17-2 System Maintenance
The trackball on the control panel is used to move the cursor and plays an importance part in
man-machine communication. As one of the most frequently used parts on the control panel,
it may become ineffective due to dirt that enters into the trackball module.
a) Disassembling the trackball:
Rotate the trackball clamp ring 35 degrees anticlockwise. When the clamping ring lifts,
remove the clamping ring and trackball. You can draw out the ball with the help of adhesive
tape. See the figures below.
Rotate clamp ring 35 degrees anticlockwise Remove clamp ring Draw out the ball
b) Cleaning
Clean the lens slightly using the tissue until there is no foreign matter. Then clean the other
parts and the dust excluder. Make sure to exert force properly when clean the small ball,
otherwise, the small ball may drop down. See the figure below. No system shutdown is
required during the whole clean. Reinstall the ball and clamp ring after the clean is finished.
When liquid is spray onto the trackball area, most of the liquid can be discharged through the
waterspout, besides, you can dry the leaving water using the tissue or cloth.
c) Installing the trackball
Put back the ball, align the buckle with gap of the front cover, press the clamp ring with both
hands and rotate it 35 degrees clockwise to click the buckle. At this moment, the clamp ring
cannot be moved any further, it indicates that the clamp ring clicks in position. See the figure
below. See figure below.
Clamp ring
Turn 35 degrees
Installed
Before installing
Small ball (x3)
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