Main Drive And 50 Y Sub Drive Assys - Pioneer PDP-507CMX Service Manual

1
4.14 50 Y MAIN DRIVE and 50 Y SUB DRIVE ASSYS
A
50Y SUB DRIVE ASSY
+5V VSUS
PSUS
MASK
BLOCK
B
Y9
Y8
VH
VH DC/DC
CONV.
Vprst
Vprst Reg.
+5V VSUS +16.5V
PSUS
MASK
BLOCK
C
+5V VSUS +16.5V
D
MASK
PSUS
BLOCK
VH
IC5V
IC5V
Photo Coupler
E
BLOCK
Y2
50Y MAIN DRIVE ASSY
F
60
1
2
+16.5V
VOFS
Vprst
VSUS
OFFSET
+RESET BLOCK
BLOCK
+16.5V
VOFS
VOFS
DC/DC
CONV.
VSUS
+5V
+6.5V
REGULATOR
+16.5V
+5V +16.5V
Y4
+5V
RESONANCE
BLOCK
LOGIC
BLOCK
DK MOD.
(IC2107)
+16.5V
SOFT-D
BLOCK
IC5V +16.5V
IC5V/VF
DC/DC
VF
CONV.
Scan Signal
2
3
50Y SUB DRIVE ASSY
Pre
SUS-G
drive
FET
Pre
SUS-B
drive
FET
SUS-
Pre
drive
MSK
Y12
FET
60V
Logic
DK Pre
Mod. drive
Pre
SUS-G
drive
FET
Pre
SUS-B
drive
FET
SUS-
Pre
drive
MSK
FET
Ofset &
Y1
N Reset
P Reset
Scan
Logic
Y5
5V
Scan IC
60V
50 Scan A/B Assy
* VOFS DC/DC converter and VPRST regulator are controled
by electric volume.
VOFS DC/DC converter and VRN DC/DC converter are
generated from 16.5 v, but they do not operate when Vsus is
under 100V.
PDP-507CMX
3
4
to 50 Address Assy
5.0V
VF2
15V
DC/DC Conv.
5V
5.0V
Reg.IC
VOFS VOFS
DC/DC Conv.
VF1
IC5V
IC5V
DC/DC Conv.
Vprst VPRST
Reg.
VH
VH
DC/DC Conv.
50Y MAIN DRIVE ASSY
4
6.5V
16.5V
VSUS