Iob; Fcu; Opu; Msens1 (Proximity Sensor (Human Detection Sensor), Msens2 (Proximity Sensor (Human Detection Sensor) Board) - Ricoh MP C2504 Field Service Manual

7. Detailed Descriptions
LDB
LD control circuit which drives the laser diode with a universal driver.
BCU
Controls the engine.
IPU
Processes digital signals.
The SIO functions are included in the IPU for this machine. Thus the SIO board is removed.
SIO Function
Circuit which controls generation of SBU power, scanner internal sensor I/F, carriage drive
stepping motor and LED drive.
MSENS1 (Proximity Sensor (Human Detection Sensor), MSENS2 (Proximity Sensor
(Human Detection Sensor) Board)
Proximity sensors (human detection sensors) and proximity sensor (human detection sensor) board 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 control panel.
HVP (Composite High-Voltage Power Supply TTS/CB)
Generates the high-voltage power required for process control. Divided into two units, i.e., transfer (TTS)
and electrostatic/developing (CB).
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