59
KX-MB2085CXW/KX-MB2090CXW
6.16. Heat Lamp Control Circuit
The temperature of the fixing part of the Fuser Unit is converted to a Voltage by THERMISTOR and input to IC300_pinC21.
The heat lamp is turned on/off by the HTRCTL signal (IC300_pinAE22) through the photo triac (PC7001) and the triac (Q7002).
Two thermostats are provided on the AC line as the safety protection devices.
Overheat protection circuit is provided so as to prevent the Fuser unit from overheating when CPU cannot control Fuser by any
problem.
IC504 compares Thermistor voltage (THRMSTR0) and predetermined voltage, which is determined by 3.3V, R581 and R584.
If Therm0 voltage becomes lower than this predetermined voltage (this voltage corresponds to about 240°C), output of
IC504_pin7 becomes "H", then Q530 turns ON.
Once Q530 turns on, IC507_pin7 keeps "H" even after the THRMSTR0 voltage becomes bigger than the voltage of IC504_pin5.
And when IC507_pin7 keeps "H", both Q500 and Q527 turn off.
As the result, once Fuser temperature exceeds 240°C (this temperature is abnormal condition), no current is supplied to Fuser lamp.
1.
Heater control sequence at printing mode
a. After receiving printing data, heater turns on.
b. When heater temperature reaches to the Primary Stable Temperature (170
°
C).
c. When heater temperature reaches to the Secondary Stable Temperature (170
°
C/200
°
C), paper feed starts.
Содержание KX-MB2085CXW
Страница 38: ...38 KX MB2085CXW KX MB2090CXW 6 8 2 Flat torque 1 2 phase excitation half step 1 Timing chart 2 Wave form ...
Страница 39: ...39 KX MB2085CXW KX MB2090CXW 6 8 3 W1 2 phase excitation Quarter step 1 Timing chart 2 Wave form ...
Страница 44: ...44 KX MB2085CXW KX MB2090CXW 6 11 LSU Laser Scanning Unit Section ...
Страница 45: ...45 KX MB2085CXW KX MB2090CXW ...
Страница 53: ...53 KX MB2085CXW KX MB2090CXW 6 12 9 2 Drum Detection ...
Страница 60: ...60 KX MB2085CXW KX MB2090CXW ...
Страница 79: ...79 KX MB2085CXW KX MB2090CXW Note The above values are the default values Code Set Value Code Set Value ...
Страница 80: ...80 KX MB2085CXW KX MB2090CXW KX MB2090 ...
Страница 81: ...81 KX MB2085CXW KX MB2090CXW Note The above values are the default values ...
Страница 109: ...109 KX MB2085CXW KX MB2090CXW 12 3 7 3 Dark or White Horizontal Line CROSS REFERENCE High Voltage Section P 152 ...
Страница 110: ...110 KX MB2085CXW KX MB2090CXW 12 3 7 4 Dirty or Half Darkness Background CROSS REFERENCE High Voltage Section P 152 ...
Страница 112: ...112 KX MB2085CXW KX MB2090CXW 12 3 7 6 Light Print CROSS REFERENCE High Voltage Section P 152 ...
Страница 113: ...113 KX MB2085CXW KX MB2090CXW 12 3 7 7 Black or White Point 12 3 8 Recording Paper Feed 12 3 8 1 Multiple Feed ...
Страница 114: ...114 KX MB2085CXW KX MB2090CXW 12 3 8 2 The Recording Paper Is Waved or Wrinkled ...
Страница 115: ...115 KX MB2085CXW KX MB2090CXW 12 3 8 3 Skew ...
Страница 117: ...117 KX MB2085CXW KX MB2090CXW 12 3 8 5 The Recording Paper Jam ...
Страница 121: ...121 KX MB2085CXW KX MB2090CXW 12 3 10 ADF Auto Document Feeder Section 12 3 10 1 Black or White Vertical Line Is Copied ...
Страница 122: ...122 KX MB2085CXW KX MB2090CXW 12 3 10 2 An Abnormal Image Is Copied CROSS REFERENCE CIS Control Section P 148 ...
Страница 126: ...126 KX MB2085CXW KX MB2090CXW ...
Страница 128: ...128 KX MB2085CXW KX MB2090CXW ...
Страница 129: ...129 KX MB2085CXW KX MB2090CXW CROSS REFERENCE Test Functions P 70 ...
Страница 130: ...130 KX MB2085CXW KX MB2090CXW CROSS REFERENCE Test Functions P 70 ...
Страница 131: ...131 KX MB2085CXW KX MB2090CXW CROSS REFERENCE Test Functions P 70 ...
