Pioneer PD-117 Service Manual page 25

1
3. Tracking Error Balance Adjustment
Test mode
=
SPDL servo
CLOSE
=
FOCUS servo
CLOSE
=
TRKG servo OPEN
Innermost
TEST DISC
circumference
(1 TRK)
PLAY
START
TP1
(CN201)
2
TE
4
VC
MOTHER BOARD ASSY
4. Pickup 1Radial 2Tangential Direction Tilt Adjustment
Test mode
=
CLOSE
SPDL servo
=
FOCUS servo CLOSE
=
CLOSE
TRKG servo
TEST DISC
PLAY
Position where the screw is
visible through
adjustment hole of the float
base after moving toward the
outer peripheral.
START
TP1
(CN201)
1
RF
4
VC
MOTHER BOARD ASSY
1
2
VR155
MOTHER BOARD ASSY
Player
Low pass filter 1
39kΩ
0.001µF
1
2
TEST DISC
2
1
Remove lock tight
the
Player
Probe (10:1)
GND
PD-217
2
3
A=B
A
VC
B
Oscilloscope
DC Mode
V: 10mV/div
H: 5mSec/div
Probe (10:1)
NG
Eye pattern
OK (Smooth)
Oscilloscope
AC Mode
V: 20mV/div
H: 200nSec/div
3
4
A
B
C
D
E
F
25
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