4–6
Aligning the Video Monitor
4.3 Deflection Adjustments
4.3.1 Raster Adjustment
1. Set the user controls (Figure 4–1) on the top and the bottom of the
monitor in the center position of the thumbwheels.
2. Adjust the Contrast control just until the raster displays.
3. Adjust the G2 potentiometer to its centered position (Figure 4–4).
4. Adjust VLIN potentiometer to its centered position.
5. Using a hex-head driver, set HLIN for the maximum width of the
raster, then reduce the raster size by about 5 mm.
4.3.2 Anode Voltage Adjustment
The anode voltage affects the overall display size, both the height and the
width of the display. Only the center region of the potentiometer affects
the display size. Adjust the anode voltage as follows:
1. Mark the position on the ANODE potentiometer where the display
size is maximized and minimized, by turning it in one direction and
then the other.
2. Set the ANODE potentiometer to the half-way point between where
the display size was at a maximum and at a minimum.
4.3.3 Height and Width Adjustments
Check and adjust linearity as follows:
1. Display the circle-crosshatch pattern (Figure 4–2).
2. Set the Brightness control on the bottom of the monitor to display the
raster.
3. Set the HPHASE potentiometer so that video display is centered in
the raster.
4. Using a Phillips screwdriver, adjust HCEN to center the display in
the bezel.
5. Using a hex-head driver, set WIDTH so that the right half of the
display is the correct width.
6. Using a hex-head driver, set HLIN so that the left half of the display
is correct.
