CDJ-100S
38
5. Focus Servo Loop Gain Adjustment
6. Tracking Servo Loop Gain Adjustment
UNDER
Oscilloscope
X-Y Mode
X: 20mV/div
Y: 5mV/div
GND
Probe (10:1)
Player
START
TP1
(CN201)
FOIN
VC
UPPER
JUST
Low-frequency
oscillator
1.2kHz
1Vp-p
GND
GND
Probe (10:1)
39k
Ω
0.0018
µ
F
Low pass filter 2
100k
Ω
FOER
6
5
4
Lissajous Waveform
MOTHER BOARD ASSY
Test mode
FOCUS servo
SPDL servo
TRKG servo
=
=
=
CLOSE
CLOSE
CLOSE
TEST DISC
PLAY
WAH Key - ON
Disc: Center circumference
VR101
MOTHER BOARD ASSY
UNDER
Oscilloscope
X-Y Mode
X: 50mV/div
Y: 5mV/div
GND
Probe (10:1)
Player
START
TP1
(CN201)
TRIN
VC
UPPER
JUST
Low-frequency
oscillator
1.4kHz
2Vp-p
GND
GND
Probe (10:1)
39k
Ω
0.001
µ
F
Low pass filter 1
100k
Ω
TRER
2
3
4
Lissajous Waveform
MOTHER BOARD ASSY
VR102
MOTHER BOARD ASSY
6.2.4 Check and Adjustment
Test mode
FOCUS servo
SPDL servo
TRKG servo
=
=
=
CLOSE
CLOSE
CLOSE
TEST DISC
PLAY
WAH Key - ON
Disc: Center circumference