GE Healthcare
Senographe DS
Revision 1
Service Information and Procedures Class A 2385072-16-8EN
Job Card ELE A043 - AWS Monitor Calibration
Page no. 753
Chapter 7
JC-ELE-A-043.fm
this adjustment).
9. Perform a Monitor backlight adjustment, as follows:
a. Stay in the
Brightness/Contrast
menu, and keep pressing the
Key1
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
Key2
/
Key3
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.
10. 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
11. Keep pressing the
Key4
button until
Accept changes
is selected, then press the
Key2
button to exit
and save the settings.
Measured lumniance
(on white level square)
Increasing contrast
(Inreasing value displayed on Monitor OSD)
Key2
Key2/Key3
buttons to find limit where
measured liminance is at the limit be-
tween not changing and increasing.