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Philips CDM-2/0414 Service Manual page 3

Compact disc mechanism

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2. TECHNICAL DATA
General
-
Application: Compact Disc "Home Player"
-—
Operating position: Vertical (+ 10°)
-
Single—stage radial and balanced actuator for track
following
-
Track following error detection method : Push—Pull
-
Focus error detection method : Double Foucault
-
DC turntable motor with permanent magnets
-
Dimensions: 130 x 100 x 44 mm
-
Weight: abt. 270 grams
Radial actuator
-
Swing angle: 72°
|
-
Diameter readout range: from 47.4 mm + 0.6 mm to
117.5 mm
+ 0.6 mm
-
Squareness relative to turntable: 90° + 0.3°
-
Bearing friction: 0.75 mNm
-
Total ohmic resistance of the coils: 10 Q + 0.6 Q
-
Maximum allowable voltage: 14V/DC continuous
-
K factor: 0.025 Nm/A (+ 20%)
Focus actuator
-
Vertical amplitude: 1.9mm
+ 0.2 mm
-
DC voltage across the focus motor in focus: between
—0.8V and +0.7V.
-
Sensitivity: 13 mm/A
-
Ohmic resistance: 23.5 Q + 2.5Q
-
Maximum allowable voltage: 8V/DC continuous
Laser diode LTO 22MC
~
Wave length: 780 nm + 10 nm
-
Light energy:
3 mW
~
Voltage across the diode at 3mW: typical = 1.75 V,
max. = 2.2 V
Turntable motor
-
Sense of rotation: CW (clockwise)
-
Nominal voltage: 2.2 V/DC
-
Nominal speed: 210...600 rpm.
Total ohmic resistance rotor: 16 Q + 1.6 Q
~-
Maximum allowable voltage: 12V/DC
2-1
CS 9 485 cs

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