Part I Service Scenarios
Installation 16
1.2.4 Equipment Adjustment
1.2.4.1 Brightness and Contrast
Monitor brightness and contrast adjustment is one of the most important factors for proper image
qualities, if set incorrectly, the gain, TGC, dynamic range or even output power have to be changed
more often than necessary to compensate.
On the main screen, choose Setup > General > DISPLAY. Select LCD and TouchPanel and set the
brightness and contrast of the display and touch screen. Alternatively, select Brightness auto adjustment,
and the system will automatically adjust the brightness and contrast on the main screen and touch screen
based on the ambient conditions.
1.2.4.2 Monitor Test
1. Log in as user Service. For details about login, see Part I Service Scenarios: 2.3.2Logging In with
the Service Account.
2. On the main screen, choose Setup > Maintenance > Setup. On the Set screen, tap Test Main
Monitor. On the main monitor test screen, test the following items.
No. Item Description
1. Contrast The screen displays a white strip in the middle while the above and below are
black, if the boundary of black and white is clear, the test is passed;
2. Resolution Press Set to switch between the two screens. The test is passed if the black and
white strips in the middle or around are clear, while the adjacent strips can be
distinguished.
3. AshRank Images of different gray rank levels can be distinguished easily with a smooth
transition, and the brightness transition can also be obtained from the images.
Gray rank of low level is not obviously lean to red or green, and then the test is
passed.
4. ColorRank Images of different color rank levels can be distinguished easily with a smooth
transition, and the brightness transition can also be obtained from the images.
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