28
Model
XE520s
Service
Q
&
A
Part
4. Smoothness
Rev.
1
Procedures
:
1.
Check tightness of screws and bolts
if the unit clicks.
2.
Otherwise, there might be foreign
materials on either the rail or Slide
Wheel. Use rubbing alcohol to wipe
and apply some lubricant both parts,
as shown in figure 1.