3-16
Confidential
Damping
Without damping, ink pressure fluctuations directly affect the size of ink-jet head droplets,
risking lower print quality.
Each damper assembly has two chambers. The one on the right in the illustration below has a
loose film across its top and serves as a damper. The film immediately flexes in and out in
response to falls and rises in pressure, adjusting the chamber volume to counteract pressure
fluctuations in the ink supply tubes.
Air buffering
Liquid ink contains trace amounts of air. These molecules coalesce into air bubbles as the
piezoelectric ceramic actuators vary the pressure on the ink in the ink-jet head channel. (See the
illustration on
.) Removing as many of these bubbles as possible before the ink
reaches the ink-jet head is essential to maintaining proper print quality. The above illustration
shows how the damper assemblies provide air buffers, the chambers on the left, for
consolidating these air bubbles away from the ink-jet head and vent flow paths for purging them
at regular scheduled intervals.
Film
(DamperFunc)
Left chamber
This loose film flexes in and out in
response to changes in ink pressure.
Summary of Contents for MFC-J220
Page 8: ...vi Confidential SAFETY PRECAUTIONS Symbols used in the documentation ...
Page 9: ...vii Confidential ...
Page 10: ...viii Confidential ...
Page 11: ...ix Confidential ...
Page 12: ...x Confidential ...
Page 13: ...xi Confidential ...
Page 14: ...xii Confidential ...
Page 15: ...xiii Confidential ...
Page 16: ...Confidential CHAPTER 1 PARTS NAMES AND FUNCTIONS ...
Page 20: ...1 3 Confidential 1 2 CONTROL PANEL DCP375CW ...
Page 21: ...1 4 Confidential ...
Page 22: ...1 5 Confidential DCP395CN ...
Page 23: ...1 6 Confidential ...
Page 24: ...1 7 Confidential MFC255CW 295CN ...
Page 25: ...1 8 Confidential ...
Page 26: ...1 9 Confidential MFC495CW ...
Page 27: ...1 10 Confidential ...
Page 28: ...1 11 Confidential MFC795CW ...
Page 29: ...1 12 Confidential ...
Page 30: ...1 13 Confidential DCPJ125 J315W J515W J715W 8 7 6 5 1 2 4 3 ...
Page 31: ...1 14 Confidential ...
Page 32: ...1 15 Confidential MFCJ220 J265W J270W J410 J410W J415W J615W J630W 6 7 8 5 2 4 3 1 ...
Page 33: ...1 16 Confidential Mono Start Colour Start ...
Page 34: ...1 17 Confidential DCPJ140W 6 7 8 5 2 4 3 1 ...
Page 37: ...Confidential CHAPTER 2 SPECIFICATIONS ...
Page 39: ...Confidential 2 12 PAPER 2 42 2 12 1 Paper Specifications 2 42 2 12 2 Printable Area 2 44 ...
Page 84: ...Confidential CHAPTER 3 THEORY OF OPERATION ...
Page 130: ...Confidential CHAPTER 4 ERROR INDICATION AND TROUBLESHOOTING ...
Page 135: ...4 3 Confidential For MFC only Replace Ink ...
Page 187: ...Confidential CHAPTER 5 HANDLING DATA HELD IN THE MACHINE PRIOR TO REPAIR ...
Page 191: ...Confidential CHAPTER 6 DISASSEMBLY REASSEMBLY AND LUBRICATION ...
Page 193: ...Confidential 6 2 LUBRICATION 6 103 ...
Page 302: ...Confidential CHAPTER 7 ADJUSTMENTS AND UPDATING OF SETTINGS REQUIRED AFTER PARTS REPLACEMENT ...
Page 309: ...7 5 Confidential 8 Alert warning message of WHQL appears Click Continue Anyway to proceed ...
Page 318: ...7 14 Confidential Head Positioning Test Pattern ...
Page 325: ...7 21 Confidential Vertical Alignment Check Pattern A 1 2 ...
Page 326: ...7 22 Confidential Vertical Alignment Check Pattern A 2 2 ...
Page 327: ...7 23 Confidential Vertical Alignment Check Pattern B ...
Page 331: ...7 27 Confidential Left Right and Bottom Margins Check Pattern ...
Page 342: ...7 38 Confidential ADF Copy Chart A B C D ...
Page 345: ...Confidential CHAPTER 8 CLEANING ...
Page 349: ...8 3 Confidential Maintenance unit Head wiper Head cap unit cleaning_duplex Rubycel stick ...
Page 350: ...Confidential CHAPTER 9 MAINTENANCE MODE ...
Page 359: ...9 7 Confidential Scanning Compensation Data List Models except DCPJ140W DCPJ140W ...
Page 362: ...9 10 Confidential Test Pattern ...
Page 367: ...9 15 Confidential Configuration List ...
Page 372: ...9 20 Confidential MFC255CW 295CN MFC495CW MFC795CW DCPJ125 J315W J515W J715W Key Entry Order ...
Page 373: ...9 21 Confidential DCPJ140W MFCJ220 J265W J270W J410 J410W J415W J615W J630W Key Entry Order ...
Page 397: ...9 45 Confidential Vertical Alignment Check Pattern A 1 2 ...
Page 398: ...9 46 Confidential Vertical Alignment Check Pattern A 2 2 ...
Page 399: ...9 47 Confidential Vertical Alignment Check Pattern B ...
Page 403: ...9 51 Confidential Left Right and Bottom Margins Check Pattern ...
Page 439: ...App 2 3 Confidential 8 Alert warning message of WHQL appears Click Continue Anyway to proceed ...
Page 521: ...App 5 3 Confidential DCPJ515W ...
Page 522: ...App 5 4 Confidential DCPJ715W MFCJ615W J630W ...
Page 523: ...App 5 5 Confidential DCPJ125 J315W MFCJ220 J265W J270W J410 J410W J415W ...
Page 524: ...App 5 6 Confidential DCPJ140W ...
Page 534: ...App 6 9 Confidential B Power supply PCB 200 V series ...