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Then the power is supplied to the Load. When Q
1
is ON, power is not output from the secondary
side. The output voltage is fed back in the control IC according to the error amp rectifier. Then
depending on how T
ON
is controlled, stabilization occurs. Also, when the current load becomes
too large, in order to decrease the voltage output, the increase in
is controlled and the
output voltage is stabilized.
Therefore, basically the timing: Ton/Toff of Q1 controls the output voltage.
[Surge Absorber Circuit]
This circuit is for absorbing surge voltage generated by the transformer.
[Control Circuit and Detecting Circuit]
The control circuit amplifies the output with increased voltage detected in the error detecting
circuit. Then it drives the main transistor.
In this power supply, the duty ratio is defined by changing the ON period of the main transistor.
This is shown as follows.
When the output voltage of the 24V circuit increases, the current of the photo coupler PC101
increases, the pulse width of the output control IC becomes narrower and the ON period of
Q101 becomes shorter.
[Over Current Limiter (O.C.L)]
The highest drain current (Q101) is limited by a limiter circuit (IC101) of 24V. The 24V output is
214
Summary of Contents for KX-FM89BX
Page 11: ...1 11 2 ITU T No 2 TEST CHART 11 ...
Page 12: ...1 12 LOCATION OF CONTROLS 1 12 1 OVERVIEW 12 ...
Page 49: ...Fig B 49 ...
Page 57: ...Fig C 2 3 4 12 A BLANK PAGE IS RECEIVED 57 ...
Page 73: ...73 ...
Page 74: ...CROSS REFERENCE TEST FUNCTIONS 74 ...
Page 75: ...CROSS REFERENCE TEST FUNCTIONS 75 ...
Page 76: ...CROSS REFERENCE TEST FUNCTIONS 76 ...
Page 77: ...CROSS REFERENCE TEST FUNCTIONS 77 ...
Page 78: ...78 ...
Page 79: ...79 ...
Page 80: ...80 ...
Page 94: ...2 3 6 4 CHECK THE STATUS OF THE DIGITAL BOARD 94 ...
Page 96: ...96 ...
Page 99: ...Note Inside the digital board Inside the operation board 2 3 8 1 2 FOR KX FM89CX 99 ...
Page 101: ...investigation 2 No pulse dialing 3 No ring tone or No bell 101 ...
Page 105: ...2 3 10 2 TOROUBLESHOOTING FLOW CHART 105 ...
Page 106: ...106 ...
Page 107: ...107 ...
Page 111: ...CROSS REFERENCE TEST FUNCTIONS 111 ...
Page 112: ...2 3 14 THERMAL HEAD SECTION Refer to THERMAL HEAD 112 ...
Page 123: ...Note The above values are the default values 2 5 4 SERVICE FUNCTION TABLE 123 ...
Page 139: ...2 Left margin Top margin Reference pattern 139 ...
Page 140: ...3 Thermal head 1 dot Reference pattern 140 ...
Page 145: ...4 3 HOW TO REMOVE THE OPERATION PANEL BLOCK 145 ...
Page 146: ...4 4 HOW TO REMOVE THE OPERATION BOARD AND LCD 146 ...
Page 147: ...4 5 HOW TO REMOVE THE ANALOG DIGITAL AND POWER BOARDS AND AC INLET 147 ...
Page 148: ...4 6 HOW TO REMOVE THE MOTOR BLOCK 148 ...
Page 149: ...149 ...
Page 150: ...4 7 HOW TO REMOVE THE SEPARATION ROLLER 150 ...
Page 151: ...4 8 HOW TO REMOVE THE IMAGE SENSOR CIS 151 ...
Page 152: ...4 9 HOW TO REMOVE THE TERMAL HEAD 152 ...
Page 153: ...4 10 HOW TO REMOVE THE PLATEN ROLLER BACK COVER 153 ...
Page 154: ...4 11 HOW TO REMOVE THE PICKUP ROLLER 154 ...
Page 155: ...4 12 HOW TO REMOVE THE CASSETTE TRAY 155 ...
Page 156: ...4 13 INSTALLATION POSITION OF THE LEAD WIRES 4 13 1 KX FM89BX 156 ...
Page 157: ...4 13 2 KX FM89CX 157 ...
Page 165: ...6 3 2 MEMORY MAP 6 3 3 ASIC IC501 165 ...
Page 167: ...167 ...
Page 188: ...Note See Sensor Locations in SENSORS AND SWITCHES 6 4 6 3 2 TRANSMITTING DOCUMENTS 188 ...
Page 189: ...CROSS REFERENCE SENSOR SECTION 6 4 6 3 3 RECEIVING FAX 189 ...
Page 190: ...Note See Sensor Locations in SENSORS AND SWITCHES 6 4 6 3 4 COPYING 190 ...
Page 216: ...9 CABINET MECHANICAL AND ELECTRICAL PARTS LOCATION 9 1 OPERATION PANEL SECTION 216 ...
Page 217: ...9 2 UPPER CABINET SECTION 217 ...
Page 218: ...9 2 1 BACK COVER SECTION 9 2 1 1 BACK COVER 1 218 ...
Page 219: ...9 2 1 2 BACK COVER 2 219 ...
Page 220: ...9 3 LOWER P C B SECTION 220 ...
Page 221: ...CROSS REFERENCE OPERATION PANEL SECTION 9 4 MOTOR SECTION 221 ...
Page 222: ...9 5 ACTUAL SIZE OF SCREWS AND WASHER 222 ...
Page 223: ...10 ACCESSORIES AND PACKING MATERIALS 223 ...
Page 264: ...RS232C BOARD SCHEMATIC DIAGRAM KX FM89BX KX FM89CX ...