System Overview
Samsung Electronics
Service Manual
3-11
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.
