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Should the video drive level exceed the 2.5 volts specified, an external contrast control
must be provided. The video drive signal is connected to the top end of the SOOn pot, the
bottom end is grounded and the wiper arm connects to the video input of the edge
connector as shown.
VIDEO
SIGNAL
500 ohm
CONTRAST
CONTROL
(EXTERNAL)
-
-
TO PIN 8 OF
EDGE CONNECTOR
3. Once power is applied to the display and the input signals connected, adjust the
brightness control until the edges of the raster are visible.
4. Depending on the requirements for height and width of the video presentation, the
vertical size control and width coil should be adjusted accordingly.
5. The power supply board also has a control to adjust the regulated B+ of the monitor to
+ 15V. Check for proper adjustment.
6. Adjust the phase control to center the video information within the raster. (The contrast
control may have to be adjusted to obtain a display of the video information.)
7. Adjust brightness control for visual cutoff of the raster.
8. Adjust external contrast control for desired luminance.
9. Adjust focus control for best possible overall focus.
IMPORTANT NOTE: DAG GROUNDING.
Each unit provides for grounding of the main P.C. Board and CRT socket board to 'the dag
of the CRT through the dag grounding spring.
The ground wires are connected to the shell bond or T-band through a terminal lug. Upon
installing the Video Display in a terminal, this grounding procedure should be followed to
provide adequate high voltage filtering and arc protection. This especially pertains to
mounting the video display as a kit version.
7
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