Hitachi DK-H200 Operating Instructions Manual page 25

White and black balance adjustment
Auto black balance error messages
When auto black balance adjustment fails, the following error messages appear on the screen for
about 6 seconds.
Message
AUTO BLACK:NG
CHANGE TO CAM
TRY AGAIN
AUTO BLACK:NG
IRIS NOT CLOSED
TRY AGAIN
AUTO BLACK:NG
???
TRY AGAIN
Note1
 Observe that the lens connector is engaged and the iris is closed.
 The iris closes automatically to block the light during black balance adjustment.
 During black balance adjustment, the gain circuit is switched automatically.
 Although flicker or noise may appear on the screen, these are not malfunctions.
Note2
 The lens iris is automatically closed during black balance adjustment. If the iris control is manual,
open the iris after adjustment.
 Check the lens connection. If ok, fault is in the lens or the camera. Consult service.
Cause
The color bar signal is output.
The Iris is not closed.
Range is exceeded, cannot adjust.
13
Correction
Press the D button to turn off the color
bar signal.
See Note 1.
See Note 2.