Pioneer PD-M427 Service Manual page 23

QQ
3 7 63 1515 0
6.2.3 Check and Adjustment
1. Focus Offset Adjustment
START
MOTHER BOARD ASSY
TE
L 13942296513
2. Grating Adjustment
Test mode
SPDL servo
FOCUS servo
TRKG servo
TEST DISC
START
www
.
MOTHER BOARD ASSY
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Test mode
None disc
Player
TP1
(CN201)
6
FE
4
VC
=
CLOSE
=
CLOSE
=
OPEN
Innermost
circumference
(1 TRK)
PLAY
Player
TP1
(CN201)
2
TE
x ao
y
4
VC
i
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8
VR154
MOTHER BOARD ASSY
Prove (10:1)
GND
Q Q
3 6 7 1 3
Turn counterclockwise
from null.
PICKUP
Low pass filter 1
39kΩ
u163
0.001µF
.
PD-M427, PD-M407
2 9 9 4 2 8
DC voltage
0±50mV
Oscilloscope
DC Mode
V: 5mV/div
H: 10mSec/div
1 5 0 5 8 2 9 9 4
Locate null.
Counterclockwise, Maximum amplitude.
Oscilloscope
DC Mode
V: 10mV/div
H: 5mSec/div
m
Prove (10:1)
co
9 9
2 8 9 9
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