Pioneer PDP-507XD Service Manual page 126

1
DELAY ADJUSTMENT OF THE CONTROL SIGNAL (SUS-D)
A
1 Measure the pulse width of the SUS-D signal.
2 Check the pulse width of the SUS-D input signal for the DK module.
Adjust the variable control so that the pulse width of the SUS-D input signal for the DK module becomes the "pulse width of
the SUS-D signal ± 5 nsec."
Note: For details on measuring points of waveform, see the figure below.
B
SUS-D signal (input to the DRIVE Assy)
C SUS-D signal (input to the DK module)
D
E
F
126
1
2
50 % of the crest value
50 % of the crest value
SUS-D pulse width: Tsus-Dg
Adjust so that "Tsus-Dg = Tsus-D ± 5 nsec," using the variable
control shown in the table below:
Assy VR
Y MAIN DRIVE VR2002
2
3
SUS-D pulse width
Tsus-D
50 % of the crest value
SUS-D pulse width
Tsus-Dg
PDP-507XD
3
4
50 % of the crest value
4