Samsung CLX-3185 Service Manual page 31

- Signal Transition of DAA Solution
1) Line Interface Signal of Tel Line and LSD is Analog Signal.
2) there is A/D, D/A Converter in LSD, so Analog Signal from Tel Line is converted in Digital through A/D
Converter in DAA and transfer to SSD by DIB Capacitor
Digital Signal from SSD is converted to Analog by D/A Converter in DAA and transfer to Tel Line
3) Transformer transfer Clock from SSD to LSD and Clock Frequency is 4.032MHz.
LSD full wave rectifies Clock to use as inner Power supply and also use as Main Clock for DIB Protocol
Sync between LSD and SSD. Transformer transfer Clock by separating Primary and Secondary, and
amplifies Clock Level to LSD by Coil Turns Ratio 1:1.16.
⑫ 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 1200dpi 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
① Minimum Scan Line Time: 0.5ms @mono 300dpi
② Scan Resolution: Max. 1200*2400dpi
③ Scan Width: 216mm
④ main function
- White Shading Correction
- Gamma Correction
- CIS Interface
- 256 Gray Scale
3) CIS Operating Part : CMOS Sensor use +3.3V
- CIS Maximum Operating Frequency : 5MHz
- CIS Line time : 0.75ms @mono 300dpi (TBD)
- White Data output Voltage : 1.7V -(Mono Copy, 5ms/line)
Service Manual
Product spec and feature
2-22
Samsung Electronics