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Soldering faults difficult to detect with the naked eye are common, particularly for ASIC and RA
(Resistor Array). But if you have an oscilloscope, you can easily determine the problem site or
IC malfunction by checking the main signal lines.
Even if you don’t have such a measuring instrument, by checking each main signal line and
resoldering it, in many cases the problem will be resolved.
An explanation of the main signals (for booting up the unit) is presented below.
What are the main signals for booting up the unit?
Please refer to
DIGITAL BLOCK DIAGRAM
().
The ASIC (IC501) controls all the other digital ICs. When the power is turned on, the ASIC
retrieves the operation code stored in the ROM (IC502), then follows the instructions for
controlling each IC. All ICs have some inner registers that are assigned to a certain address.
It is the address bus by which the ASIC designates the location inside each IC. And the data bus
reads or writes the data in order to transmit the instructions from the ASIC to the ICs.
These signal lines are all controlled by voltages of 5V (H) or 0V (L).
2.3.6.1. DIGITAL BLOCK DIAGRAM
You also need to check the signal lines listed here [List 1] when the unit fails to boot up the
system. Those signal lines should remain normal. Other signal lines are not directly related to
that failure even if they have faults or troubles.
87
Содержание KX-FM89BX
Страница 11: ...1 11 2 ITU T No 2 TEST CHART 11 ...
Страница 12: ...1 12 LOCATION OF CONTROLS 1 12 1 OVERVIEW 12 ...
Страница 28: ...3 Open the back cover 4 Pull out the blue gear side and remove the used ink film Remove the used core 28 ...
Страница 49: ...Fig B 49 ...
Страница 57: ...Fig C 2 3 4 12 A BLANK PAGE IS RECEIVED 57 ...
Страница 73: ...73 ...
Страница 74: ...CROSS REFERENCE TEST FUNCTIONS 74 ...
Страница 75: ...CROSS REFERENCE TEST FUNCTIONS 75 ...
Страница 76: ...CROSS REFERENCE TEST FUNCTIONS 76 ...
Страница 77: ...CROSS REFERENCE TEST FUNCTIONS 77 ...
Страница 78: ...78 ...
Страница 79: ...79 ...
Страница 80: ...80 ...
Страница 91: ...CROSS REFERENCE NG EXAMPLE CHECK THE STATUS OF THE DIGITAL BOARD POWER SUPPLY BOARD SECTION 91 ...
Страница 94: ...2 3 6 4 CHECK THE STATUS OF THE DIGITAL BOARD 94 ...
Страница 96: ...96 ...
Страница 99: ...Note Inside the digital board Inside the operation board 2 3 8 1 2 FOR KX FM89CX 99 ...
Страница 101: ...investigation 2 No pulse dialing 3 No ring tone or No bell 101 ...
Страница 105: ...2 3 10 2 TOROUBLESHOOTING FLOW CHART 105 ...
Страница 106: ...106 ...
Страница 107: ...107 ...
Страница 111: ...CROSS REFERENCE TEST FUNCTIONS 111 ...
Страница 112: ...2 3 14 THERMAL HEAD SECTION Refer to THERMAL HEAD 112 ...
Страница 123: ...Note The above values are the default values 2 5 4 SERVICE FUNCTION TABLE 123 ...
Страница 139: ...2 Left margin Top margin Reference pattern 139 ...
Страница 140: ...3 Thermal head 1 dot Reference pattern 140 ...
Страница 141: ...4 Use this test pattern to confirm the torque limiter for Ink film and platen roller timing Reference pattern 141 ...
Страница 145: ...4 3 HOW TO REMOVE THE OPERATION PANEL BLOCK 145 ...
Страница 146: ...4 4 HOW TO REMOVE THE OPERATION BOARD AND LCD 146 ...
Страница 147: ...4 5 HOW TO REMOVE THE ANALOG DIGITAL AND POWER BOARDS AND AC INLET 147 ...
Страница 148: ...4 6 HOW TO REMOVE THE MOTOR BLOCK 148 ...
Страница 149: ...149 ...
Страница 150: ...4 7 HOW TO REMOVE THE SEPARATION ROLLER 150 ...
Страница 151: ...4 8 HOW TO REMOVE THE IMAGE SENSOR CIS 151 ...
Страница 152: ...4 9 HOW TO REMOVE THE TERMAL HEAD 152 ...
Страница 153: ...4 10 HOW TO REMOVE THE PLATEN ROLLER BACK COVER 153 ...
Страница 154: ...4 11 HOW TO REMOVE THE PICKUP ROLLER 154 ...
Страница 155: ...4 12 HOW TO REMOVE THE CASSETTE TRAY 155 ...
Страница 156: ...4 13 INSTALLATION POSITION OF THE LEAD WIRES 4 13 1 KX FM89BX 156 ...
Страница 157: ...4 13 2 KX FM89CX 157 ...
Страница 164: ...6 2 1 GENERAL BLOCK DIAGRAM CROSS REFERENCE ANALOG UNIT BLOCK DIAGRAM 6 3 CONTROL SECTION 6 3 1 BLOCK DIAGRAM 164 ...
Страница 165: ...6 3 2 MEMORY MAP 6 3 3 ASIC IC501 165 ...
Страница 167: ...167 ...
Страница 188: ...Note See Sensor Locations in SENSORS AND SWITCHES 6 4 6 3 2 TRANSMITTING DOCUMENTS 188 ...
Страница 189: ...CROSS REFERENCE SENSOR SECTION 6 4 6 3 3 RECEIVING FAX 189 ...
Страница 190: ...Note See Sensor Locations in SENSORS AND SWITCHES 6 4 6 3 4 COPYING 190 ...
Страница 216: ...9 CABINET MECHANICAL AND ELECTRICAL PARTS LOCATION 9 1 OPERATION PANEL SECTION 216 ...
Страница 217: ...9 2 UPPER CABINET SECTION 217 ...
Страница 218: ...9 2 1 BACK COVER SECTION 9 2 1 1 BACK COVER 1 218 ...
Страница 219: ...9 2 1 2 BACK COVER 2 219 ...
Страница 220: ...9 3 LOWER P C B SECTION 220 ...
Страница 221: ...CROSS REFERENCE OPERATION PANEL SECTION 9 4 MOTOR SECTION 221 ...
Страница 222: ...9 5 ACTUAL SIZE OF SCREWS AND WASHER 222 ...
Страница 223: ...10 ACCESSORIES AND PACKING MATERIALS 223 ...
Страница 263: ...PFUP1160Z PFUP1160Z C H 11 1 CN1 CN2 BOTTOM VIEW COMPONENT VIEW RS232C BOARD KX FM89BX KX FM89CX ...
Страница 264: ...RS232C BOARD SCHEMATIC DIAGRAM KX FM89BX KX FM89CX ...