Pioneer PD-F908 - Page 30

PD-F958, PD-F908
30
4
2
6
1. Focus Offset Adjustment
Test mode
None disc
VR154
MAIN BOARD ASSY
DC voltage
0±50mV
Oscilloscope
DC Mode
V: 5mV/div
H: 10mSec/div
Prove (10:1)
GND
START
TP1
(CN201)
Player
2. Grating Adjustment
Oscilloscope
DC Mode
V: 10mV/div
H: 5mSec/div
Player
FE
VC
START
TP1
(CN201)
TE
VC
Locate null.
Counterclockwise, Maximum amplitude.
39kΩ
0.001µF
Prove (10:1)
GND
Low pass filter 1
MAIN BOARD ASSY
MAIN BOARD ASSY
6.2.3 Check and Adjustment
4
Test mode
SPDL servo
FOCUS servo
TRKG servo
=
=
=
CLOSE
CLOSE
OPEN
TEST DISC
Innermost
circumference
(1 TRK)
PLAY
Turn counterclockwise
from null.
PICKUP