12 C2403M-E (2/08)
FOCUS ADJUSTMENT FOR FIXED FOCAL LENGTH LENS WITH AUTO IRIS
To adjust the focus, it may be necessary to remove the heater board in order to loosen the locking screw on
the bottom of the lens.
To remove the heater board:
1. Disconnect the 4-pin heater wiring.
2. Wait for the heater elements to cool if they are hot.
3. Press on an end of the board.
To adjust the focus:
1. Loosen the locking screw on the bottom of the lens.
2. Move the screw in the slot to bring the picture into focus.
3. Retighten the locking screw.
4. Replace the heater board if it was removed.
5. Reconnect the 4-pin heater wiring.
SWITCH SETTINGS FOR FIXED FOCAL LENGTH LENS WITHOUT AUTO IRIS
Refer to the switch position drawing. The switch is located next to the lens. Automatic backlight
compensation (factory setting) is used under varying lighting conditions (such as outdoors) or fixed lighting
conditions, where there are no bright spots that darken other picture details. Manual backlight
compensation is used in fixed lighting conditions to optimize the picture detail when there are bright
spots.
• ALC/ELC switch: Always ELC
• Y/DC switch: Not used
• Auto backlight compensation: BLC switch OFF
ABL switch ON
• Manual backlight compensation: BLC switch ON
ABL switch OFF

WARNING: Heater elements could be hot! When camera power is on, use caution when

adjusting the camera.

HEATER
BOARD
FOCUS
ADJUSTMENT SCREW
ADJUSTMENT SLOT
BOTTOM VIEW OF CAMERA
WITH HEATER BOARD REMOVED
NOT USED
= SWITCH POSITION
FACTORY SETTINGS
ALC
Y
BLC
ABL
ELC
DC
OFF
OFF