8.5. MODEM SECTION
8.5.1. FUNCTION
The unit uses MODEM (IC600) that serves as an interface between the control section for FAX transmission and reception and
the telephone line. During a transmitting operation, the digital image signals are modulated and sent to the telephone line.
During a receiving operation, the analog image signals which are received via the telephone line are demodulated and
converted into digital image signals. The communication format and procedures for FAX communication are standardized by
ITU-T. MODEM has hardware which sends and detects all of the necessary signals for FAX communication.
It can be controlled by writing commands from the ASIC (IC606: inside ASIC).
This MODEM also sends DTMF signals, generates a call tone (from the speaker), and detects a busy tone and dial tones.
Overview of Facsimile Communication Procedures (ITU-T Recommendation):
1. ON CCITT (International Telegraph and Telephone Consultative Committee)
The No. XIV Group of ITU-T, one of the four permanent organizations of the International Telecommunications Union (ITU),
investigates and make recommendations on international standards for facsimiles.
2. Definition of Each Group
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Group I (G1)
Official A-4 size documents without using formats which reduce the band width of a signal are sent over telephone lines.
Determined in 1968.
Transmission for about 6 minutes at a scanning line density of 3.85 lines/mm.
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Group II (G2)
Using reduction technology in the modulation/demodulation format, an A-4 size document is sent at an official scanning line
density of 3.85 lines/mm for about 3 minutes.
Methods to suppress redundancy are not used.
Determined in 1976.
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Group III (G3)
Method of suppressing redundancy in the image signal prior to modulation is used. An A-4 size document is sent within
about one minute.
Determined in 1980.
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Group IV (G4)
Transmission is via the data network. A method is provided for suppressing redundancy in signals prior to transmission, and
error-free reception of transmission is possible.
The scope of these facsimile applications is not limited simply to transmission of written statements. Through symbiotic
linkages with other communication methods, it can be expected to expand to include integrated services.
3. Facsimile Call Time Series
As shown in the following diagram, the facsimile call time series is divided into five phases.
Phase A : Call setting
Call setting can be manual/automatic.
Phase B : Pre-message procedure
Phase B is a pre-processing procedure and sequence for confirming the status of the terminal, transmission route, etc., and for
terminal control. It implements terminal preparation status, determines and displays terminal constants, confirms
synchronization status, etc. and prepares for transmission of facsimile messages.
Phase C : Message transmission
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KX-FLM652CX
Summary of Contents for KX-FLM652CX
Page 11: ...3 INSTALLATION 3 1 LOCATION OF CONTROLS 3 1 1 OVERVIEW 11 KX FLM652CX ...
Page 24: ...3 4 9 SETTING YOUR LOGO The logo can be your company division or name 24 KX FLM652CX ...
Page 44: ...5 DISASSEMBLY INSTRUCTIONS 44 KX FLM652CX ...
Page 47: ...5 3 HOW TO REMOVE THE OPERATION PANEL ASS Y 47 KX FLM652CX ...
Page 48: ...5 4 HOW TO REMOVE THE PICK UP UNIT 48 KX FLM652CX ...
Page 49: ...5 5 HOW TO REMOVE THE PICK UP ROLLER 49 KX FLM652CX ...
Page 50: ...5 6 HOW TO REMOVE THE OPERATION BOARD 50 KX FLM652CX ...
Page 51: ...5 7 HOW TO REMOVE THE LOWER FRAME 5 8 HOW TO REMOVE THE SEPARATION RUBBER 51 KX FLM652CX ...
Page 52: ...5 9 HOW TO REMOVE THE TRANSFER ROLLER 52 KX FLM652CX ...
Page 53: ...5 10 HOW TO REMOVE THE SEPARATION ROLLER 53 KX FLM652CX ...
Page 54: ...5 11 HOW TO REMOVE THE BOTTOM PLATE 5 12 HOW TO REMOVE THE ANALOG BOARD 54 KX FLM652CX ...
Page 56: ...5 15 HOW TO REMOVE THE FAN UNIT 5 16 HOW TO REMOVE THE LOW VOLTAGE POWER BOARD 56 KX FLM652CX ...
Page 57: ...5 17 HOW TO REMOVE THE SOLENOID 5 18 HOW TO REMOVE THE HANDSET HOLDER 57 KX FLM652CX ...
Page 58: ...5 19 HOW TO REMOVE THE MAIN MOTOR 58 KX FLM652CX ...
Page 59: ...5 20 HOW TO REMOVE THE FUSER UNIT 59 KX FLM652CX ...
Page 60: ...5 21 HOW TO REMOVE THE CIS 60 KX FLM652CX ...
Page 62: ...5 23 INSTALLATION POSITION OF THE LEAD 62 KX FLM652CX ...
Page 101: ...6 6 7 6 LIGHT PRINT CROSS REFERENCE HIGH VOLTAGE SECTION P 148 101 KX FLM652CX ...
Page 103: ...6 6 7 8 BLANK PRINT 6 6 7 9 BLACK OR WHITE POINT 103 KX FLM652CX ...
Page 105: ...6 6 8 3 SKEW 105 KX FLM652CX ...
Page 111: ...CROSS REFERENCE MOTOR SECTION P 143 111 KX FLM652CX ...