Страница 132: ...132 KX MB2085CXW KX MB2090CXW CROSS REFERENCE Test Functions P 70 ...
Страница 133: ...133 KX MB2085CXW KX MB2090CXW ...
Страница 134: ...134 KX MB2085CXW KX MB2090CXW ...
Страница 135: ...135 KX MB2085CXW KX MB2090CXW CROSS REFERENCE Test Functions P 70 ...
Страница 144: ...144 KX MB2085CXW KX MB2090CXW 12 3 15 Motor Section 12 3 15 1 Engine Motor ...
Страница 147: ...147 KX MB2085CXW KX MB2090CXW 12 3 16 LSU Section CROSS REFERENCE LSU Laser Scanning Unit Section P 44 ...
Страница 148: ...148 KX MB2085CXW KX MB2090CXW 12 3 17 CIS Control Section ...
Страница 149: ...149 KX MB2085CXW KX MB2090CXW CROSS REFERENCE Test Functions P 70 ...
Страница 151: ...151 KX MB2085CXW KX MB2090CXW ...
Страница 152: ...152 KX MB2085CXW KX MB2090CXW 12 3 19 High Voltage Section 1 Main ...
Страница 153: ...153 KX MB2085CXW KX MB2090CXW 2 CHG GRID ...
Страница 154: ...154 KX MB2085CXW KX MB2090CXW 3 TRA ...
Страница 155: ...155 KX MB2085CXW KX MB2090CXW 3 DEV DC ...
Страница 156: ...156 KX MB2085CXW KX MB2090CXW TRA ...
Страница 157: ...157 KX MB2085CXW KX MB2090CXW 12 3 20 USB Section Troubleshooting 1 Confirmation of the PC settings ...
Страница 158: ...158 KX MB2085CXW KX MB2090CXW 2 Confirmation of the main unit ...
Страница 160: ...160 KX MB2085CXW KX MB2090CXW Waveform of normal operation ...
Страница 162: ...162 KX MB2085CXW KX MB2090CXW 2 When 100Base TX enabled deviced is connected ...
Страница 163: ...163 KX MB2085CXW KX MB2090CXW 3 When 10Base T enabled device is connected ...
Страница 166: ...166 KX MB2085CXW KX MB2090CXW 12 3 22 Main Board Section Main Unit Power Supply Troubleshooting Guide ...
Страница 168: ...168 KX MB2085CXW KX MB2090CXW 12 3 23 2 Troubleshooting Flow Chart ...
Страница 171: ...171 KX MB2085CXW KX MB2090CXW 13 Service Fixture Tools ...
Страница 173: ...173 KX MB2085CXW KX MB2090CXW 14 1 Bottom Section 14 2 Left Side Section ...
Страница 174: ...174 KX MB2085CXW KX MB2090CXW 14 3 Operation Panel Section 14 4 Open Top Cover ...
Страница 175: ...175 KX MB2085CXW KX MB2090CXW 14 5 Remove Operation Panel 14 6 Remove Operation Board ...
Страница 176: ...176 KX MB2085CXW KX MB2090CXW 14 7 Remove Main Board ...
Страница 177: ...177 KX MB2085CXW KX MB2090CXW 14 8 Remove Gear Chassis Section ...
Страница 178: ...178 KX MB2085CXW KX MB2090CXW 14 9 Remove Right Cover 14 10 Remove Right Cassette Guide ...
Страница 179: ...179 KX MB2085CXW KX MB2090CXW 14 11 Remove Bottom Plate 14 12 Remove Laser Unit ...
Страница 180: ...180 KX MB2085CXW KX MB2090CXW 14 13 Remove Pick up Roller ...
Страница 181: ...181 KX MB2085CXW KX MB2090CXW 14 14 Remove Low Voltage Power Board 14 15 Remove Mirror ...
Страница 195: ...195 KX MB2085CXW KX MB2090CXW 15 4 Terminal Guide of The ICs Transistors and Diodes 15 4 1 Main Board ...
Страница 200: ...200 KX MB2085CXW KX MB2090CXW 15 6 1 NG Example ...
Страница 201: ...201 KX MB2085CXW KX MB2090CXW 15 7 Test Chart 15 7 1 ITU T No 1 Test Chart ...
Страница 202: ...202 KX MB2085CXW KX MB2090CXW 15 7 2 ITU T No 2 Test Chart ...
Страница 229: ...229 KX MB2085CXW KX MB2090CXW 18 1 3 ADF Gear Section 119 118 113 117 116 114 115 112 110 111 A J F ...
Страница 257: ...Information The extract from an Operating Instructions ...