Service manual

Samsung Electronics 5-13
5-1-4 SCANNER
5-1-4-1. SUMMARY
This product has CCD(Charge Coupled Device) as an image sensor to receive image input signals and has
embodied a shuttle scanner, realizing various scanner control signals and image processing with color image
processor CIP1A(U17), which is ASIC for shuttle scan. We are going to look into the principles by explaining
the whole data flow in the scanner, block diagram of CIP1A, allocated I/O port and peripheral circuits.
5-1-4-2. CIP1A(U17)
The inside of ASIC is roughly divided into A/D Converter to convert image signals to digital signals, Scanner
Controller to provide various CCD driving signals and signals to interface with host controller, and Image
Processor for shading compensation, gamma compensation and reasoning of image signals.
CCD
Module
CIP-1A
A/D
Converter
Scanner
Controller
MFP
Controller
Image
Processor
Data
Memory
Analog
Data
CCD
Control
Pixel
Data
Digitized
Data
DMA
Control
System
Data BUS
Data
Timing
IP
Control
CIP-I Control Data
+
Formatted Data for DMA
Formatted Data for DMA
CIP-I Control Data
Processed
Data
A/D
Sample
Clock
fig.5-1-11 CIP1A Block Diagram