BOARD STRUCTURE
B121 Series/B259 Series 6-6 SM
1. BICU (Base Engine and Image Control Unit)
The main board controls the following functions:
• Engine sequence
• Timing control for peripherals
• Image processing, video control
• Operation control, system control (Basic machine only)
• Machine control
• Drive control for the sensors, motors, and clutches of the printer and scanner
• High voltage supply board control
• Serial interfaces with peripherals
• Fusing control
2. SBU (Sensor Board Unit)
The SBU deals with the analog signals from the CCD and converts them into digital
signals.
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