49
XC-L7
5. Focus Servo Loop Gain Adjustment
CH1
CH2
(X)
(Y)
6. Tracking Servo Loop Gain Adjustment
Probe(10:1)
TP1
(CN1102)
CD MAIN UNIT
START
Player
Oscilloscope
X-Y Mode
X : 50mV/div
Y : 20mV/div
VR1101
Lissajous Waveform
CD MAIN UNIT
Probe(10:1)
100k
Ω
0.001
µ
F
Low pass filter
Probe(10:1)
CH1
CH2
(X)
(Y)
TP1
(CN1102)
CD MAIN UNIT
START
Player
Oscilloscope
X-Y Mode
X : 20mV/div
Y : 5mV/div
FE
FIN
VC
TIN
TE
VC
Lissajous Waveform
Probe(10:1)
Low frequency
1.2kHz 2Vp-p
oscillator
Low-frequency
1.2kHz 1Vp-p
oscillator
VR1102
CD MAIN UNIT
Test mode
FOCUS servo
SPDL servo
TRKG servo
→
CLOSE
→
CLOSE
→
CLOSE
TEST DISC
PLAY
R=35mm
YEDS-7
Test mode
FOCUS servo
SPDL servo
TRKG servo
→
CLOSE
→
CLOSE
→
CLOSE
TEST DISC
PLAY
R=35mm
YEDS-7
100k
Ω
GND
GND
GND
GND
4
5
6
4
3
2
39k
Ω