Pioneer PD-M427 Service Manual - Page 29

Browse online or download pdf Service Manual for Amplifier Pioneer PD-M427. Pioneer PD-M427 32 pages. Multi compact disc player
Also for Pioneer PD-M427: Operating Instructions Manual (40 pages), Operating Instructions Manual (28 pages), Servise Manual (32 pages), Service Manual (32 pages), Operating Instructions Manual (40 pages)

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Pioneer PD-M427 Service Manual
1
11. Focus Best Adjustment
Adjust this point only if adjustment was made in item 10.
Test mode
=
SPDL servo
CLOSE
=
FOCUS servo
CLOSE
=
TRKG servo
CLOSE
Innermost
TEST DISC
circumference
(1 TRK)
PLAY
START
TP1
(CN201)
6
FE
1
RF
4
VC
MOTHER BOARD ASSY
12. Tracking Servo Loop Gain Adjustment
Test mode
=
SPDL servo
CLOSE
=
FOCUS servo
CLOSE
=
TRKG servo
CLOSE
Innermost
TEST DISC
circumference
(1 TRK)
PLAY
START
TP1
(CN201)
2
TE
3
TI
4
VC
MOTHER BOARD ASSY
1
2
VR156
MOTHER BOARD ASSY
Player
VR151
MOTHER BOARD ASSY
Player
Prove (10:1)
100kΩ
PD-M427
2
3
MAX
Adjust the RF level to maximum, with
the focus error voltage within ±150mV.
Oscilloscope
DC Mode
CH1: 5mV/div
CH2: 20mV/div
H: 200ns/div
Prove (10:1)
Prove (10:1)
UNDER
UPPER
JUST
Lissajous Waveform
Oscilloscope
X-Y Mode
X: 20mV/div
Y: 10mV/div
Low-frequency
oscillator
1.2kHz
1Vp-p
Prove (10:1)
GND
3
4
A
B
C
D
E
F
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