Pioneer PD-F957 Service Manual page 31

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3 7 63 1515 0
3. Tracking Error Barance Adjustment
Test mode
SPDL servo
FOCUS servo
TRKG servo
TEST DISC
START
MAIN BOARD ASSY
TE
L 13942296513
4. Pickup 1Radial/ 2Tangential Direction Tilt Adjustment
Test mode
SPDL servo
FOCUS servo
TRKG servo
TEST DISC
Position where the screw is
visible through the adjustment
hole of the float base after
moving
peripheral.
START
www
.
MAIN BOARD ASSY
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=
CLOSE
=
CLOSE
=
OPEN
Innermost
circumference
(1 TRK)
PLAY
Player
TP1
(CN201)
2
TE
4
VC
=
CLOSE
=
CLOSE
=
CLOSE
PLAY
toward the outer
TP1
(CN201)
1
RF
x ao u163
y
4
VC
i
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2 9
8
VR155
MAIN BOARD ASSY
Low pass filter 1
39kΩ
0.001µF
Q Q
3 6 7 1 3
2
1
2
1
TEST DISC
Remove lock tight.
Player
Probe (10:1)
GND
.
PD-F957,PD-F907
9 4 2 8
A=B
A
VC
B
Oscilloscope
DC Mode
V: 10mV/div
H: 5mSec/div
Probe (10:1)
1 5 0 5 8 2 9 9 4
NG
Eye pattern
OK (Smooth)
Oscilloscope
AC Mode
V: 20mV/div
H: 200nSec/div
m
co
9 9
2 8 9 9
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