Pioneer PD-F958 Service Manual page 33

7. RF Level Adjustment
Test mode
=
CLOSE
SPDL servo
=
FOCUS servo CLOSE
=
TRKG servo CLOSE
Innermost
TEST DISC
circumference
(1 TRK)
PLAY
START
TP1
(CN201)
1 1
RF
4
VC
MAIN BOARD ASSY
8. Focus Servo Loop Gain Adjustment
Test mode
=
SPDL servo
CLOSE
=
FOCUS servo CLOSE
=
TRKG servo
CLOSE
Innermost
TEST DISC
circumference
(1 TRK)
PLAY
START
TP1
(CN201)
6
FE
5
FI
4
VC
MAIN BOARD ASSY
VR153
MAIN BOARD ASSY
Make adjustment if
the value exceeds
the specified range.
Player
Prove (10:1)
GND
VR152
MAIN BOARD ASSY
Player
56kΩ
100kΩ
0.001µF
Low pass filter 2
PD-F958, PD-F908
Check
1.2VP-P
±0.1V
Oscilloscope
AC Mode
V: 50mV/div
H: 10mSec/div
UNDER
JUST
Lissajous Waveform
Oscilloscope
X-Y Mode
X: 20mV/div
Y: 5mV/div
Low-frequency
Prove (10:1)
oscillator
1.2kHz
1Vp-p
Prove (10:1)
GND
UPPER
33