Page 112: ...6 6 9 2 SKEW ADF 112 KX FLM652CX ...
Page 114: ...6 6 9 5 THE RECEIVED OR COPIED DATA IS EXPANDED 114 KX FLM652CX ...
Page 115: ...6 6 9 6 BLACK OR WHITE VERTICAL LINE IS COPIED 115 KX FLM652CX ...
Page 125: ...125 KX FLM652CX ...
Page 128: ...CROSS REFERENCE TEST FUNCTIONS P 69 128 KX FLM652CX ...
Page 129: ...CROSS REFERENCE TEST FUNCTIONS P 69 129 KX FLM652CX ...
Page 130: ...CROSS REFERENCE TEST FUNCTIONS P 69 130 KX FLM652CX ...
Page 131: ...CROSS REFERENCE TEST FUNCTIONS P 69 131 KX FLM652CX ...
Page 132: ...132 KX FLM652CX ...
Page 133: ...133 KX FLM652CX ...
Page 134: ...CROSS REFERENCE TEST FUNCTIONS P 69 134 KX FLM652CX ...
Page 143: ...6 6 13 6 MOTOR SECTION 6 6 13 6 1 ENGINE MOTOR 143 KX FLM652CX ...
Page 144: ...6 6 13 6 2 ADF MOTOR 144 KX FLM652CX ...
Page 145: ...6 6 13 7 LSU SECTION CROSS REFERENCE LSU Laser Scanning Unit SECTION P 183 145 KX FLM652CX ...
Page 146: ...6 6 14 CIS Contact Image Sensor SECTION CROSS REFERENCE TEST FUNCTIONS P 69 146 KX FLM652CX ...
Page 148: ...6 6 16 HIGH VOLTAGE SECTION 148 KX FLM652CX ...
Page 149: ...149 KX FLM652CX ...
Page 150: ...150 KX FLM652CX ...
Page 153: ...6 6 17 2 TROUBLESHOOTING FLOW CHART 153 KX FLM652CX ...
Page 154: ...154 KX FLM652CX ...
Page 155: ...7 CIRCUIT OPERATIONS 7 1 CONNECTION DIAGRAM 155 KX FLM652CX ...
Page 177: ...7 7 1 2 ENGINE MOTOR DRIVE CIRCUIT 177 KX FLM652CX ...
Page 183: ...7 10 LSU Laser Scanning Unit SECTION 183 KX FLM652CX ...
Page 184: ...184 KX FLM652CX ...
Page 191: ...191 KX FLM652CX ...
Page 213: ...8 1 11 Timing Chart Initializing Long 213 KX FLM652CX ...
Page 215: ...8 2 TERMINAL GUIDE OF THE ICs TRANSISTORS AND DIODES 8 2 1 DIGITAL BOARD 215 KX FLM652CX ...
Page 216: ...8 2 2 ANALOG BOARD 8 2 3 OPERATION BOARD 8 2 4 MOTOR DRIVER BOARD 216 KX FLM652CX ...
Page 217: ...8 2 5 HIGH VOLTAGE POWER BOARD 217 KX FLM652CX ...
Page 218: ...8 2 6 LOW VOLTAGE POWER BOARD 8 2 7 DRUN AND TONER SENSOR BOARD PARTS 218 KX FLM652CX ...
Page 221: ...8 4 1 NG EXAMPLE 221 KX FLM652CX ...
Page 227: ...227 KX FLM652CX ...
Page 228: ...8 6 TEST CHART 8 6 1 ITU T No 1 TEST CHART 228 KX FLM652CX ...
Page 229: ...8 6 2 ITU T No 2 TEST CHART 229 KX FLM652CX ...
Page 230: ...9 FIXTURES AND TOOLS 230 KX FLM652CX ...
Page 231: ...10 CABINET MECHANICAL AND ELECTRICAL PARTS LOCATION 10 1 GENERAL SECTION 231 KX FLM652CX ...
Page 232: ...10 2 OPERATION COVER SECTION 1 232 KX FLM652CX ...
Page 233: ...10 3 OPERATION COVER SECTION 2 233 KX FLM652CX ...
Page 234: ...10 4 OPERATION COVER SECTION 3 234 KX FLM652CX ...
Page 235: ...10 5 PICK UP SECTION 235 KX FLM652CX ...
Page 236: ...10 6 FUSER SECTION 236 KX FLM652CX ...
Page 237: ...10 7 UPPER MAIN CABINET SECTION 237 KX FLM652CX ...
Page 238: ...10 8 LOWER MAIN CABINET SECTION 1 238 KX FLM652CX ...
Page 239: ...10 9 LOWER MAIN CABINET SECTION 2 239 KX FLM652CX ...
Page 240: ...10 10 LOWER MAIN CABINET SECTION 3 240 KX FLM652CX ...
Page 241: ...10 11 ACTUAL SIZE OF SCREWS AND WASHER 241 KX FLM652CX ...
Page 242: ...11 ACCESSORIES AND PACKING MATERIALS 242 KX FLM652CX ...
Page 261: ...261 KX FLM652CX ...
Page 270: ...15 8 MEMO 270 KX FLM652CX ...
Page 278: ...278 KX FLM652CX ...
Page 286: ...286 KX FLM652CX K N KXFLM652CX ...