Controller
Controls the MFP system overall. Comprises an x86CPU, controller ASIC, IO control ASIC, and RAM.
SBU (PCB7)
Scanning control circuit which performs analog signal processing and AD image conversion of the CCD scanned image.
It also has an IPU I/F, and controls scanner input-output signals according to CPU commands.
LDB (PCB14) (PCB15)
LD control circuit which drives the laser diode with a universal driver.
BICU (PCB10)
Controls the engine and processes digital signals.
The IPU (SIO) functions are included in BICU.
SIO Function
The circuit which controls the generation of SBU power, scanner internal sensor I/F, carriage drive stepping motor and LED drive.
MSENS1 (Proximity Sensor), MSENS2 (Proximity Sensor Board)
Proximity Sensors (S49) and Proximity Sensor Board (PCB18) are equipped.
People are detected by IR sensors which sense the temperature difference between the human body and the temperature of the machine location.
IOB
Controls the MFP engine sensor, motor, and solenoid.
FCU
Controls the fax program.
OPU
Controls the operation panel.
HVP (composite high-voltage power supply TTS/CB) (PCB16) (PCB19)
Generates the high-voltage power required for process control. Divided into two units, i.e., transfer (TTS) and electrostatic/developing (CB).
PSU (PCB8) (PCB9)
Generates DC power from a commercial AC power supply, and supplies it to each control circuit. Comprises an A/C drive circuit for controlling the fixing heater.