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54
KX-MB2061CXB/KX-MB2061CX2/KX-MB2062CXB
6.11. FAN Motor Section
6.11.1. General
This unit is equipped with two FAN motors to prevent the developing devices, Power Supply Unit (PSU) 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.
6.11.2. Circuit Diagram of FAN
Two FAN motors are controlled by following one circuit.
So the operation of two FAN motors (Full speed rotation/Half speed rotation/Stop) are controlled simultaneously.
6.11.3. 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.
6.11.3.1. Half Speed Mode
In half speed mode, IC300_pinA11 outputs pulse (frequency is about 30KHz, duty is about 37.5%).
This pulse is integrated by R30 and C502 then Pin2_IC504 becomes approx. DC1.24V. Input level of IC504_pin2 is determined by
the voltage of between R507.
If voltage between R507 is less than 1.24V, output of pin1_IC504 becomes "H".
Then both Q512 and Q510 are turned on. So voltage between R504 (=the voltage of pin2_IC504) rises gradually.
When the voltage between R507 exceeds 1.24V, output of pin1_IC504 becomes "L".
Then both Q512 and Q510 are turned off. So voltage between R507 falls gradually.
By repeating these sequences, voltage between R507 is controlled approx. 1.24V.
On the other hand, if FAN voltage is represented Vo and voltage between R507 is represented VL, VL is determined as below for-
mula.
VL=Vo*R507/(R505+R507)
→
Vo=VL*(R505+R507)/R507
Since each value is as follows, Vo is determined approx. 9.7(V).
VL=1.24(V), R505=150(Kohm), R507=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.
6.11.3.2. Full Speed Mode
In full speed mode, IC300_pinA11 outputs constant 3.3V.
When both Q512 and Q510 are turned on, Vo becomes 24V.
So the voltage between R507 is determined as follows
VL=Vo*R507/(R505+R507)=24*22K/(150K+22K)=3.07(V)
Since IC504_pinA3 is 3.3V and IC504_pinA2 is 3.07V, pin1_IC504 is always "H".
Consequently both Q512 and Q510 are always turned on, and then 24V is supplied to FAN motors.
Therefore FAN rotates with full speed.
Summary of Contents for KX-MB2061CXB
Page 32: ...32 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 6 4 1 4 Analog Block Diagram ...
Page 57: ...57 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 6 13 LSU Laser Scanning Unit Section ...
Page 58: ...58 KX MB2061CXB KX MB2061CX2 KX MB2062CXB ...
Page 67: ...67 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 6 14 10 2 Drum Detection ...
Page 74: ...74 KX MB2061CXB KX MB2061CX2 KX MB2062CXB ...
Page 79: ...79 KX MB2061CXB KX MB2061CX2 KX MB2062CXB Power Supply ...
Page 80: ...80 KX MB2061CXB KX MB2061CX2 KX MB2062CXB wave form ...
Page 82: ...82 KX MB2061CXB KX MB2061CX2 KX MB2062CXB Power Supply wave form ...
Page 90: ...90 KX MB2061CXB KX MB2061CX2 KX MB2062CXB ...
Page 114: ...114 KX MB2061CXB KX MB2061CX2 KX MB2062CXB ...
Page 126: ...126 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 11 2 Cordless Handset ...
Page 129: ...129 KX MB2061CXB KX MB2061CX2 KX MB2062CXB Note The above values are the default values ...
Page 163: ...163 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 12 3 8 2 The Recording Paper Is Waved or Wrinkled ...
Page 164: ...164 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 12 3 8 3 Skew ...
Page 166: ...166 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 12 3 8 5 The Recording Paper Jam ...
Page 169: ...169 KX MB2061CXB KX MB2061CX2 KX MB2062CXB CROSS REFERENCE Motor Section P 206 ...
Page 170: ...170 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 12 3 9 2 Skew ADF ...
Page 172: ...172 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 12 3 9 6 Black or White Vertical Line Is Copied ...
Page 182: ...182 KX MB2061CXB KX MB2061CX2 KX MB2062CXB ...
Page 184: ...184 KX MB2061CXB KX MB2061CX2 KX MB2062CXB ...
Page 185: ...185 KX MB2061CXB KX MB2061CX2 KX MB2062CXB CROSS REFERENCE Test Functions P 119 ...
Page 186: ...186 KX MB2061CXB KX MB2061CX2 KX MB2062CXB CROSS REFERENCE Test Functions P 119 ...
