Pioneer PDP-5000EX Service Manual page 116

1
DELAY ADJUSTMENT OF THE CONTROL SIGNAL (SUS-B)
A
1 Measure the delay time for the SUS-U signal.
2 Check the delay time for the SUS-B signal.
Adjust the variable control so that the SUS-B delay time becomes "SUS-U delay time + α ± 5 nsec."
Note: For details on measuring points of waveform, see the figure below.
SUS-U signal (input to the DRIVE Assy)
SUS-U signal (input to the DK module)
B
SUS-B signal (input to the DRIVE Assy)
SUS-B signal (input to the MSK module)
C
SUS-B delay time: ∆ Tsus-b
Adjust so that "∆ Tsus-b = ∆ Tsus-u + α ± 5 nsec," using the variable
controls shown in the table below:
DELAY ADJUSTMENT OF THE CONTROL SIGNAL (SUS-G)
1 Measure the delay time for the SUS-D signal.
2 Check the delay time for the SUS-G signal.
Adjust the variable control so that the SUS-G delay time becomes "SUS-D delay time + β ± 5 nsec."
D
Note: For details on measuring points of waveform, see the figure below.
SUS-D signal (input to the DRIVE Assy)
SUS-D signal (input to the DK module)
SUS-G signal (input to the DRIVE Assy)
E
SUS-G signal (input to the MSK module)
SUS-G delay time: ∆ Tsus-g
F
Adjust so that "∆ Tsus-g = ∆ Tsus-d + β ± 5 nsec," using the variable
controls shown in the table below:
116
1
2
1.5 V
5 V
SUS-U delay time
∆ Tsus-u
1.5 V
5 V
SUS-D delay time
∆ Tsus-d
PDP-5000EX
2
3
1.5 V
5 V
SUS-B delay time
∆ Tsus-b
Value of α
Assy VR
X DRIVE VR1002
Y DRIVE VR2010
1.5 V
5 V
SUS-G delay time
∆ Tsus-g
Value of β
Assy VR
X DRIVE VR1001
Y DRIVE VR2011
3
4
Time
70 nsec
85 nsec
Time
120 nsec
100 nsec
4