IMAGE PROCESSING
SM 2-5 A265/A267
Detailed
Descriptions
2.2 IMAGE PROCESSING
2.2.1 OVERVIEW
The CCD generates an analog video signal. The SBU (Sensor Board Unit)
converts the analog signal to an 8-bit digital signal, then it sends the digital signal
to the BICU (Base-engine and Image Control Unit) board.
The BICU board and LDD Board can be divided into three image processing
blocks; the IPU (Image Processing Unit), FCI (Fine Character Image), and LD
controller (VCU).
•
IPU: Auto shading, filtering, magnification,
γ
correction, and gradation processing
•
LD controller: LD print timing control and laser power PWM control
•
FCI (inside the LD controller): Smoothing (binary picture processing mode only)
The EMB board is the copier feature expander option, which provides extra
memory for the copier features.
IPU
Drum
BICU
LDD
SBU
CCD
FCI
LD
Controller
(VCU)
LD
Driver
MB
EMB
Memory
Control
IC
Scanner Controller
Fax Controller
Printer Controller
A265D500.WMF
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