Display Test - GE MAC 1200 Servicing Instructions

GE Medical Systems MAC 1200 V 1.2 Page 32
Information Technologies 227 492 21 Rev F
3.3 Display test
After pressing the "1" key the following menu appears:
Display test
(1) Test pattern
(2) Clear display
(3) Restore menu
(4) inverse
(5) Display illumination
Contrast control
- Shift Cursor Down
- Shift Cursor Up
Terminate with any key
Pressing any other key than one of those listed in the menu above leads back to the initial
display menu.
(1) Test pattern
Pressing this key generates a chessboard pattern, Each subsequent pressing generates the
inverse display of its predecessor.
(2) Clear display
All display pixels are inactive
(3) Restore menu
The initial display test menu is displayed.
(4) Inverse
The contents of the existing display appear in reverse video.
(5) Display illumination
The illumination is switched on or off by pressing this key.
Contrast control
The contrast setting can always be adjusted as described above (cursor keys).