B245/B276/B277/B268/B269 Service Manual 18-Jan-06
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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
SBU (Sensor Board Unit)
The SBU deals with the analog signals from the CCD and converts them into digital signals.
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