Pioneer PD-M427 Service Manual page 26

1
A
5. RF Level Adjustment
Test mode
SPDL servo
FOCUS servo
TRKG servo
TEST DISC
PLAY
B
START
C
MOTHER BOARD ASSY
6. Focus Best Adjustment
Test mode
D
SPDL servo
FOCUS servo
TRKG servo
TEST DISC
PLAY
E
START
(CN201)
FE
RF
VC
MOTHER BOARD ASSY
F
26
1
2
=
CLOSE
=
CLOSE
=
CLOSE
Innermost
circumference
(1 TRK)
MOTHER BOARD ASSY
Player
TP1
(CN201)
1 1
RF
4
VC
=
CLOSE
=
CLOSE
=
CLOSE
Innermost
circumference
(1 TRK)
MOTHER BOARD ASSY
Player
TP1
6
1
4
2
3
VR153
Prove (10:1)
GND
VR156
Adjust the RF level to maximum, with the
focus error voltage within ±150mV.
Prove(10:1)
Prove(10:1)
PD-M427
3
4
1.2VP-P
±0.1V
Oscilloscope
AC Mode
V: 50mV/div
H: 10mSec/div
MAX
Oscilloscope
DC Mode
CH1: 5mV/div
CH2: 20mV/div
H: 200ns/div
4