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7. MAINTENANCE, TROUBLESHOOTING
7-3
7.3 Trackball Maintenance
If the cursor skips or moves abnormally, you may need to clean the trackball.
1. Turn the retainer ring counterclockwise 45° to unlock it.
Retainer Ring
PUSH TO ENTERPUSH TO ENTER
DEFDEF
MNOMNO
VWXVWX
_'#_'#
POWERPOWER
RANGERANGE
TXTX
00
JKLJKL
44
77
STUSTU
55
88
ABCABC
2211
BB
GAINGAIN
ALARMALARM
EBLEBL
VRMVRM
PQRPQR
YZ&YZ&
66
99
DISPDISP
EE
MENUMENU
CC
DD
CLEARCLEAR
GHIGHI
33
SAVESAVE
MOBMOB
HIDEHIDE
SHOWSHOW
AA
Control unit
2. Remove the retainer ring and ball.
3. Clean the ball with a soft lint-free cloth, and then blow carefully into the
ball-cage to dislodge dust and lint.
4. 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
reversely.
Note: Trackball maintenance parts are available as below.
Part
Type Code No.
Retainer ring and ball MU3721 000-144-645
offered by Busse-Yachtshop.de
213


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