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PD-M427, PD-M407
QQ
3 7 63 1515 0
3. Tracking Error Balance Adjustment
Test mode
SPDL servo
FOCUS servo
TRKG servo
Innermost
TEST DISC
circumference
(1 TRK)
PLAY
START
TP1
(CN201)
2
TE
4
VC
MOTHER BOARD ASSY
TE
L 13942296513
4. Pickup 1Radial 2Tangential Direction Tilt Adjustment
Test mode
SPDL servo
FOCUS servo
TRKG servo
TEST DISC
PLAY
Position where the screw is
visible through the adjustment
hole of the float base after
moving
toward
peripheral.
START
TP1
(CN201)
www
RF
VC
.
MOTHER BOARD ASSY
24
http://www.xiaoyu163.com
=
CLOSE
=
CLOSE
=
OPEN
MOTHER BOARD ASSY
Player
Low pass filter 1
=
1
CLOSE
=
CLOSE
=
CLOSE
TEST DISC
Remove lock tight.
the
outer
Player
1
x
ao
y
4
i
http://www.xiaoyu163.com
8
A
B
VR155
Probe (10:1)
39kΩ
0.001µF
Q Q
3
6 7
1 3
2
2
1
Eye pattern
Probe (10:1)
u163
GND
.
2 9
9 4
2 8
A=B
VC
Oscilloscope
DC Mode
V: 10mV/div
H: 5mSec/div
1 5
0 5
8
2 9
9 4
NG
OK (Smooth)
Oscilloscope
AC Mode
V: 20mV/div
H: 200nSec/div
m
co
9 9
2 8
9 9