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50
XS-R9
6
5
4
Oscilloscope
X-Y Mode
X: 20mV/div
Y: 5mV/div
Low-frequency
oscillator
1.2kHz
1Vp-p
VR601
Probe (10:1)
Probe (10:1)
GND
GND
MAIN ASSY
MAIN ASSY
Lissajous Waveform
FOER
FOIN
VC
Test mode
FOCUS servo
→
CLOSE
SPDL servo
→
CLOSE
TRKG servo
→
CLOSE
6. Focus Servo Loop Gain Adjustment
100k
Ω
Player
1
1
4
5. RF Level Check
Test mode
FOCUS servo
→
CLOSE
SPDL servo
→
CLOSE
TRKG servo
→
CLOSE
Check
Player
START
If not
→
repair
1.2VP-P
±
0.2V
Oscilloscope
AC Mode
V: 50mV/div
H: 10mSec/div
Probe (10:1)
GND
TP1
(CN406)
MAIN ASSY
RF
VC
PLAY
YEDS–7
R=35mm
TEST DISC
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QQ 376315150
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9
2
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8
TEL 13942296513
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9
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TEL 13942296513 QQ 376315150 892498299