Power Supply Block Of 42 X, Y Drive And 42 Scan A, B Assys - Pioneer PDP-4280HD Service Manual

5

4.8 POWER SUPPLY BLOCK of 42 X, Y DRIVE and 42 SCAN A, B ASSYS

to 42 ADDRESS ASSY
42 Y DRIVE ASSY
Logic
Pre
SUS-B
drive
FET
Pre
SUS-G
drive
FET
VF1
Pre
SUS-U
drive
VF2
IGBT
Pre
SUS-D
drive VF3
IGBT
IC5V
Pre
HMSK
drive
FET
Pre
LMSK
drive
FET
Pre
YPRST
drive
FET
Pre
SNOFS
drive
FET
Pre
YKOFS
1 drive
FET
Pre
YKOFS
2 drive
FET
Pre
YKOFS
3 drive
FET
Pre
YKOFS
drive
4
FET
Pre
RST-D
drive
FET
Pre
SOFT-G
drive
FET
Scan
Logic
IC5V
Scan IC
42 SCAN A, B ASSYS
5
6
5.0V
from
POWER SUPPLY
5.0V 5V 6.5V
Reg.IC
16.5V
VSUS
15V
DC/DC Conv.
IC5V
DC/DC Conv.
VH
DC/DC Conv.
VYPRST
Reg.
VSNOFS
Reg.
VYKOF
S12
Reg.
VYKOF
S3
Reg.
VYKOF
S4
Reg.
VH
6
7
42 X DRIVE ASSY
Logic
Pre
SUS-B
drive
FET
Pre
SUS-G
drive
FET
Pre
SUS-U
drive
IGBT
Pre
SUS-D
drive
IGBT
Pre
XPRST
drive
FET
Pre
XSOFT-D
drive
FET
Pre
XKOFS1
drive
FET
Pre
XKOFS2
drive
FET
Note:
VYPRST, VSNOFS, VYKOFS12, VYKOFS3, VYKOFS4
and VXKOFS2 voltages are electrical volume controls.
PDP-4280HD
7
8
to 42 ADDRESS ASSY
5.0V
from
POWER SUPPLY
5.0V 5V 6.5V
Reg.IC
16.5V
VSUS
VF
DC/DC
Conv.
VPOFS
VXKOFS1
VXKOFS1
Reg.
VXKOFS2
VXKOFS2
Reg.
8
A
B
C
D
E
F
31