Samsung SCX-4200 manual Scan Part, Ope Pannel, Configuration, Micom controller

System Overview

3.2.2 Scan Part

1)Pictorial signal input part: output signal of CIS passes through Bypass Cap change to ADC at IP Main and defined signal between AFE and IP Main processes the Image signal. When AFE accept each pixel, CDS (Correlated Double Sampling) technique which samples arm-level twice is used on each pixel by using IP signal.

2)Pictorial image processing part: read CIS Pixel data in terms of 600dpi Line and process LAT algorithm on text mode, Error Diffusion Algorithm on Mixed mode, and store Data at Scan Buffer on PC Scan mode without algorithm. On every mode Shading Correction and Gamma Correction are executed ahead then processing is executed later.

*Scan Image Control Specification

Minimum Scan Line Time: 1.23ms

Scan Resolution: Max. 600 x 2400 DPI (optical)

Scan Width: 216mm

main function

-Internal 10bit ADC

-White Shading Correction

-Gamma Correction

-CIS Interface

-256 Gray Scale

3)CIS Operating Part : CIS use +3.3V

-CIS Maximum Operating Frequency : 5MHz

-CIS Line time : 1.63ms

-White Data output Voltage : 1.7V -(Mono Copy, 5ms/line)

3.2.3 Ope Pannel

1)Configuration

Operation Panel uses Main Control and separated Ope Chip Micom and work as inner program, systemic operation is serial system which exchange Data with SIO Port of Main Control. Ope Panel is approximately composed of Micom part, Matrix part and LCD.

2)Micom controller

Micom has ROM, RAM, I/O Port built-in and displays and lights LCD by CPU command of Main Control Part and report Key recognition Data to Main Control Board.

Samsung Electronics

Service Manual 3-11