(Cause and Countermeasure)
As shown in the chart above, the total handshaking time must be reduced, but because of the
long distance connection and linking of several stations, the line connection time cannot be
reduced. Accordingly, the following countermeasures should be tried.
(A)... As the 35 sec. count is started directly after dialing or directly after the START button has
been pressed for models with a START button, the other party should be called manually, if
possible. Another possibility is entering two pauses at the end of the auto dial number on the
transmission side. Then the count start time can be delayed for 2 pauses (about 10 sec.).
Cause 2:
Erroneous detection because of an echo or an echo canceler.
(Echo/Echo Canceler)
The signal from FAX1 reaches FAX2 via stations 1 and 2, but the reflection signal at station 2 also
returns via station 1 (echo). As the distance between station 1 and station 2 is far, the echo
returns to FAX 1 at a max of 600 msec after transmission. There is a possibility that this signal is
detected erroneously as the signal from FAX2. For a normal call, there is also a possibility that
the echo of their own voice will make the call difficult to understand. For this reason, each station
(station 1 and station 2) attaches echo cancelers (S1 and S2) for international lines or long
distance lines. For the echo canceler, the level of the transmission signal from FAX 1 is compared
with the level of the reception signal from FAX2. When the transmission signal is larger, S1 is
closed while S2 is opened when it is smaller. In other words, for transmission from FAX1, S1 is
closed and S2 is open, so that the echo does not return to FAX1.
(Causes and Countermeasures)
(Cause A)
When a training signal is transmitted from FAX1 during the communication procedure at the time
of transmission from FAX1 to FAX2, there is a delay until the echo canceler operates. S1 is closed
so that a part of the head of the training signal may drop out. Normal reception by FAX2 may not
be possible, and transmission may not be started.
(Countermeasure A)
When the international line mode is ON in the service mode (code No. 521), a dummy signal is
attached to the head of the training signal to prevent this problem. As this is normally ON, it is
necessary to reconfirm that this has not become OFF. When the international mode is switched
66
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 ...