54
KX-MB2230JT/ KX-MB2270JT/ KX-MB2515JT/ KX-MB2545JT/ KX-MB2575JT/ DP-MB310JT
6.9.
FAN Motor Section
6.9.1.
General
This unit is equipped with two FAN motors to prevent the developing devices, Low Voltage Power Supply board (SMPS Board) and
other devices from overheating during printing.
The FAN rotates at high speed (Approx. 3000rpm) while printing.
After printing is finished, FAN rotates at low speed (Approx.2200rpm) while predetermined period.
6.9.2.
Circuit Diagram of FAN
Two FAN motors are controlled by following one circuit.
Depending on a model, the number of fans is one.
So the operation of two FAN motors (Full speed rotation/Half speed rotation/Stop) are controlled simultaneously.
6.9.3.
Fan Control
For the control of FAN speed, comparator IC (IC504) is used.
This IC compares (+) side input level and (-) side input level.
If (+) side input level is bigger than (-) side input level, output of this IC is "OPEN".
If (+) side input level is less than (-) side input level, it outputs "L" level.
6.9.3.1.
Half Speed Mode
In half speed mode, IC300_pin K25 outputs pulse (frequency is about 30KHz, duty is about 37.5%).
This pulse is integrated by R644 and C618 then Pin2_IC504 becomes approx. DC1.24V. Input level of IC504_pin2 is determined by
the voltage of between R624.
If voltage between R624 is less than 1.24V, output of pin1_IC504 becomes "H".
Then both Q606, Q607 and Q603 are turned on. So voltage between R624 (=the voltage of pin2_IC504) rises gradually.
When the voltage between R624 exceeds 1.24V, output of pin1_IC504 becomes "L".
Then both Q606, Q607 and Q603 are turned off. So voltage between R624 falls gradually.
By repeating these sequences, voltage between R624 is controlled approx. 1.24V.
On the other hand, if FAN voltage is represented Vo and voltage between R624 is represented VL, VL is determined as below for-
mula.
VL=Vo*R624/(R623+R624)
→
Vo=VL*(R623+R624)/R624
Since each value is as follows, Vo is determined approx. 9.7(V).
VL=1.24(V), R623=150(Kohm), R624=22(Kohm)
Vo=1.24*(150K+22K)/22K=9.7(V)
Therefore by reducing the voltage of FAN power supply, FAN rotates with half speed.
Содержание KX-MB2230JT
Страница 15: ...15 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT 4 2 2 General messages ...
Страница 16: ...16 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT 4 2 3 Interface messages ...
Страница 46: ...46 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT 3 W1 2 Phase excitation ...
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Страница 136: ...136 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT KX MB2270 ...
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Страница 138: ...138 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT KX MB2575 ...
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Страница 144: ...144 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT KX MB2515 ...
Страница 145: ...145 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT ...
Страница 146: ...146 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT KX MB2545 ...
Страница 147: ...147 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT ...
Страница 148: ...148 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT Note The above values are the default values ...
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Страница 153: ...153 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT KX MB2270 ...
Страница 154: ...154 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT KX MB2575 ...
Страница 155: ...155 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT DP MB310JT ...
Страница 156: ...156 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT KX MB2515 ...
Страница 194: ...194 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT 12 3 7 3 Skew ...
Страница 196: ...196 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT 12 3 7 5 The Recording Paper Jam ...
Страница 200: ...200 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT 12 3 8 2 Skew ADF ...
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Страница 215: ...215 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT CROSS REFERENCE Test Functions P 124 ...
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Страница 230: ...230 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT 15 Toner Detection Flow ...
Страница 233: ...233 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT 12 3 15 Motor Section 12 3 15 1 Main Motor ...
Страница 234: ...234 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT 12 3 15 2 FB Motor ...
Страница 235: ...235 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT 12 3 15 3 ADF MOTOR ...
Страница 237: ...237 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT 12 3 17 CIS Control Section ...
Страница 240: ...240 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT 12 3 19 High Voltage Section 1 Main ...
Страница 241: ...241 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT 2 CHG GRID ...
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Страница 243: ...243 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT 3 DEV DC ...
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Страница 246: ...246 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT 2 Confirmation of the main unit ...
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Страница 249: ...249 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT Waveform of normal operation ...
Страница 250: ...250 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT 12 3 21 LAN Section LAN Block Diagram ...
Страница 256: ...256 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT 12 3 23 2 Troubleshooting Flow Chart ...
Страница 262: ...262 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT 3 Remove the drum cartridge 1 ...
Страница 271: ...271 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT 14 2 Flow Chart for Disassembly ...
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Страница 277: ...277 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT 14 3 7 Remove the Speaker ...
Страница 279: ...279 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT 14 3 9 Remove the Right Cover ...
Страница 280: ...280 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT 14 3 10 Remove the Drive Unit ...
Страница 283: ...283 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT 14 3 15 Remove the FAN ...
Страница 284: ...284 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT 14 3 16 Remove the FB Unit ...
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Страница 289: ...289 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT 14 3 20 Disassemble the FB Unit FB Motor ...
Страница 291: ...291 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT 14 3 23 Remove the Top Cover ...
Страница 292: ...292 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT 14 3 24 Remove the Main Chassis ...
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Страница 310: ...310 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT 3 Close the document cover 1 ...
Страница 325: ...325 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT 15 6 1 NG Example ...
Страница 326: ...326 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT 15 7 Test Chart 15 7 1 ITU T No 1 Test Chart ...
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