Overview
D093/D094 2-18 SM
2.4.5 ELECTRICAL COMPONENTS
Overview
Overall System
The illustration below shows the basic layout of the main machine circuit boards. For more
details, please refer to the point-to-point diagram provided with the machine.
Here is a brief description of functions of the important boards:
PSU (Power Supply Unit). Supplies AC/DC current to the machine. Also contains the AC drive
board that supplies AC power to the fusing lamp.
MCU (Main Control Unit). This is the engine control board. The MCU manages:
Base engine control, scanning control, image processing control, image writing control.
Basic I/O function control for the power packs, motors, sensors, solenoids, clutches, and
fusing.
Power supply to scanner components (sensors, motors).
RFDB. Drives and controls the components of the optional roll feeder (the motor, clutch,
sensors, and switches).
SFDB (Sheet Feed Driver Board). Controls the operation of the optional paper cassette that
feeds cut sheets.
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