Power Supply Block Of 42 X Drive And 42 Y Drive Assys - Pioneer PDP-4270XA Service Manual

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4.8 POWER SUPPLY BLOCK of 42 X DRIVE and 42 Y DRIVE ASSYS

A
Logic
DK
Mod.
B
Mask
Mod.
Ofset
C
Reset
Scan
Logic
D
Scan IC
42 SCAN A, B ASSYS
E
Note :
VOFS DC/DC converter and VPRST regulator are
controled by electric volume.
The input of VOFS DC/DC converter and VRN DC/DC
converter is 16.5 V, but they do not operate when Vsus
is under 100 V.
F
52
1
2
to
ADDRESS ASSY
42 Y DRIVE ASSY
5.0V
5.0V 5V
Reg.IC
VOFS
VOFS
DC/DC Conv.
VF
IC5V
IC5V
DC/DC Conv.
Vprst VPRST
Reg.
VH VH
DC/DC Conv.
PDP-427XD
2
3
from
POWER SUPPLY
6.5V
16.5V
VSUS
VSUS 16.5V
VRN VRN
DC/DC Conv.
Reset
15V
DC/DC Conv.
Mask
Mod.
5.0V
5V
Reg.
Logic
DK
Mod.
to
ADDRESS ASSY
3
4
from
POWER SUPPLY
6.5V
42 X DRIVE ASSY
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