Power Supply - Oce 3121 Technical & Service Manual

20 Power supply

Outline
Block diagram of the control circuit for the power supply.
The RDF receives two 24 V power supplies from the copier: 24 VP and 24 VL.
The 24 VP is mainly for loads. It is interrupted when the RDF is opened or the
upper cover is opened. The circuit breaker CB1 isolates the circuits in response
to an excess current.
The 24 VL is converted to 5 V by the regulator. The 5V supply is used by the
logic circuits and the sensors. The fuse resistor R26 melts to interrupt the pow-
er supply if an overload occurs.
24VP J2-3
24VL J2-1
Copier
568 TSM Océ 3121
RDF switch
(MS1)
Circuit breaker
(CB1)
Fuse resistor
(R26)
Regulator
IC (Q14)
RDF controller PCB
Upper cover switch
(MS2)
Logic system
5V
Solenoid (SL1 through SL4)
Clutch (CL1)
Brake (BK1)
Motor (M1 through M3)
Sensor (S1 through S13)
Original width volume (VR1)
Display LED (LED101, 102)
Re-circulating motor (M4)
Functional description