Pioneer PD-F958 Service Manual page 31

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
MAIN BOARD ASSY
4. Pickup 1Radial/ 2Tangential Direction Tilt Adjustment
Test mode
=
CLOSE
SPDL servo
=
CLOSE
FOCUS servo
=
CLOSE
TRKG servo
TEST DISC
PLAY
Position where the screw is
visible through the adjustment
hole of the float base after
moving toward the
peripheral.
START
TP1
(CN201)
1
RF
4
VC
MAIN BOARD ASSY
VR155
MAIN BOARD ASSY
Player
Low pass filter 1
39kΩ
0.001µF
1
2
TEST DISC
Remove lock tight.
outer
Player
Probe (10:1)
GND
A=B
A
B
Probe (10:1)
2
1
Eye pattern
PD-F958, PD-F908
VC
Oscilloscope
DC Mode
V: 10mV/div
H: 5mSec/div
NG
OK (Smooth)
Oscilloscope
AC Mode
V: 20mV/div
H: 200nSec/div
31