9. MAINTENANCE, TROUBLESHOOTING
9-4
9.5 How to Clean the Filter in the Processor Unit
Clean the filter in the Processor Unit when the filter becomes dusty. Remove the filter
and clean it with water and a mild detergent. Let the filter dry then set it to the Proces-
sor Unit.
9.6 How to Clean the Trackball on the Control Units
If the trackball does not roll smoothly it may require cleaning. Do the following to clean
the trackball.
1. Turn the ring on the trackball 45°.
Trackball unit
2. Remove the retaining ring and ball.
3. Clean the ball with a soft lint-free cloth.
4. Blow carefully into the ball-cage to dislodge dust and lint. Look for a build-up of
dirt on the metal rollers. If dirty, clean the rollers using a cotton swab moistened
lightly with isopropyl-rubbing alcohol.
5. Make sure that fluff from the swab is not left on the rollers.
6. Replace the ball and retainer ring. Be sure the retainer ring is not inserted reverse-
ly.
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