Pioneer PD-F957 Service Manual page 30

PD-F957,PD-F907
QQ
3 7 63 1515 0
6.2.3 Check and Adjustment
1. Focus Offset Adjustment
Test mode
None disc
START
TP1
(CN201)
6
FE
4
VC
MAIN BOARD ASSY
TE
L 13942296513
2. Grating Adjustment
Test mode
=
SPDL servo
=
FOCUS servo
=
TRKG servo
Innermost
TEST DISC
circumference
(1 TRK)
PLAY
START
TP1
(CN201)
www
2
TE
4
VC
MAIN BOARD ASSY
.
30
http://www.xiaoyu163.com
MAIN BOARD ASSY
Player
Turn counterclockwise
from null.
CLOSE
CLOSE
OPEN
Player
Low pass filter 1
x ao
y
i
http://www.xiaoyu163.com
8
DC voltage
VR154
0±50mV
Prove (10:1)
GND
Q Q
3 6 7 1 3
Locate null.
Counterclockwise, Maximum amplitude.
PICKUP
Prove (10:1)
39kΩ
u163
0.001µF
.
2 9 9 4 2 8
Oscilloscope
DC Mode
V: 5mV/div
H: 10mSec/div
1 5 0 5 8 2 9 9 4
Oscilloscope
DC Mode
V: 10mV/div
H: 5mSec/div
m
co
9 9
2 8 9 9