Hyundai H-MS1107, Service Manual

Page: 8 / 25

Page 7
Diagram of the servo mechanism of the DVD player
Principal axis motor
Laser beam
Optical detector
Object
lens
Focusing
adjustment
Tracking
control
Laser tube
Gliding mechanism of the light head
Focusing servo: makes the
focus match the information
side of a CD
Tracking servo: makes the light
beam track the sound track.
Feeding servo: moves the
whole light head mechanism.
APC: controls the constant
laser output.
Principle axis servo: Keeps CD in
CLV revolution.
Compact Disc