Ricoh D109 Service Training page 30

Slide 30
The scanned image is processed by the following modules.
In the SBU
CCD: Converts the reflected light from the image into an analog signal.
Driven by the CALDA.
Amp: Amplifies the analog signal and sends it to the AFE on the BICU.
In the BICU
IPU: Auto shading, filtering, magnification, scanner gamma correction, ID
gamma correction
VCU: Printer gamma correction, LD print timing control and laser power
PWM control
FCI (inside the VCU): Smoothing
The data then moves to the LD drive board in accordance with timing
controlled by the BICU.
CALDA: CCD drive, AFE drive, Data conversion, Offset correction
AFE: Analog digital converter, Gain adjustment, Offset adjustment (Analog
Front End)
Image Processing - Overview
30
S-C4L Training