6.6.2. MODEM CIRCUIT OPERATION
The modem (IC505) has all the hardware satisfying the ITU-T standards mentioned previously.
When the ASIC IC501 (61) is brought to a low level, the modem (IC505) is chip-selected and the
resistors inside IC are selected by the select signals from ASIC (IC501) ADR0-ADR4(pin 83~87).
Commands are written through the data bus, and all processing is controlled by the ASIC (IC501)
according to ITU-T procedures. Here, the INT signal dispatched from IRQ (pin 60 of IC505) to the
ASIC (IC501) implements post processing.
This modem (IC505) has an automatic application equalizer. With training signal 1 or 2 at the time
of G3 reception, it can automatically establish the optimum equalizer. The modem (IC505) clock is
supplied by pin 55 of ASIC (IC501).
1. Facsimile Transmission/DTMF Line Send
The digital image data on the data bus is modulated in the modem
(IC505), and sent from pin 44 via amplifier IC501(2 1), Analog SW
IC509(1 2), amplifier IC511(2 1) and the NCU section to the
telephone line.
Refer to
2.3.7.1. CHECK SHEET
().
2. Facsimile Reception
The analog image data which is received from the telephone line
passes through the NCU section and enters pin 45 of the modem
(IC505). The signals that enter pin 45 of the modem (IC505) are
demodulated in the board to digital image signals, then placed on
the data bus.
In this case, the image signals from the telephone line are
transmitted serially. Hence, they are placed on the bus in 8 bit
186
Содержание KX-FP80C
Страница 9: ...1 10 OPTIONAL ACCESSORIES 1 11 TEST CHART 1 11 1 ITU T No 1 TEST CHART 9 ...
Страница 10: ...1 11 2 ITU T No 2 TEST CHART 10 ...
Страница 11: ...1 12 LOCATION OF CONTROLS 1 12 1 OVERVIEW 11 ...
Страница 24: ...2 Push the back cover open button and open the back cover 24 ...
Страница 30: ...1 15 2 1 MAINTENANCE LIST 30 ...
Страница 38: ...Note Do not pull out the jammed paper forcibly before opening the front cover 38 ...
Страница 40: ...2 Push the back cover open button and open the back cover 40 ...
Страница 45: ...CROSS REFERENCE 2 5 TEST FUNCTIONS 2 3 4 ADF Auto Document Feed SECTION 2 3 4 1 NO DOCUMENT FEED 45 ...
Страница 49: ... Fig B 2 3 4 3 DOCUMENT JAM CROSS REFERENCE 2 3 10 SENSOR SECTION 4 DISASSEMBLY INSTRUCTIONS 2 3 4 4 SKEW 49 ...
Страница 56: ...Fig C 2 3 4 12 ABLANK PAGE IS RECEIVED 56 ...
Страница 71: ...71 ...
Страница 72: ...CROSS REFERENCE 2 5 TEST FUNCTIONS 72 ...
Страница 73: ...CROSS REFERENCE 2 5 TEST FUNCTIONS 73 ...
Страница 74: ...CROSS REFERENCE 2 5 TEST FUNCTIONS 74 ...
Страница 75: ...CROSS REFERENCE 2 5 TEST FUNCTIONS 75 ...
Страница 76: ...76 ...
Страница 77: ...77 ...
Страница 78: ...78 ...
Страница 90: ...2 3 6 3 CHECK THE STATUS OF THE DIGITAL BOARD 90 ...
Страница 93: ...3 No ring tone or No bell CROSS REFERENCE 2 3 7 1 CHECK SHEET 93 ...
Страница 96: ...2 3 8 2 TOROUBLESHOOTING FLOW CHART 96 ...
Страница 97: ...97 ...
Страница 98: ...98 ...
Страница 102: ...CROSS REFERENCE 2 5 TEST FUNCTIONS 102 ...
Страница 103: ...2 3 12 THERMAL HEAD SECTION Refer to 6 4 3 THERMAL HEAD 103 ...
Страница 105: ...2 4 3 USER MODE The list below is an example of the SYSTEM SETUP LIST the unit prints out 105 ...
