Philips iE33 - Trackball

4535 611 98931 iE33 Service Manual Page 229
CSIP Level 1 Preventive Maintenance: Trackball
Trackball The recommended interval for cleaning the control panel trackball is every 12 months, but peri-
odic checks and cleaning should be done more often, if the system is in a dusty environment.
Check the control panel trackball for smooth operation. Clean the trackball and the contacts in
the trackball reservoir if needed.
➤ To clean the trackball
1. Press down on the black rubber portion of the retainer ring with your thumb and index fin-
ger (Figure 8-7).
2. Turn the retainer ring counterclockwise to loosen the ring.
3. Unscrew the ring and remove it.
4. Remove the trackball from the reservoir (Figure 8-7).
5. Clean dust and debris from the trackball reservoir with a cotton swab moistened with alco-
hol.
6. Clean the shaft and rollers with a cotton swab moistened with alcohol.
7. Place the trackball in the trackball reservoir.
8. Carefully align the retaining ring to prevent cross-threading.
9. Turn the retaining ring clockwise until it is snug.