3-17
Confidential
[ Tip: What's so bad about air bubble growth? ]
Pressure fluctuations do not affect the volume of a liquid (ink), but Boyle's Law says that the
volume of a gas (air) varies with the pressure on it. The main issue with air bubbles in the ink flow
path is their damping effect, absorbing the pressure from the piezoelectric ceramic actuators and
thus degrading ink-jet performance.
Bubble (High pressure)
Piezoelectric element
Pressure chamber
(Channel)
Bubble (Without pressure)
(Head_bubble)
The above illustration shows an example of an extremely large air bubble reaching the head nozzle
from the channel ink flow path; the dotted line, the changes resulting from applying a voltage to the
laminated electrode, expanding the piezoelectric ceramic actuator. Note how contraction of the air
bubble absorbs the pressure from the piezoelectric ceramic actuator, preventing ink ejection.
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 ...