Service Aids - IBM 6360 Product Support Manual

SERVICE AIDS
The raster on the display screen is a
normal display image which is usually
visible when the brightness control is
turned up (clockwise) all the way.
(See Figure 4-12.) The raster con-
sists of horizontal scan lines across
the entire screen. These lines define
all possible dot positions.
A blank screen or blank area of the
screen may not be a problem in the
display module. The problem may be a
change in, or a loss of, the input
signals.
Note:
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When a displayed character is
changed an "after image" remains for a
short time.
Chapter 4. Large Display 4-11