Service manual

COPYRIGHT © 2005 MERIT INDUSTRIES, INC.
Troubleshooting Information - Troubleshooting Your Touchscreen
Megatouch MAXX Technical Reference Manual
MICROTOUCH:
Features:
• SMT-3 Controller in white box
• Green LED on controller lit at half brightness, full brightness when screen is touched
• Overlay functions on capacitance.
• Touchscreen cable is on right side of CRT.
Troubleshooting:
• LED Flashing from 1 to 5 times - detected error or possible defective controller
• LED not lit - Check +12 vdc. The SMT-3 controller may also be defective.
See Figure 1 for the touchscreen overlay connector schematic.
ELO GRAPHICS:
Features:
• Controller in a silver box
• Overlay functions on Sound Acoustic Waves (SAW) - sound waves are reflected
across the screen
• The green LED is solid when the screen is touched and flashes when the screen is
not touched.
• Touchscreen cable is on left side of CRT
Troubleshooting:
• If check for dirt in the ridges around the edge of the screen overlay.
• If the screen is not responding properly or the LED is solid even when the screen is
not touched:
• Check the screen for objects that may be attached.
• Make sure the bezel is dry and not stuck to the screen.
• Check for dirt in the grooves etched around the outside edge of the screen.
• The controller may be defective.
CALIBRATION:
1 - Press the Calibrate button.
2 - Touch the dot that appears in the corner for 2 seconds.
3 - Touch the dot that appears in the opposite corner for 2 seconds.
4 - Touch the dot that appears in the center of the screen for 2 seconds.
The cursor should follow your finger wherever you touch the screen.
NOTE: Earlier versions of XL and MAXX software will have a two-point calibration.
CALIBRATION or LOCKUP PROBLEMS:
• If the calibration is off over the whole area of the screen:
• Recalibrate the screen.
• Switch the touchscreen controller with one from another game if possible--a
defective controller can produce this problem.
Troubleshooting Your Touchscreen