Drive, 42 Scan A And B Assys - Pioneer PDP-4280HD Service Manual

1
4.7 42 Y DRIVE, 42 SCAN A and B ASSYS
A
42 SCAN B ASSY
(HIGH SIDE)
VH IC5V
Scan IC
IC2901
VH IC5V
B
Scan IC
IC2902
VH IC5V
Scan IC
IC2903
VH IC5V
Scan IC
IC2904
VH IC5V
C
Scan IC
IC2905
VH IC5V
Scan IC
IC2906
VH IC5V
D
Scan IC
IC2801
VH IC5V
Scan IC
IC2802
VH IC5V
Scan IC
IC2803
VH IC5V
E
Scan IC
IC2804
VH IC5V
Scan IC
IC2805
VH IC5V
Scan IC
IC2806
F
42 SCAN A ASSY
(LOW SIDE)
30
1
2
Scan Signal
PSUS
SB1
VH
IC5V
Y 2
PSUS
Scan Signal
PSUS
PSUS
Y 3
VH
IC5V
SA1
PDP-4280HD
2
3
VSUS
+16.5V
SUS
BLOCK
RST-D
BLOCK
VF_P VYPRST
PREST
BLOCK
MSK-S
VF_S VF_S
VSUS
SUS
BLOCK
VF_U +16.5V
RESONANCE
BLOCK
+16.5 VKOFS1 VKOFS3
VSUS
KNOFS1
KNOFS3
BLOCK
SUS
IC5V
BLOCK
Photo Coupler
BLOCK
3
4
42 Y DRIVE ASSY
+5V
+6.5V
VSUS +16.5V
REGULATOR
Y 4
VF_S
VKNOFS4
+16.5
KNOFS4
SOFT-G
BLOCK
VSNOFS
VKNOFS2
+16.5
VF_S
SNOFS
KNOFS2
Drive Signal
BLOCK
+16.5V
+5V
Drive Signal
SUS
PreDrive
Drive Signal
LOGIC
BLOCK
VYPRST
VSNOFS VKNOFS1
VH
MAIN
VSUS
DC/DC
CONV.
VKNOFS2
VKNOFS4
VKNOFS3
+16.5V VF_S VF_U
+16.5V IC5V VF_P
+5V
15V Y 7
IC5V/VF
DC/DC DC/DC
CONV.
CONV.
+5V
Scan Signal
Y 6
4
Y 5
VADR
Y 1
VADR
VADR