19-4 System Maintenance 
Put back the ball, align the buckle with gap of the front cover, press the clamp ring 
with both hands and rotate it 35 degrees clockwise to click the buckle. At this 
moment, the clamp ring cannot be moved any further, it indicates that the clamp 
ring clicks in position. See the figure below. 
                       
 
 
 
  Cleaning the peripherals 
Do the cleaning maintenance according to your actual peripheral configuration; items 
which are not configured can be skipped. 
Content  Description 
Color and B/W 
video printer 
First wipe off dust or stain attached to the cover of printer with soft dry 
cloth, then clean the inside of printer. Be sure to do the cleaning 
maintenance according to the operation manual if is necessary. 
Graph / text 
printer 
First wipe off dust or stain attached to the cover of printer with soft dry 
cloth, then clean the inside of printer. Be sure to do the cleaning 
maintenance according to the operation manual if is necessary. 
Foot switch 
Use soft dry cloth with a little mild soap water to wipe off the dust or stain 
attached to the pedals or cable of foot switch.