3-19
Confidential
Ink cartridge components and their main roles
- Disc valve S
A plastic needle in the refill base opens this valve to supply air to the ink cartridge. Removing
the ink cartridge closes this valve to prevent leakage due to ink backflow.
- Disc valve D
A plastic needle in the refill base opens this valve to allow ink to flow out of the ink cartridge.
Removing the ink cartridge closes this valve to prevent leakage.
- Sensor actuator
This actuator indicates the amount of ink remaining. Certain positions cut the light beam to the
ink cartridge sensor on the ink cartridge PCB inside the ink refill assembly.
Ink near empty
Sensor actuator
Ink cartridge sensor
Filled with ink
No ink cartridge loaded
(InkCartridgeSensor)
These ink cartridges are single-use affairs. There is no provision for refilling them. The design
reduces environment load by using no metals and only burnable materials yielding no toxic
substances.
Ink near-empty detection
The ink refill assembly has four ink cartridge 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 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 is the signal that ink is running low ("Ink near-empty"), activating a
firmware counter tracking ink usage during ink-jet printing, purges, and other operations. When
this counter reaches a predetermined limit, the firmware considers the "ink empty" and prompts the
user to replace it.
Summary of Contents for DCP 330C - Color Inkjet - All-in-One
Page 1: ...Confidential MULTIFUNCTION EQUIPMENT SERVICE MANUAL MODELS DCP750CW DCP540CN DCP330C DCP130C ...
Page 9: ...vii Confidential Legal limitations for copying ...
Page 10: ...Confidential CHAPTER 1 PARTS NAMES AND FUNCTIONS ...
Page 16: ...1 5 Confidential 1 2 CONTROL PANEL Models with color LCD 1 2 3 4 5 10 9 8 7 6 Color Black ...
Page 17: ...1 6 Confidential Ink ...
Page 18: ...1 7 Confidential Models with monochrome LCD 1 2 3 4 5 10 9 8 7 6 ...
Page 19: ...1 8 Confidential ...
Page 21: ...Confidential CHAPTER 2 SPECIFICATIONS ...
Page 39: ...Confidential CHAPTER 3 THEORY OF OPERATION ...
Page 88: ...Confidential CHAPTER 4 ERROR INDICATION AND TROUBLESHOOTING ...
Page 131: ...Confidential CHAPTER 6 DISASSEMBLY REASSEMBLY AND LUBRICATION ...
Page 209: ...Confidential CHAPTER 7 ADJUSTMENTS AND UPDATING OF SETTINGS REQUIRED AFTER PARTS REPLACEMENT ...
Page 222: ...7 11 Confidential Head Positioning Test Pattern ...
Page 226: ...7 15 Confidential Paper Feeding Check Pattern for the Paper Feed Roller ...
Page 227: ...7 16 Confidential Paper Feeding Check Pattern for the Paper Ejection Roller ...
Page 229: ...7 18 Confidential Vertical Alignment Check Patterns 600DPI 1200DPI ...
Page 232: ...7 21 Confidential Margin Check Pattern ...
Page 241: ...Confidential CHAPTER 8 CLEANING ...
Page 245: ...Confidential CHAPTER 9 MAINTENANCE MODE ...
Page 253: ...9 6 Confidential Scanning Compensation Data List a b c d e f i ...
Page 256: ...9 9 Confidential Test Pattern ...
Page 261: ...9 14 Confidential Configuration List ...
Page 269: ...9 22 Confidential Paper Feeding Check Pattern for the Paper Feed Roller ...
Page 270: ...9 23 Confidential Paper Feeding Check Pattern for the Paper Ejection Roller ...
Page 275: ...9 28 Confidential Vertical Alignment Check Patterns 600DPI 1200DPI ...
Page 278: ...9 31 Confidential Margin Check Pattern ...
Page 381: ...Confidential Power supply PCB U S A and Canadian models ...
Page 382: ...Confidential Power supply PCB European Asian and Oceanian models ...
Page 383: ...Confidential January 07 SM FAX054 8CAA01 2 Printed in Japan ...