Trailing edge sensor
Detects the media’s trailing edge as it passes the pick tires. Among other capabilities, this sensor can be used
to determine the paper size sensor and the media stack height.
MPF sensor
Detects the presence of media in the MPF tray.
Media present sensor
Detects the presence of media in the tray.
Tray present sensor
Detects the presence of the tray in the printer.
Bin full sensor
Detects whether the standard bin is full by moving the actuator up and down.
Toner density sensor
Detects a pre-placed toner patch and image on the photoconductor (drum) and outputs pulses when the central
line of the patch image aligns with the central line of the detector. The sensor outputs pulses at the timing the
patch image passes the sensor. Therefore, observing changes of intervals at which pulses are output leads to
toner density detection.
Pass through sensor (option tray)
Detects when the media from the option tray passes. This will trigger the pick roller to pick the next media.
Capactive Toner Level Sensor (CTLS)
Detects the amount of toner in the imaging unit. If the toner level is low, the cartridge auger motor is triggered
to add toner from the toner cartridge to the imaging unit.
Front door sensor
Is a safety switch that cuts off a 5 V DC supply from the controller board to the LSU to prevent the laser from
activating when the front door is opened.
Other key components
Cooling fan
Discharges air from the printer to prevent excessive temperature increase.
Power supply
The power supply has two main sections: the HVPS and LVPS. The HVPS card assembly generates AC power
and feeds it to the developer roll, the transfer roll assembly and the charge roll assembly. The LVPS card
assembly generates low voltages: 5 V DC for logic circuits, 5 V DC for laser diodes and 24 V DC for cooling
fans.
4514-6xx
Theory of operation
370
Summary of Contents for M3150
Page 12: ...Part name index 393 4514 6xx Table of contents 12 ...
Page 20: ...4514 6xx 20 ...
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Page 246: ...3 Remove two screws A and then remove the cooling fan mount A 4514 6xx Parts removal 246 ...
Page 256: ...5 Remove the four screws B and then remove the right front mount B 4514 6xx Parts removal 256 ...
Page 260: ...b Set the spring over the plunger 4514 6xx Parts removal 260 ...
Page 277: ...3 Squeeze the latches B to release the left and right links B 4514 6xx Parts removal 277 ...
Page 300: ...3 Place the printer on its rear side 4 Release the sensor flag A 4514 6xx Parts removal 300 ...
Page 301: ...5 Remove the screw B 6 Remove the sensor flag bracket C 4514 6xx Parts removal 301 ...
Page 323: ...3 Swing the right cover backward to remove 4 Remove the screw D 4514 6xx Parts removal 323 ...
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Page 335: ...Assembly 1 Covers 4514 6xx Parts catalog 335 ...
Page 338: ...4514 6xx Parts catalog 338 ...
Page 339: ...Assembly 2 Electronics 1 1 2 3 4 5 7 9 10 11 6 8 12 4514 6xx Parts catalog 339 ...
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Page 343: ...Assembly 3 Electronics 2 4 3 2 1 5 6 8 9 7 4514 6xx Parts catalog 343 ...
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Page 346: ...Assembly 4 Frame 10 11 12 13 14 9 1 5 6 7 8 4 4 2 3 4514 6xx Parts catalog 346 ...
Page 349: ...Assembly 5 Option trays 3 4 5 6 1 2 4514 6xx Parts catalog 349 ...
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Page 386: ...4514 6xx Index 386 ...
Page 392: ...4514 6xx Part number index 392 ...
Page 398: ...4514 6xx Part name index 398 ...