26 March 1998BOARD STRUCTURE
1.9.2 DESCRIPTIONS
1. BICU (Base Engine and Image Control Unit)
This is the main board. It controls the following functions.Overall
Information
? Engine sequence
? Timing control for peripherals
? Image processing, video control
? Operation control
? Application boards (fax, printer, hard disk)
2. IOB (Input/Output Board)
The IOB handles the following functions.
? Drive control for the sensors, motors, and solenoids of the printer
? PWM control for high voltage supply board
? Serial interface with peripherals
? Fusing control
3. SBU (Sensor Board Unit)
The SBU receives the analog signals from the CCD and converts them into digital
signals.
4. SIB (Scanner Interface Board)
This board controls the scanner motor and passes signals between the BICU board
and the component parts of the scanner unit. Also, it transmits the video signals
from the SBU to the BICU board.
5. SIFB (Scanner Interface Board)
This board passes signals between the SIB and BICU.
6. Mother Board (Option)
This board interfaces the BICU with the fax controller and/or the printer controller.
The mother board is part of the expansion box option.
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ACEC
