Oce 3121 Technical & Service Manual page 730

General Block Diagram
Analog
processor PCB
A/D
Laser
driver
Control panel
CPU
Sorter
RDF/ADF
ASSIST
The CORE/IP board, FAX motherboard come standard with the Océ
Note:
3121. The G3 FAX board is optional
504 TSM Océ 3121
Image processor CORE/IP Board
PCB
Image processing
circuit
Binary
processing
Ratio
change
D/A Density
CPU
DP
DP
RAM
RAM
CPU
Host computer
IPC CPU
DC controller PCB
Main
DC loads
motor
Clutch
Solenoid
M
Motor
Sensor
Etc.
M
Laser scanner motor
FAX
Mother-
board
Video
signal
switching
circuit
Controller
Memory
SCSI
SCSI Board
(option)
Composite power supply PCB
Lamp
HVT
CPU
regulator
circuit
circuit
G3 FAX Board
Memory A Memory B
(expansion) (expansion)
Memory A Memory B Coding/
decoding
Memory
controller
Selector
Modem
Protocol controller PCB
Command
conversion
circuit
CPU
Printer board (option)
DP
DC power
RAM
supply
Video
controller
15V
24V 7V
-12V
5V
DP
RAM
System
Mother-
board
Network I/F Board
Functional description
Telephone
line
NCU
CPU
CPU
LAN
controller
(option)