Table 2-8  Control-panel diagnostic functions
Item Description Remarks
Cancel button
Exits a test  
Keypad
Selects test settings in some of the test windows  
Red-grid touch test
Verifies that all areas respond to a touch Use this item to check the accuracy of the touch
screen.
Use a finger or 3 mm (.118 in) conductive stylus
to trace between the grid lines to check the
accuracy of the touchscreen calibration.
NOTE: The gap between the grid lines is 6 mm
(.236 in).
When the screen is touched, a line or a dot
displays on the screen (the X and Y coordinates
of the position on the screen are also displayed).
Calibration touch test
Checks calibration Use this item to determine if the touchscreen
calibration is within the acceptable range.
When selected, ten target points (and the X and
Y coordinates of the position of the target point)
display on the screen.
Touching a target causes the X and Y coordinate
of that target to appear in the middle of the
touchscreen (above the cancel button).
NOTE: The product automatically calibrates the
touchscreen. A manual touchscreen calibration
procedure is not available for this product.
Touchscreen LED
display test
Selects a test pattern to view on the display. Use this item to identify touchscreen LED display
problems.
1. Touch the icon.
2. Touch the up 
 or down   arrow buttons
to scroll though touchscreen LED display test
screens.
128 Chapter 2   Solve problems ENWW