3-21
Confidential
Ink near-empty/ink empty detection
The ink refill assembly has four ink empty sensors (photosensors of transparent type) that
monitor the ink levels with sensor actuators inside the ink cartridges.
Attached to one end of the sensor actuator is a float. When there is ink in the cartridge,
buoyancy lifts the float, rotating the sensor actuator about a pivot near the center of the actuator
to block the light beam to the ink empty sensor, indicating that there is ink.
As the ink level in the ink cartridge drops, however, the float falls, eventually moving the sensor
actuator out of the beam.
Light hitting the sensor outputs the "ink near-empty" signal to the controller that shows the "Ink
low" message and activates a firmware counter tracking ink usage during ink-jet printing,
purges, and other operations. When this counter reaches a predetermined limit, the firmware
regards it as "ink empty" and shows the "Cannot Print" message to prompts the user to replace
it.
Ink supply port
Air intake port
Air
Ink
(InkBackflowPrevention)
Disc valve S
Disc valve D
Sensor actuator
Ink empty
sensor
(InkEmptySensor_2)
Ink empty sensor
Sensor actuator
Float
Содержание MFC 5490CN - Color Inkjet - All-in-One
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Страница 14: ...Confidential CHAPTER 1 PARTS NAMES AND FUNCTIONS ...
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Страница 36: ...Confidential CHAPTER 3 THEORY OF OPERATION ...
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Страница 142: ...Confidential CHAPTER 5 HANDLING DATA HELD IN THE MACHINE PRIOR TO REPAIR ...
Страница 149: ...Confidential CHAPTER 6 DISASSEMBLY REASSEMBLY AND LUBRICATION ...
Страница 240: ...Confidential CHAPTER 7 ADJUSTMENTS AND UPDATING OF SETTINGS REQUIRED AFTER PARTS REPLACEMENT ...
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Страница 254: ...7 12 Confidential Head Positioning Test Pattern ...
Страница 258: ...7 16 Confidential Paper Feeding Check Pattern for the Paper Feed Roller ...
Страница 259: ...7 17 Confidential Paper Feeding Check Pattern for the Paper Ejection Roller ...
Страница 261: ...7 19 Confidential Vertical Alignment Check Patterns 2 2 ...
Страница 265: ...7 23 Confidential Left and Right Margin Check Pattern ...
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Страница 279: ...Confidential CHAPTER 8 CLEANING ...
Страница 283: ...Confidential CHAPTER 9 MAINTENANCE MODE ...
Страница 291: ...9 6 Confidential Scanning Compensation Data List ...
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Страница 299: ...9 14 Confidential Configuration List ...
Страница 314: ...9 29 Confidential Paper Feeding Check Pattern for the Paper Feed Roller ...
Страница 315: ...9 30 Confidential Paper Feeding Check Pattern for the Paper Ejection Roller ...
Страница 320: ...9 35 Confidential Vertical Alignment Check Patterns 1 2 ...
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Страница 325: ...9 40 Confidential Left and Right Margin Check Pattern ...
Страница 326: ...9 41 Confidential Bottom Margin Check Pattern ...
Страница 356: ...App 2 3 Confidential 8 Alert warning message of WHQL appears Click Continue Anyway to proceed ...
Страница 436: ...App 6 4 Confidential B Power supply PCB 100 V series ...
Страница 437: ...App 6 5 Confidential B Power supply PCB 200 V series ...