Pioneer PDP-507CMX Service Manual page 146

1
SUS-B ADJUSTMENT
A
50Y MAIN DRIVE Assy
from
DIGITAL Assy
YSUS-U
Pin
B
from
DIGITAL Assy
YSUS-B
Pin
C
SUS-D ADJUSTMENT
50Y MAIN DRIVE Assy
1 Measure the SUS-D pulse width (Tsus-D).
from
DIGITAL Assy
D
YSUS-D
E
F
146
1
2
1 Measure the SUS-U input delay time (∆ Tsus-u).
IC2101
IC2003_A4 IC2102
Photo
Coupler
5
2 Adjust the SUS-B input delay time so that it becomes "∆ Tsus-u + α ± 5 nsec."
VR2001
IC2209
IC2003_A4
Photo
Coupler
4
VR2002
IC2002_A7
Pin
8
2
3
IC2208
2 Adjust the pulse width of the SUS-D input signal for
the DK module so that it becomes "Tsus-D ± 5 nsec."
IC2104
PDP-507CMX
3
4
TP2105
Q2103
IC2107
Pin 2
Y DK
Module
TP2276
Q2221
Q2210
FET
Q2215
Q2216
FET
TP2107
Q2106
IC2107
Y DK
Module
4