3-42
Confidential
• The carriage motor (CR) encoder sensor monitors the current position and speed of the head/
carriage unit. If the controller detects a head's travel speed error, it interprets the error state as
a paper jam or any foreign material getting into the carriage travel path and stops the
operation.
• The paper feed motor (PF) encoder sensor monitors the PF roller rotation angle and speed for
use in optimizing paper feed amount and speed.
• The Auto Sheet Feeder motor (ASF) encoder sensor monitors the rotation angle and speed of
the ASF motor shaft for use in optimizing paper pull-in amount and speed.
• The purge cam switch detects the drive positions of the purge cam.
• The cap lift cam switch detects the drive positions of the cap lift cam.
• The casing internal temperature thermistor monitors the temperature inside the machine. With
this thermistor signal, the controller determines the periodical automatic purge interval since
the casing internal temperature is almost equal to the ambient temperature of ink inside the
ink cartridges.
• There are four ink empty sensors, one for each color. The sensor actuator inside the ink
cartridge usually blocks the light path to indicate the presence of ink. When ink runs low
(near-empty state), the arm moves out of the beam, activating the sensor. The "Ink low"
message appears.
• There are four ink cartridge detection sensors, one for each color. The sensor detects whether
an ink cartridge is loaded.
The ON timing of the ink cartridge detection sensor and ink empty sensor enables the
controller to discriminate between a standard and high-yield ink cartridges.
Most sensors are photointerrupters consisting of a light-emitting diode and a light-sensitive
transistor as shown below. The only exception is the paper width sensor, which uses reflective
type. The illustration on the next page gives the sensor and actuator locations.
The scanner cover sensor and the ink cartridge cover sensor use a carbon switch that consists of
a carbon on the rubber keypad and a carbon contact printed on the control panel PCB. Opening
the scanner cover or the ink cartridge cover releases the corresponding sensor actuator so that
the actuator is pressed against the rubber keypad by the spring force. Accordingly, the carbon
on the rubber keypad comes into contact with the carbon contact on the control panel PCB. The
conduction results in a voltage level change of the IC port, signaling the cover open.
Actuator's end
Light-sensitive
transistor
Light-emitting
diode
Содержание MFC 5890CN - Color Inkjet - All-in-One
Страница 8: ...vi Confidential ...
Страница 9: ...vii Confidential ...
Страница 10: ...viii Confidential ...
Страница 11: ...ix Confidential ...
Страница 12: ...x Confidential ...
Страница 13: ...xi Confidential ...
Страница 14: ...xii Confidential ...
Страница 15: ...xiii Confidential ...
Страница 16: ...Confidential CHAPTER 1 PARTS NAMES AND FUNCTIONS ...
Страница 20: ...1 3 Confidential 1 2 CONTROL PANEL 10 9 7 8 6 1 2 3 4 5 ...
Страница 21: ...1 4 Confidential ...
Страница 22: ...1 5 Confidential ...
Страница 24: ...Confidential CHAPTER 2 SPECIFICATIONS ...
Страница 48: ...2 22 Confidential ITU T Test Chart 1 ...
Страница 49: ...2 23 Confidential Brother Chart ...
Страница 50: ...Confidential CHAPTER 3 THEORY OF OPERATION ...
Страница 96: ...Confidential CHAPTER 4 ERROR INDICATION AND TROUBLESHOOTING ...
Страница 100: ...4 2 Confidential 1 Error messages appearing on the LCD ...
Страница 101: ...4 3 Confidential ...
Страница 102: ...4 4 Confidential Check that you have subscribed to the Caller ID service ...
Страница 103: ...4 5 Confidential ...
Страница 104: ...4 6 Confidential ...
Страница 150: ...Confidential CHAPTER 5 HANDLING DATA HELD IN THE MACHINE PRIOR TO REPAIR ...
Страница 154: ...Confidential CHAPTER 6 DISASSEMBLY REASSEMBLY AND LUBRICATION ...
Страница 245: ...Confidential CHAPTER 7 ADJUSTMENTS AND UPDATING OF SETTINGS REQUIRED AFTER PARTS REPLACEMENT ...
Страница 252: ...7 5 Confidential 8 Alert warning message of WHQL appears Click Continue Anyway to proceed ...
Страница 260: ...7 13 Confidential Head Positioning Test Pattern ...
Страница 264: ...7 17 Confidential Paper Feeding Check Pattern for the Paper Feed Roller ...
Страница 265: ...7 18 Confidential Paper Feeding Check Pattern for the Paper Ejection Roller ...
Страница 267: ...7 20 Confidential Vertical Alignment Check Patterns 2 2 ...
Страница 271: ...7 24 Confidential Left and Right Margin Check Pattern ...
Страница 272: ...7 25 Confidential Bottom Margin Check Pattern ...
Страница 282: ...7 35 Confidential ADF Copy Chart A B C D ...
Страница 286: ...Confidential CHAPTER 8 CLEANING ...
Страница 290: ...Confidential CHAPTER 9 MAINTENANCE MODE ...
Страница 298: ...9 6 Confidential Scanning Compensation Data List ...
Страница 301: ...9 9 Confidential Test Pattern ...
Страница 306: ...9 14 Confidential Configuration List ...
Страница 322: ...9 30 Confidential Paper Feeding Check Pattern for the Paper Feed Roller ...
Страница 323: ...9 31 Confidential Paper Feeding Check Pattern for the Paper Ejection Roller ...
Страница 328: ...9 36 Confidential Vertical Alignment Check Patterns 1 2 ...
Страница 329: ...9 37 Confidential Vertical Alignment Check Patterns 2 2 ...
Страница 333: ...9 41 Confidential Left and Right Margin Check Pattern ...
Страница 334: ...9 42 Confidential Bottom Margin Check Pattern ...
Страница 364: ...App 2 3 Confidential 8 Alert warning message of WHQL appears Click Continue Anyway to proceed ...
Страница 445: ...App 6 4 Confidential B Power supply PCB 100 V series ...
Страница 446: ...App 6 5 Confidential B Power supply PCB 200 V series ...