Midway Hydro Thunder, Operation Manual

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Operation 2-17
MONITOR PATTERNS TEST (continued from previous page)
Red, Blue, and Green Color Screen tests fill the screen with 100% of the chosen color at normal
intensity. Each screen should be absolutely uniform from top to bottom and side to side. No retrace lines
or noise should be visible.
The Color Screen tests can verify monitor intensity, black level, blanking and color purity.
Color Screens may not hold their uniformity if the monitor degaussing circuit is defective.
White, Black, 50% Gray, and 25% Gray Screens fill the screen with black, gray or white at various
intensities. The screens should be uniform with no color tints or distortion. No retrace lines or noise should
be visible.
If any of the tests shows a need for adjustment, use the proper controls on the Video Monitor.