) 59.94 Hz
Resolution	E/EG type : (H) 15.625 kHz (V) 50 Hz
	: 535 TV line (H) Typ.
Video output	: Composite video signal 1 V (p-p), 751, unbalanced
Video S/N ratio	: 50 dB (AGC OFF)
Minimum required illumination : 0.7 lx (F1.2, AGC ON, 25%)
Lens mount	: C/CS mount
Power supply	: TK-C920U	: AC24 V ~ 60Hz DC12 V	4.7 W
and power consumption	TK-C920E	: AC24 V ~ 50/60Hz DC12 V		380 mA
Ambient temperature	TK-C921EG : AC220 V-240 V ~ 50/60Hz, 57 mA
	: –10˚C to 50˚C (operation)
Mass	0˚C to 40˚C (recommended)
	: TK-C920: 370 g
DIMENSIONS (Unit: mm)	TK-C921: 710 g

(Design and specifications are subject to change without notice.) ∆K