GE Healthcare
Senographe DS
Revision 1
Service Information and Procedures Class A 2385072-16-8EN
Job Card ELE A043 - AWS Monitor Calibration
Page no. 741
Chapter 7
JC-ELE-A-043.fm
adjustment).
6. Perform a Monitor backlight adjustment, as follows:
a. Stay in the
RGB
menu, and keep pressing the
MENU
button until
Backlight
is selected.
b. With the luminance meter positioned on the central white level square of the SMPTE pattern (see
the image in
), use the
UP
/
DOWN
buttons to adjust the
Backlight
value so that the
luminance of the white level meets the target luminance of 400 cd/m² ±10 cd/m².
7. Perform a grey-level visibility check on the SMPTE pattern, by checking that:
•
All the grey levels are visible
•
The "5%" square remains visible compared to the 0% square.
•
The "95%" square is visible compared to the 100% square.
If you do not have these results, repeat the calibration steps
8. Keep pressing the
SET
button until
Accept changes
is selected, then press the
UP
button to exit and
save the settings.
Measured lumniance
(on white level square)
Increasing contrast
(Inreasing value displayed on Monitor OSD)
Up
Up/Down
buttons to find limit where
measured liminance is at the limit be-
tween not changing and increasing.