Pioneer PD-X99M Service Manual page 42

PD-xX9S9SM
Check items/
Adjustment
specifications
Adjusting
Points Adjustment procedure
Oscilloscope Test
Setting Points
ee ee
Step
No.
0.14nS | Lead of
/div pin8 of
IC8 (TP6)
Main board
¢
Press TRACK FWD key and PLAY key by turns to close
assembly
the focus and spindle servos.
Turn AC-GND-DC switch of Oscilloscope to DC.
Adjust vertical position of Oscilloscope so that the
waveform is positioned at the center.
Note: It is not necessary to set the GND level at the
center of the oscilloscope in this adjustment.
Simply position the waveform at the center of
the oscilloscope with the vertical position
control.
Waveform is
positioned at
the center
Press PAUSE key to close the Tracking servo.
Waveform is
positioned at
the center
Adjust VL1 (VCO coil) with a core driver so that the
waveform is positioned at the center.
* Open and close the Tracking servo by depressing
PAUSE key a few times and verify that the DC level
of the waveforms is not changed.
DC level of the
waveforms is not
changed
C27
cos
oh
R99 "98 5100
' 96 Re ROS
z
Observe point
eo SPCC C2090000
Fig. 7-8 VCO free-run frequency
observe point
45