units. Here, the internal equalizer circuit reduces the image signals
to a long-distance receiving level.
This is designed to correct the characteristics of the frequency
band centered around 3 kHz and maintain a constant receiving
sensitivity.
It can be set in the service mode.
Refer to
2.3.7.1. CHECK SHEET
().
3. DTMF Transmission (Monitor tone)
The DTMF signal generated in the modem (IC505) is output from
pin 44, and the NCU section to the telephone line the same as
facsimile transmission signals.
(DTMF Monitor Tone)
Refer to
2.3.7.1. CHECK SHEET
().
4. Busy/Dial Tone Detection
The path is the same as FAX receiving. When it is detected, the
carrier detect bit of the resistor in the modem (IC505) becomes 1,
and this status is monitored by ASIC (IC501).
6.7. DESCRIPTION OF BLOCK DIAGRAM IN ANALOG SECTION
1. Function
The analog section serves as an interface between the telephone
line. The digital board (IC505) for transmission and reception of
FAX signals, switches between the digital board (IC505) and other
sections by means of a multiplexer in the NCU section. The control
signals to the individual analog sections are output mainly from
ASIC IC501, and the status information for the various sections is
also held in ASIC IC501. / Simple explanations for the various
sections are given below.
2. Circuit Operation
[NCU Section]
This is the interface between the telephone line and external telephone. This is composed of a
bell detection circuit, pulse dial generation circuit, EXT. TAM OFF-HOOK detect circuit, vox
circuit, amplifier circuit for line transmission and reception, sidetone circuit, etc. /
[Modem (IC505)]
This is used for FAX signal tone modulation, DTMF signal transmission, ring tone generation, and
187
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 ...