Compaq 410C 486 DX2/50 MHZ 250 MB 4 MB 9.5 Personal Computer User Manual


 
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5. Clean the trackball with isopropyl (rubbing) alcohol only. Dry it with
a clean, lint-free cloth. DO NOT USE AN ABRASIVE CLEANER.
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If a foam-tipped swap is not available, you can use a cotton swab. But use
a cotton swap only once and then discard it as it may scratch the
trackball.
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6. Gently wipe the cage to remove residue from the surface. Clean the ball
bearings by rubbing with the swab. Do not attempt to remove the
bearings. Next, gently swab the rollers from side to side until all
buildup is removed. Rotate rollers to ensure that all surfaces are
cleaned.
7. Be sure not to leave any cotton fibers on any part of the trackball
components. Use tweezers to remove any fibers that may have accumulated
on or around the cage, rollers, or support post.
8. Let the unit air dry before reassembling it.
9. To reassemble, place the computer right side up and place the cleaned
ball into its cage.
10. Gently replace the retaining ring by aligning the notches; then use
the trackball tool to turn it clockwise one quarter turn until it
locks into place.
11. Use the trackball to verify that it works properly without skipping or
sticking.
Chapter 3.13 Integrated Optical Trackball Assembly (Models 420 and 430)
IMPORTANT: The optical trackball assembly is not interchangeable with the
mechanical trackball assembly in Models 400 and 410.
To remove the integrated optical trackball assembly, follow these steps:
1. Disconnect all power from the computer and remove the AC Adapter and
battery pack (Section 3.2).
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The computer becomes top heavy when the keyboard assembly is removed and
the display is opened. To prevent damage to the display and the computer,
ensure that the display assembly is opened at a 90-degree angle.