Pioneer XS-R9 Service Manual page 50

XS-R9
QQ
3 7 63 1515 0
5. RF Level Check
Test mode
FOCUS servo → CLOSE
SPDL servo
TRKG servo
TEST DISC
PLAY
START
(CN406)
RF
VC
MAIN
TE
L 13942296513
6. Focus Servo Loop Gain Adjustment
Test mode
FOCUS servo → CLOSE
SPDL servo
TRKG servo
TEST DISC
PLAY
START
(CN406)
FOER
FOIN
www
VC
MAIN ASSY
.
50
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→ CLOSE
→ CLOSE
Check
YEDS–7
R=35mm
Player
TP1
1 1
4
ASSY
→ CLOSE
→ CLOSE
YEDS–7
R=35mm
MAIN ASSY
TP1
6
5
4
x ao
y
i
http://www.xiaoyu163.com
8
Probe (10:1)
Q Q
3 6 7 1 3
VR601
Player
Probe (10:1)
Probe (10:1)
100kΩ
u163
.
2 9 9 4 2 8
1.2VP-P
± 0.2V
If not → repair
Oscilloscope
AC Mode
V: 50mV/div
H: 10mSec/div
1 5 0 5 8 2 9 9 4
Lissajous Waveform
Oscilloscope
X-Y Mode
X: 20mV/div
Y: 5mV/div
Low-frequency
oscillator
1.2kHz
1Vp-p
m
co
9 9
2 8 9 9