Functional Design - Oce 3121 Technical & Service Manual

5 Functional design

Electrical circuitry
The electrical circuits are controlled by the microprocessor (CPU) on the RDF
control PBA.
The CPU receives various signals from the sensors in the RDF and in the cop-
ier. In turn, the CPU generates signals to activate the various electrical com-
ponents, according to pre-programmed instructions.
Sensor
Variable
resistor
508 TSM Océ 3121
RDF controller PCB
CPU
(Q1)
ROM
(Q2)
RAM
(Q4)
Communi-
cation IC
(Q3)
24V 5V
5VDC
power
supply
Power supply
circuit
Copier
Motor
Solenoid
Clutch
Brake
Display
LED PCB
Functional description
Motor