7.7. MODEM SECTION
7.7.1. FUNCTION
The unit uses a 1 chip modem (IC505) 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. This 1 chip modem (IC505) has hardware which sends and detects all of the necessary signals for FAX communication.
It can be controlled by writing commands from the CPU (IC501: inside ASIC) to the register in the modem (IC505).
This modem (IC505) 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
·
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.
·
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.
·
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.
·
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.
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KX-FP362CX
Содержание KX-FP362CX
Страница 21: ...4 1 2 COMPONENT LOCATIONS 21 KX FP362CX ...
Страница 31: ...5 2 DISASSEMBLY PROCEDURE 5 2 1 HOW TO REMOVE THE PAPER TRAY AND RECORDING PAPER SUPPORT 31 KX FP362CX ...
Страница 32: ...5 2 2 HOW TO REMOVE THE OPERATION PANEL BLOCK 32 KX FP362CX ...
Страница 33: ...5 2 3 HOW TO REMOVE THE OPERATION BOARD AND LCD 33 KX FP362CX ...
Страница 34: ...5 2 4 HOW TO REMOVE THE IMAGE SENSOR CIS 34 KX FP362CX ...
Страница 35: ...5 2 5 HOW TO REMOVE THE THERMAL HEAD 35 KX FP362CX ...
Страница 36: ...5 2 6 HOW TO REMOVE THE PLATEN ROLLER AND BACK COVER 36 KX FP362CX ...
Страница 37: ...5 2 7 HOW TO REMOVE THE PICKUP ROLLER 37 KX FP362CX ...
Страница 38: ...5 2 8 HOW TO REMOVE THE CASSETTE LEVER 38 KX FP362CX ...
Страница 39: ...5 2 9 HOW TO REMOVE THE BOTTOM FRAME 39 KX FP362CX ...
Страница 40: ...5 2 10 HOW TO REMOVE THE DIGITAL ANALOG POWER SUPPLY SENSOR BOARDS AND AC INLET 40 KX FP362CX ...
Страница 41: ...5 2 11 HOW TO REMOVE THE MOTOR BLOCK AND SEPARATION ROLLER 41 KX FP362CX ...
Страница 42: ...5 2 12 HOW TO REMOVE THE GEARS OF MOTOR BLOCK 42 KX FP362CX ...
Страница 43: ...5 3 INSTALLATION POSITION OF THE LEAD WIRES 43 KX FP362CX ...
Страница 55: ...6 5 THE EXAMPLE OF THE PRINTED LIST 6 5 1 USER MODE Note The above values are the default values 55 KX FP362CX ...
Страница 56: ...6 5 2 SREVICE MODE SETTINGS Note The above values are the default values 56 KX FP362CX ...
Страница 70: ...70 KX FP362CX ...
Страница 84: ...84 KX FP362CX ...
Страница 85: ...CROSS REFERENCE TEST FUNCTIONS P 49 85 KX FP362CX ...
Страница 86: ...CROSS REFERENCE TEST FUNCTIONS P 49 86 KX FP362CX ...
Страница 87: ...CROSS REFERENCE TEST FUNCTIONS P 49 87 KX FP362CX ...
Страница 88: ...CROSS REFERENCE TEST FUNCTIONS P 49 88 KX FP362CX ...
Страница 89: ...89 KX FP362CX ...
Страница 90: ...90 KX FP362CX ...
Страница 91: ...CROSS REFERENCE TEST FUNCTIONS P 49 91 KX FP362CX ...
Страница 95: ...95 KX FP362CX ...
Страница 99: ...I O and Pin No Diagram 99 KX FP362CX ...
Страница 100: ...6 6 7 1 CHECK THE STATUS OF THE DIGITAL BOARD CROSS REFERENCE NG Wave pattern Refer to NG EXAMPLE P 97 100 KX FP362CX ...
Страница 103: ...6 6 7 3 NG EXAMPLE 103 KX FP362CX ...
Страница 107: ...Note Refer to CHECK SHEET P 104 and TEST FUNCTIONS P 49 107 KX FP362CX ...
Страница 109: ...6 6 10 2 TROUBLESHOOTING FLOW CHART 109 KX FP362CX ...
Страница 115: ...6 6 14 THERMAL HEAD SECTION Refer to THERMAL HEAD P 129 115 KX FP362CX ...
Страница 116: ...7 CIRCUIT OPERATIONS 7 1 CONNECTION DIAGRAM 116 KX FP362CX ...
Страница 118: ...7 2 1 GENERAL BLOCK DIAGRAM 118 KX FP362CX ...
Страница 120: ...7 3 2 MEMORY MAP 120 KX FP362CX ...
Страница 128: ...7 4 2 BLOCK DIAGRAM 128 KX FP362CX ...
Страница 131: ...TIMING CHART i Print Duty 50 or less ii Print Duty more than 50 131 KX FP362CX ...
Страница 143: ...b Redundancy Compression Process Coding Mode This unit uses one dimensional MH format 143 KX FP362CX ...
Страница 150: ...150 KX FP362CX ...
Страница 157: ...8 REFERENCE MATERIAL DATA 8 1 TERMINAL GUIDE OF THE ICs TRANSISTORS AND DIODES 157 KX FP362CX ...
Страница 160: ...8 3 TEST CHART 8 3 1 ITU T No 1 TEST CHART 160 KX FP362CX ...
Страница 161: ...8 3 2 ITU T No 2 TEST CHART 161 KX FP362CX ...
Страница 162: ...9 FIXTURES AND TOOLS 162 KX FP362CX ...
Страница 163: ...10 CABINET MECHANICAL AND ELECTRICAL PARTS LOCATION 10 1 GENERAL SECTION 163 KX FP362CX ...
Страница 164: ...10 2 OPERATION PANEL SECTION 164 KX FP362CX ...
Страница 165: ...10 3 BACK COVER SECTION 165 KX FP362CX ...
Страница 166: ...166 KX FP362CX ...
Страница 167: ...10 4 UPPER CABINET SECTION 167 KX FP362CX ...
Страница 168: ...10 5 LOWER CABINET P C BOARD SECTION CROSS REFERENCE MOTOR SECTION P 169 168 KX FP362CX ...
Страница 169: ...10 6 MOTOR SECTION 10 7 ACTUAL SIZE OF SCREWS 169 KX FP362CX ...
Страница 170: ...11 ACCESSORIES AND PACKING MATERIALS 170 KX FP362CX ...