Sony DXC-190 Service Manual page 10

English
Features
This DXC-190 color video camera is equipped with a 1/2type Exwave
HAD™ * (Exwave Hole-Accumulated Diode) CCD (Charge Coupled Device),
and also has the following features:
• High sensitivity (Minimum illumination: 0.8 lux, F 1.2)
• CCD-IRIS function
• Automatic white balance tracking and adjustment
• 8-level electronic shutter
• External synchronization
• Auto-iris lens controlled by video signal or DC power supply
• Automatic backlight compensation through Smart Control™ * (operates
when AGC switch is in the "ON" position)
• Power multiplex feature
* Exwave HAD™ and Smart Control™ are registered trademarks of Sony
Corporation.
Notes on Use
Power supply
The DXC-190 must always be operated with a DC 12 V power supply * or
the CMA-D2 camera adaptor (not supplied), the YS-W170/W270 camera
adaptor (not supplied).
* In the U.S.A., use a UL-listed class 2 power supply. In Canada, use a
CSA-certified Class 2 power supply.
Handling
Be careful not to spill water or other liquids on the unit, or allow combustible or
metallic objects to fall inside the body. If used with foreign matter inside, the
camera is liable to fail, or be a cause of fire or electric shock.
Operation and storage locations
Avoid aiming the camera at very bright objects such as the sun or electric
lights for an extended period. Avoid operating or storing the unit in the
following locations.
• Extremely hot or cold places (operating temperature –10 °C to + 50 °C
(14 °F to 122 °F))
• Damp or dusty places
• Where it is exposed to rain
• Where it is subject to strong vibration
• Close to generators of powerful electromagnetic radiation such as radio or
TV transmitters.
• Where it is subject to fluorescent light reflections
• Where it is subject to unstable (flickering, etc.) lighting conditions.
Care of the unit
• Remove dust or dirt on the surface of the lens or CCD with a blower.
• Use a dry, soft cloth to clean the body. If it is very dirty, use a cloth
dampened with a small quantity of neutral detergent, then wipe dry.
• Avoid using volatile solvents such as thinners, alcohol, benzene, and
insecticides. They may damage the surface finish and/or impair the
operation of the camera.
Other
• When using automatic backlight compensation, hunting may occur.
• If you use the CCD-IRIS function in locations where the camera is
exposed to fluorescent light, a slow color change may occur.
• If AGC is turned on while in the TURBO mode, bright objects may be colored.
In the event of any problems with the operation of the camera, contact your
Sony dealer.
1-2
Location and Function of Parts
Top/Front/Side
1 Flangeback adjustment ring and locking screw
Use this ring to adjust the flangeback (the distance between the lens
mounting plane and the image plane).
Use the locking screw to lock the focal length.
2 Tripod adaptor
The tripod adaptor can be attached to either the top or bottom of the
camera using the four attached screws (1/4" UNC-20, length = 4.5 ±0.2
mm).
3 AGC (automatic gain control) ON/OFF switch
The automatic gain function automatically adjusts picture gain in
accordance with the brightness of the subject.
4 Gain up switch
Switching the Gain up switch to the TURBO mode while the AGC switch 3
is on increases gain by up to 6 dB over the NORM (normal) mode.
5 BLC (backlight compensation) ON/OFF switch
When switched on, this function adjusts exposure to compensate for
situations where the subject is lit from behind.
6 SHUTTER ON/OFF switch
Turning the switch on enables the 8-level electronic shutter and the CCD
IRIS.
7 White Balance Mode switch
AWB (Auto White Balance): Set WHT BAL A to 1; B to 1.
The LOCK button qf can be used in this mode. This switch sets the
appropriate white balance if the adjustment setting has been set in the
memory.
5600 K (Fixed mode): Set WHT BAL A to 0; B to 1
White balance mode for daylight.
ATW (Auto Tracing White balance): Set WHT BAL A to 1; B to 0.
The camera automatically adjusts the white balance according to the color
temperature of the light source. This is particularly effective if the white
balance is not functioning in the ATWpro mode.
ATWpro (Auto Tracing White balance Pro): Set WHT BAL A to 0; B to 0.
The unit automatically adjusts the white balance according to the color
temperature (2500 K–6000 K) of the light source.
8 Aperture switch
Set in the "SHARP" mode to sharpen the outline and produce a clearer
picture.
9 0–180 switch
When VBS is locked, you can change the range by adjusting the subcarrier
phase.
0 Shutter Speed/CCD IRIS Mode switch
By setting the rotary switch, you can set the shutter speed (0–7) and the
CCD IRIS mode (8, 9). If the SHUTTER ON/OFF switch 6 is OFF, this
switch is disabled.
0:1/60, 1:1/100, 2:1/250, 3: 1/500, 4:1/1000, 5:1/2000, 6: 1/4000,
7: 1/10000, 8: Normal CCD IRIS function, 9: CCD IRIS with forced backlight
compensation
qa AE SPOT switch
By setting the rotary switch (0–7), you can set the image frame for the
automatic exposure control. (See Illustration C. The shaded part indicates
the image frame that has been set.)
0: Whole screen, 1: Center (small), 2: Lower left, 3: Lower right,
4: Center (bottom), 5: Upper left, 6: Upper right, 7: Center (Large)
When an image frame is selected (1–7 on the rotary switch), the frame is
displayed for 1 second on the monitor screen. The rotary switch settings 8
and 9 have the following function (the image frame mode is fixed to Full
Screen):
8: Forced backlight compensation, 9: Excessive forward light compensation
qs PHASE volume
You can adjust the horizontal/vertical phase shift.
qd SC PHASE (Sub Carrier Phase) volume
With the 0–180 switch 9, you can adjust a burst phase shift when VBS is
locked.
Note
If you use the camera with multiplexed power sources, you cannot lock
VBS. You can lock VS with the multiplexed power sources.
qf AWB LOCK button
If the White Balance Mode switch 7 has been set to AWB, and if the all of
the monitor screen displays a white object, this button automatically adjusts
the white balance according to the color temperature of the light source; the
adjustment setting is saved in the memory.
Illustration A
DXC-190