Sony DNW-7/7P Operation Manual page 82

The black balance adjustment ends in a few seconds with the
message "BLACK : OK," and the adjustment setting is
automatically stored in memory.
Notes
• During the black balance adjustment, the iris is automatically closed.
• During the black balance adjustment, the gain selection circuit is
automatically activated so you may see flickering on the viewfinder
screen, but this is not a fault.
4
If automatic black balance adjustment cannot be made
If the black balance adjustment cannot be completed normally, an error
message will appear for about 3 seconds on the viewfinder screen (in
display mode 2 or 3).
Possible messages are listed on the next page.
Error message
BLACK : NG
IRIS NOT CLOSED
BLACK : NG
R (or G or B) : TIME LIMIT
BLACK : NG
R (or G or B) : OVERFLOW
If any of the above error messages is displayed, retry the black balance
adjustment. If the error message occurs again, an internal check is
necessary.
Refer to the Maintenance Manual for information about this internal check.
Note
The black balance cannot be adjusted while the setup menu is displayed
on the viewfinder screen. Always set the MENU ON/OFF/PAGE switch
to OFF before starting these adjustments.
4-4
Chapter 4 Adjustments and Settings for Recording
Black balance adjustment error messages
Meaning
The lens iris did not close; adjustment was
impossible.
Adjustment could not be completed within
the standard number of attempts.
The difference between the reference value
and the current value is so great that it
exceeds the range. Adjustment was
impossible.