Page 187: ...187 KX MB2061CXB KX MB2061CX2 KX MB2062CXB CROSS REFERENCE Test Functions P 119 ...
Page 188: ...188 KX MB2061CXB KX MB2061CX2 KX MB2062CXB CROSS REFERENCE Test Functions P 119 ...
Page 189: ...189 KX MB2061CXB KX MB2061CX2 KX MB2062CXB ...
Page 190: ...190 KX MB2061CXB KX MB2061CX2 KX MB2062CXB ...
Page 191: ...191 KX MB2061CXB KX MB2061CX2 KX MB2062CXB CROSS REFERENCE Test Functions P 119 ...
Page 206: ...206 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 12 3 19 Motor Section 12 3 19 1 Engine Motor ...
Page 207: ...207 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 12 3 19 2 FB Flatbed Motor ...
Page 208: ...208 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 12 3 19 3 ADF Motor ...
Page 210: ...210 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 12 3 21 CIS Control Section ...
Page 211: ...211 KX MB2061CXB KX MB2061CX2 KX MB2062CXB CROSS REFERENCE Test Functions P 119 ...
Page 213: ...213 KX MB2061CXB KX MB2061CX2 KX MB2062CXB ...
Page 214: ...214 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 12 3 23 High Voltage Section 1 Main ...
Page 215: ...215 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 2 CHG GRID ...
Page 216: ...216 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 3 TRA ...
Page 217: ...217 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 3 DEV DC ...
Page 218: ...218 KX MB2061CXB KX MB2061CX2 KX MB2062CXB TRA ...
Page 220: ...220 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 2 Confirmation of the main unit ...
Page 222: ...222 KX MB2061CXB KX MB2061CX2 KX MB2062CXB Waveform of normal operation ...
Page 224: ...224 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 2 When 100Base TX enabled device is connected ...
Page 225: ...225 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 3 When 10Base T enabled device is connected ...
Page 229: ...229 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 3 3V 1 2V Troubleshooting Guide 2 ...
Page 230: ...230 KX MB2061CXB KX MB2061CX2 KX MB2062CXB ...
Page 231: ...231 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 4V Troubleshooting Guide ...
Page 232: ...232 KX MB2061CXB KX MB2061CX2 KX MB2062CXB ...
Page 234: ...234 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 12 3 27 2 Troubleshooting Flow Chart ...
Page 246: ...246 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 13 Service Fixture Tools ...
Page 248: ...248 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 14 1 Bottom Section 14 2 Left Side Section ...
Page 251: ...251 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 14 8 Remove Main Board ...
Page 252: ...252 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 14 9 Remove Gear Chassis Section ...
Page 253: ...253 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 14 10 Remove Right Cover ...
Page 254: ...254 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 14 11 Remove Cassette Guides and Antenna ...
Page 255: ...255 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 14 12 Remove Bottom Plate 14 13 Remove Laser Unit ...
Page 256: ...256 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 14 14 Remove Pick up Roller ...
Page 258: ...258 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 14 17 Remove High Voltage Power Board ...
Page 260: ...260 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 14 18 1 1 How to Replace the LCD ...
Page 261: ...261 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 14 19 How to Remove the Charger Board ...
Page 263: ...263 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 14 20 2 Top Cover Section 2 ...
Page 264: ...264 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 14 20 3 Top Cover Section 3 ...
Page 265: ...265 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 14 20 4 Bottom Part Section 1 ...
Page 266: ...266 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 14 20 5 Bottom Part Section 2 ...
Page 267: ...267 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 14 20 6 Side Cabinet Section 1 ...
Page 268: ...268 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 14 20 7 Side Cabinet Section 2 ...
Page 269: ...269 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 14 20 8 Side Cabinet Section 3 ...
Page 300: ...300 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 16 7 1 NG Example ...
Page 301: ...301 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 16 8 Test Chart 16 8 1 ITU T No 1 Test Chart ...
Page 302: ...302 KX MB2061CXB KX MB2061CX2 KX MB2062CXB 16 8 2 ITU T No 2 Test Chart ...
Page 307: ...307 KX MB2061CXB KX MB2061CX2 KX MB2062CXB Memo ...
Page 336: ...336 KX MB2061CXB KX MB2061CX2 KX MB2062CXB Memo ...
Page 379: ...379 KX MB2061CXB KX MB2061CX2 KX MB2062CXB ...
Page 380: ...380 KX MB2061CXB KX MB2061CX2 KX MB2062CXB YK KXMB2061CXB KXMB2061CX2 KXMB2062CXB ...