XEROX DFC165 & DWC 165c Service Manual
2-15
2.3.4 Block Diagram of the Power Supply Board
Fig. 2-13 Block diagram of the power supply board
The power supply board provides a maximum power of 35 Watts and supplies, via
the switching circuit, the following direct voltages:
- +28 VDC (
±
10%), for the motors, variable according to the load
- +24 VDC (
±
2%), for the print head
- +12 VDC (
±
10%), for CCD, NCU and logic circuits
- -12 VDC (+10% -15%), for CCD and logic circuits
- +5 VDC (
±
5%) for sensors and logic circuits.
Fuse
2 A
Mains filter
Primary rectifier
Switching
transformer
Mains voltage
Voltage reg.
Switching
controller
MOS
+24 V
Diode rectifier
-12 V
+12 V
+5 V
+28
V
