Specifications

SQ: 2-6
RS3: Service Quick Reference Guide
Maintenance
Cleaning t he Trackball
Most problems with a trackball can be cured by a thorough cleaning. Dirt
accumulates around the ball itself and in the optical disk readouts inside
the assembly. The trackball itself can be replaced without replacing the
entire assembly.
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To clean a trackball:
Required tools:
#1 Phillips screwdriver
1/16-inch Allen wrench
Source of dry air under pressure (20 psi max)
Denatured alcohol
1. The Trackball Assembly can be part of the Operator Keyboard
Assembly or be free standing.
a. Operator Keyboard Assembly: U nplug the keyboard cable
from the keyboard interface card. Turn the keyboard
assembly over and remove the four screws that hold the
Trackball Assembly to the Operator Keyboard.
b. Free-standing trackball: Unplug the trackball cable. Remove
the four screws that hold the base in place.
2. Remove the two brackets that hold the black box containing the
trackball. Push the black box out. This may require some force
since the black box is glued to the assembly.
3. Unplug the black box from the trackball electronics.
4. Remove the black box top cover (four Allen screws).
5. Remove and clean the ball and the area around the hole in the
cover.
6. Use dry air to blow dust and dirt out of the optical sensor wheels
and sensors.
7. Clean the bearing that holds the ball tightly against the sensor
wheels.
8. Reassemble the black box.
9. Connect the trackball electronics cable and install the box in the
trackball assembly, being careful to center the ball in the hole in
the k eyboard before you tighten the brackets.
10. Replace the base or reinstall in the keyboard assembly.
11. Plug in the cable and test. If the trackball does not work, replace
the black box (1984--1653--000x).