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4-42
Confidential
4.2.5 Problems Encountered Frequently in the Past
This section lists the four problems most frequently encountered during on-site service in the
past.
- Paper jams
- Error message "MACHINE ERROR 4F"
- Ink-related problems
- Auto document feeder (ADF) failure
[ 1 ] Paper jams
A paper jam may occur not only due to machine malfunction but also to the user's actions.
NOTE:
In some cases, foreign material that has found its way into the machine without the user
realizing can be the cause of a paper jam. Instruct the user to place nothing on top of the
machine that might fall into it.
NOTE:
When removing foreign materials from the machine, take special care not to
contaminate or scratch the CR encoder strip. If the encoder strip is contaminated or scratched,
replace it. (Refer to
.)
NOTE:
After removing jammed paper from the machine, be sure to check that no fragment of
paper remains in the machine.
Problems due to the user's actions
Problems due to machine malfunction
Check
Possible causes
Problems that may result
Recording paper
Paper not suited to use with the machine
was used.
Paper with labels attached, for
example, may leave labels inside
the machine.
For foreign materials
Fragments of paper that were left behind
when previous paper jams occurred.
Foreign materials such as tacks have
found their way into the machine.
Foreign materials can hinder the
paper feed.
Check
Possible causes
Problems that may result
Star wheels on star
wheel support
Star wheels became dislocated when
paper jam occurred.
Dislocated star wheels can hinder
paper feed.
Sensors and actuators
Any sensor(s) not working.
If a sensor does not turn on, the
related roller(s) will not rotate.
Bank ASSY
The bank ASSY is deformed.
A deformed section on the bank
ASSY can cause double-feeding.
CR encoder strip
The CR encoder strip is stained.
A stained CR encoder strip can
cause a carriage drive error during
printing that will stop the printing
operation.
Bank ASSY
Paper tray
Summary of Contents for MFC 5490CN - Color Inkjet - All-in-One
Page 7: ...v Confidential SAFETY PRECAUTIONS ...
Page 8: ...vi Confidential ...
Page 9: ...vii Confidential ...
Page 10: ...viii Confidential ...
Page 11: ...ix Confidential ...
Page 12: ...x Confidential ...
Page 13: ...xi Confidential ...
Page 14: ...Confidential CHAPTER 1 PARTS NAMES AND FUNCTIONS ...
Page 18: ...1 3 Confidential 1 2 CONTROL PANEL 11 10 8 9 7 1 2 3 4 5 6 ...
Page 19: ...1 4 Confidential ...
Page 21: ...Confidential CHAPTER 2 SPECIFICATIONS ...
Page 28: ...2 6 Confidential 2 2 SPECIFICATIONS LIST ...
Page 29: ...2 7 Confidential ...
Page 30: ...2 8 Confidential ...
Page 31: ...2 9 Confidential ...
Page 32: ...2 10 Confidential ...
Page 33: ...2 11 Confidential ...
Page 34: ...2 12 Confidential ...
Page 35: ...2 13 Confidential ...
Page 36: ...Confidential CHAPTER 3 THEORY OF OPERATION ...
Page 88: ...Confidential CHAPTER 4 ERROR INDICATION AND TROUBLESHOOTING ...
Page 142: ...Confidential CHAPTER 5 HANDLING DATA HELD IN THE MACHINE PRIOR TO REPAIR ...
Page 149: ...Confidential CHAPTER 6 DISASSEMBLY REASSEMBLY AND LUBRICATION ...
Page 240: ...Confidential CHAPTER 7 ADJUSTMENTS AND UPDATING OF SETTINGS REQUIRED AFTER PARTS REPLACEMENT ...
Page 246: ...7 4 Confidential 8 Alert warning message of WHQL appears Click Continue Anyway to proceed ...
Page 254: ...7 12 Confidential Head Positioning Test Pattern ...
Page 258: ...7 16 Confidential Paper Feeding Check Pattern for the Paper Feed Roller ...
Page 259: ...7 17 Confidential Paper Feeding Check Pattern for the Paper Ejection Roller ...
Page 261: ...7 19 Confidential Vertical Alignment Check Patterns 2 2 ...
Page 265: ...7 23 Confidential Left and Right Margin Check Pattern ...
Page 266: ...7 24 Confidential Bottom Margin Check Pattern ...
Page 276: ...7 34 Confidential A B C D ...
Page 279: ...Confidential CHAPTER 8 CLEANING ...
Page 283: ...Confidential CHAPTER 9 MAINTENANCE MODE ...
Page 291: ...9 6 Confidential Scanning Compensation Data List ...
Page 294: ...9 9 Confidential Test Pattern ...
Page 299: ...9 14 Confidential Configuration List ...
Page 314: ...9 29 Confidential Paper Feeding Check Pattern for the Paper Feed Roller ...
Page 315: ...9 30 Confidential Paper Feeding Check Pattern for the Paper Ejection Roller ...
Page 320: ...9 35 Confidential Vertical Alignment Check Patterns 1 2 ...
Page 321: ...9 36 Confidential Vertical Alignment Check Patterns 2 2 ...
Page 325: ...9 40 Confidential Left and Right Margin Check Pattern ...
Page 326: ...9 41 Confidential Bottom Margin Check Pattern ...
Page 356: ...App 2 3 Confidential 8 Alert warning message of WHQL appears Click Continue Anyway to proceed ...
Page 436: ...App 6 4 Confidential B Power supply PCB 100 V series ...
Page 437: ...App 6 5 Confidential B Power supply PCB 200 V series ...