Chapter 6 Principle of OperationChapter 6 Principle of Operation CONTENTSVersion 1 2006.11.211. Telephone System......................................................................................................6 - 11.1 Converting and Sending Voice in the Form of Electrical Signals..................................................... 6 - 11.2 Analog and Digital Signals ............................................................................................................... 6 - 32. Telephone Call Connection Mechanism.....................................................................6 - 62.1 Analog Telephone Network.............................................................................................................. 6 - 62.2 Telephone Call Connection Mechanism .......................................................................................... 6 - 73. Terminology..............................................................................................................6 - 104. FAX System (Overview) ...........................................................................................6 - 115. Unit Mechanisms ......................................................................................................6 - 136. FAX Standards (ITU-T Recommendations)..............................................................6 - 167. Fault Isolation Procedure for FAX ............................................................................6 - 177.1 Fault Occurs................................................................................................................................... 6 - 177.2 Send Fault...................................................................................................................................... 6 - 177.3 Receive Fault ................................................................................................................................. 6 - 188. Other Problems ........................................................................................................6 - 199. Document Scanning .................................................................................................6 - 209.1 Document Scanning at Platen (IIT)................................................................................................ 6 - 219.2 Document Scanning at ADF .......................................................................................................... 6 - 229.2.1 Setting a Document ............................................................................................................... 6 - 239.2.2 Preparation for Feed .............................................................................................................. 6 - 239.2.3 Prefeed .................................................................................................................................. 6 - 239.2.4 Preregistration........................................................................................................................ 6 - 249.2.5 Scan Control .......................................................................................................................... 6 - 249.2.6 Simplex Document................................................................................................................. 6 - 2510. Image Data Flow ....................................................................................................6 - 2611. Drive Torque Transfer Scheme ..............................................................................6 - 2711.1 ADF Motor.................................................................................................................................... 6 - 2711.2 Gear Layout ................................................................................................................................. 6 - 2812. Names and Functions of Components ...................................................................6 - 2912.1 IIT................................................................................................................................................. 6 - 2912.2 ADF.............................................................................................................................................. 6 - 3113. Control ....................................................................................................................6 - 3313.1 Document Scanning Steps .......................................................................................................... 6 - 3313.1.1 AGC (Auto Gain Control): White Level Variation Adjustment .............................................. 6 - 3313.1.2 AOC (Auto Offset Control) ................................................................................................... 6 - 3313.1.3 Shading Compensation........................................................................................................ 6 - 3313.2 CCD Image Sensor Overview...................................................................................................... 6 - 3413.3 System Configuration................................................................................................................... 6 - 35