Страница 106: ...Note The above values are the default values 2 4 4 SERVICE FUNCTION TABLE 106 ...
Страница 117: ...117 ...
Страница 119: ...CROSS REFERENCE 2 5 1 DTMF SINGLE TONE TRANSMIT SELECTION 2 5 2 BUTTON CODE TABLE 2 5 3 PRINT TEST PATTERN 119 ...
Страница 122: ...2 Left margin Top margin Reference pattern 122 ...
Страница 123: ...3 Thermal head 1 dot Reference pattern 123 ...
Страница 124: ...4 Use this test pattern to confirm the torque limiter for Ink film and platen roller timing Reference pattern 124 ...
Страница 127: ...4 2 HOW TO REMOVE THE OPERATION PANEL BLOCK 127 ...
Страница 128: ...4 3 HOW TO REMOVE THE OPERATION BOARD AND LCD 128 ...
Страница 129: ...4 4 HOW TO REMOVE THE ANALOG DIGITAL AND POWER BOARDS AND AC INLET 129 ...
Страница 130: ...4 5 HOW TO REMOVE THE MOTOR BLOCK 130 ...
Страница 131: ...131 ...
Страница 132: ...4 6 HOW TO REMOVE THE SEPARATION ROLLER 132 ...
Страница 133: ...4 7 HOW TO REMOVE THE IMAGE SENSOR CIS 133 ...
Страница 134: ...4 8 HOW TO REMOVE THE TERMAL HEAD 134 ...
Страница 135: ...4 9 HOW TO REMOVE THE PLATEN ROLLER BACK COVER 135 ...
Страница 136: ...4 10 HOW TO REMOVE THE PICKUP ROLLER 136 ...
Страница 137: ...4 11 HOW TO REMOVE THE CASSETTE PLATE 137 ...
Страница 138: ...4 12 HOW TO REMOVE THE DOCUMENT TRAY 138 ...
Страница 139: ...4 13 INSTALLATION POSITION OF THE LEAD WIRES 139 ...
Страница 146: ...6 7 1 ANALOG UNIT BLOCK DIAGRAM 6 3 CONTROL SECTION 6 3 1 BLOCK DIAGRAM 6 3 2 MEMORY MAP 146 ...
Страница 147: ...6 3 3 ASIC IC501 This custom IC is used for the general FAX operations 147 ...
Страница 149: ...149 ...
Страница 152: ...58 TEST3 I 5V HIGH FIXED 152 ...
Страница 154: ...102 RBA4 O 5V ROM RAM BANK ADDRESS 4 154 ...
Страница 170: ...Note See Sensor Locations in 6 5 SENSORS AND SWITCHES 6 4 6 3 2 TRANSMITTING DOCUMENTS 170 ...
Страница 171: ...CROSS REFERENCE 2 3 10 SENSOR SECTION 6 4 6 3 3 RECEIVING FAX 171 ...
Страница 172: ...Note See Sensor Locations in 6 5 SENSORS AND SWITCHES 6 4 6 3 4 COPYING 172 ...
Страница 196: ...AND DIODES 8 FIXTURES AND TOOLS 196 ...
Страница 197: ...9 CABINET MECHANICAL AND ELECTRICAL PARTS LOCATION 9 1 OPERATION PANEL SECTION 197 ...
Страница 198: ...9 2 UPPER CABINET SECTION 198 ...
Страница 199: ...9 2 1 BACK COVER SECTION 9 2 1 1 BACK COVER 1 199 ...
Страница 200: ...9 2 1 2 BACK COVER 2 200 ...
Страница 201: ...9 3 LOWER P C B SECTION 201 ...
Страница 202: ...CROSS REFERENCE 9 1 OPERATION PANEL SECTION 9 4 MOTOR SECTION 202 ...
Страница 203: ...9 5 ACTUAL SIZE OF SCREWS AND WASHER 10 ACCESSORIES AND PACKING MATERIALS 203 ...
Страница 204: ...11 REPLACEMENT PARTS LIST 204 ...