Pioneer PD-117 Service Manual page 24

1
6.2.3 Check and Adjustment
A
1. Focus Offset Adjustment
B
START
FE
C
VC
MOTHER BOARD ASSY
2. Grating Adjustment
Test mode
FOCUS servo
D
SPDL servo
TRKG servo
8-cm DISC
PLAY
Position at whitch the adjust-
ment hole is visible outside
the disc when moving toward
the outer circumference.
E
START
TE
VC
MOTHER BOARD ASSY
F
24
1
2
Test mode
None disc
MOTHER BOARD ASSY
Player
TP1
(CN201)
6
4
Turn counterclockwise
=
CLOSE
from null.
=
CLOSE
=
OPEN
Player
TP1
(CN201)
2
4
2
3
VR154
Prove (10:1)
GND
Locate null.
Grating
Counterclockwise, Maximum amplitude.
Low pass filter 1
Prove (10:1)
39kΩ
0.001µF
PD-217
3
4
DC voltage
0±50mV
Oscilloscope
DC Mode
V: 5mV/div
H: 10mSec/div
Oscilloscope
DC Mode
V: 10mV/div
H: 5mSec/div
4