JVC VN-H257VPU Benutzerhandbuch

Adjust images by watching them on the monitor.

* The illustration of the camera directly mounted on the ceiling is used. 

The same procedures are performed when mounting the camera on 
the wall with the cables pulled out.

Note

•  Before touching the camera body, make sure you touch the metal 

surface of the [MONITOR] terminal first to discharge any static 
electricity from your body.

  Otherwise, static electricity may cause the camera to malfunction.

1  Connect a test monitor to the [MONITOR] terminal.
2  After checking that the [MONITOR] selection 

75 Ω 

termination

Test 
monitor

[MONITOR] terminal

Memo

•  The camera has the 16:9 aspect ratio. If the test monitor has the 4:3 

aspect ratio, the camera image is converted into the 4:3 ratio and 
displayed.

•  Set to "NTSC" when connecting to an NTSC monitor, or set to "PAL" 

when connecting to a PAL monitor, then hold down the [RESET] 
button for approximately three seconds to reboot. While the camera 
is rebooting, the [STATUS] indicator lights up orange.

•  If you keep pressing the [RESET] button for more than 5s, the camera 

enters the Service mode. Do not press this button for more than 5s.

3  Adjust the shooting direction of the camera

Before you start, remove the light-blue protection tape.
Adjust the pan, tilt and rotation controls of the cameras to face the 
lens towards the subject.

Note

•  Moving the pan, tilt or rotation beyond the adjustment range may 

damage this unit.

•  As the tilt and rotation range of this unit is wide, part of this unit may 

be reflected in the shooting screen depending on the field angle and 
direction.

•  Do not hold the lens section when adjusting the direction of pan, tilt 

or rotation. The lens section may be damaged if you apply excessive 
force to it.

Pan: ± 175°

Tilt: ± 80°

Rotation: ± 100°

Shooting direction mark

[RESET] button

Rotation
knob (two 
locations)

Tilt fastening screw

[STATUS] indicator

[MONITOR] selection switch

NTSC

[FOCUS 
ASSIST] 
button

PAL

Protection 
tape

Memo

1  Adjust the zoom ratio.

Loosen the fastening screw of the zoom adjustment ring, then 
move the ring to the right and left to adjust the zoom ratio. After 
completing the adjustment, tighten the setscrew.

Note

•  Applying force to the zoom adjustment ring while adjusting the 

image size may result in damage.

  Moving the zoom adjustment ring beyond its adjustable range 

may cause the performance of this camera to deteriorate.

2  Roughly adjust the focus.

1

 Lift the focusing gear control, release the catch from position A 

and insert it into position B to disengage the gear.

Note

•  If you open the gear beyond position B, the gear shaft is 

released from the bearing (C in the figure on the left) to prevent 

it from being damaged. In this case, correctly re-insert the shaft 

into bearing A (the original position).

2

 Rotate the lens section at the tip to roughly adjust the focus.

2

Lens section

Note

•  Do not hold the lens section when adjusting the direction of the 

camera. The lens section may be damaged if you apply force to 

it. Also, exercise care not to leave your finger prints on the lens 

when you rotate the lens section.

3

 Return the catch of the focus adjustment gear to B position A 

shown in the diagram, and then return the focus adjustment 
gear to its original position.

2

 Loosen the focusing ring setscrew and roughly focus the image 

by rotating the ring to the right or left.

3

 Return the catch of the focus adjustment gear to B position A 

shown in the diagram, and then return the focus adjustment 
gear to its original position.

3  Finely adjust the focus.

1

 Connect the camera to a computer, and open the Built-in Viewer.

• For details about computer settings and methods for 

connecting the camera to a computer, refer to “Instructions (IP 
Address Settings)”.

2

 Select “Day Focus Adjust” from the “Focus” page in “Advanced 

Settings”.
• The focus position is automatically adjusted.
• For details on focus, refer to “Instructions (Setting)” on the 

supplied CD-ROM.

• You can also adjust the focus after mounting the dome cover.

1

 Press the [FOCUS ASSIST] button.

• The camera enters Focus Assist mode, and [STATUS] 

indicator flashes green and orange alternately.

• The image is sharpened with the opening of the aperture.

2

 Finely adjust the camera focus by rotating the focus adjustment 

gear knob to the right or left.

3

 Rotate the focus adjustment gear knob for approximately one 

base pitch in the direction of the arrow shown in the figure.
• This is to correct the focus shift when mounting the dome cover.

4

 Remove the protective sheet of the dome cover, and check the 

camera focus by holding the dome cover over the lens.
• After checking, replace the protective sheet on the dome cover.

5

 Tighten the setscrew of the focus adjustment ring and fix the focus.

6

 Press the [FOCUS ASSIST] button.

• The Focus Assist mode will be released.
• [The STATUS] indicator lights up green.

Note

•  It may be difficult to acquire focus automatically when shooting 

the following places.

–  Too bright places.

–  Too dark places.

–  Places where brightness always changes. (e.g. a light is 

flickering; people are passing by in front of the camera.)

–  Places where there is little contrast of brightness.

–  Places where there are repeating patterns of vertical stripes.

Memo

•  The focus position can be manually adjusted by using the Built-

in Viewer installed on your computer connected to the camera. 

(

☞

 “Instructions (Setting)”) Resort to this method if it is difficult 

to acquire focus automatically.

☞

 Continued overleaf

Engage the inner dome slot with the projection, and mount 
the dome by rotating it in the direction of the arrow. Press 
the inner dome in until you hear the click of the catch.

Catches
(two locations)

Inner 
depression

Protruding 
part

Inner dome

Align the position aligning marks (three locations) on 
the camera body and the dome cover, mount the dome 
cover and secure it using the supplied wrench.

Position aligning mark

(three locations)

Dome cover

Dome cover protective sheet

Position aligning mark

After all connections and installations are completed, 
turn on the power of the unit. When the camera is 
booting, the [STATUS] indicator lights up orange. It lights 
up green after booting.

When you mount the dome cover, make sure that no cables are connected to the [MONITOR] terminal.

Note

•  Before installing the dome cover, make sure that silica gel (supplied) 

is placed inside.

•  Mount the dome cover firmly. If it is not fixed securely enough, the 

moisture inside the camera increases, fogging the inside of the cover 
or causing the cover to fall off.

•  If you remove the dome cover after installing it, the field angle may 

shift. If the field angle has shifted, adjust the focus and the field 
angle again.

•  Pay attention to the fall prevention wire so that it will not be caught 

between the dome cover and the camera. Otherwise, dust proofing 
and waterproofing may not work correctly.

Catches

* The VN-H257VPU camera is shown in the illustration.

B A

B A

Knob

Catches

Zoom 
adjustment ring

Zoom 
adjustment ring

Focusing ring

C

Focus 
adjustment gear

C

Focus adjustment gear

One base 

pitch

Tilt fastening 
screw

Protruding part

Wrench 
(supplied)

Dome cover

Dome cover 
protective 
sheet

Knob

•  Rotate the lens in the pan, rotation and tilt directions ± 175°, ± 100° 

and ± 80° respectively from the position aligned with the camera's 
shooting direction mark, pan center mark and rotation center mark. 
Be sure to hold the rotation control and adjust the rotation without 
holding the lens section.

•  When you mount the camera body, align the shooting direction mark 

within the shooting direction.

•  After adjusting the field angle, tighten the tilt fastening screw to secure 

the camera so that its field angle does not go out of alignment.

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5/24/2012   2:59:09 PM

5/24/2012   2:59:09 PM