Pioneer PD-217 Manuale di servizio - Pagina 19
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6.2.3 Check and Adjustment
1. Focus Offset Adjustment
Test mode
None disc
START
TP1
(CN201)
6
FE
4
VC
MOTHER BOARD ASSY
2. Grating Adjustment
Test mode
=
FOCUS servo
=
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.
START
TP1
(CN201)
2
TE
4
VC
MOTHER BOARD ASSY
MOTHER BOARD ASSY
Player
Turn counterclockwise
CLOSE
from null.
CLOSE
OPEN
Player
Low pass filter 1
DC voltage
VR154
0±50mV
Prove (10:1)
GND
Locate null.
Grating
Counterclockwise, Maximum amplitude.
Prove (10:1)
39kΩ
0.001µF
PD-217
Oscilloscope
DC Mode
V: 5mV/div
H: 10mSec/div
Oscilloscope
DC Mode
V: 10mV/div
H: 5mSec/div
19