Troubleshooting for Image Quality Problems
SM
6-149
D0CA/D0C9/D0C8/D0CB
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6.12.14 MISSING PARTS OF IMAGES
Symptom
Possible cause
Necessary actions
Some parts of images are
missing.
Defective PCDU
Replace the PCDU.
Defective image transfer belt
unit
Replace the image transfer belt
unit.
Defective paper transfer
roller
Replace the paper transfer
roller.
Defective fusing unit
Replace the fusing unit.
6.12.15 DIRTY BACKGROUND
Symptom
Possible cause Necessary actions
Backgrounds of one CMYK color are too dense.
Defective
PCDU
Replace the
PCDU.
Backgrounds of more than one CMYK color are too
dense.
Defective HVPS Replace the HVPS.
6.12.16 PARTIAL CMY COLOR DOTS
Symptom
Possible cause
Necessary actions
Unexpected dots of the same color appear
at irregular intervals.
Defective PCDU
Replace the PCDU.
Defective image
transfer belt unit
Replace the image
transfer belt unit.
Defective fusing unit
Replace the fusing unit.
6.12.17 DARK IRREGULAR STREAKS ON PRINTS
Symptom
Possible cause
Necessary actions
Unexpected streaks appear at irregular
intervals.
Defective image
transfer belt
Replace the image transfer
belt unit.
6.12.18 CMY COLOR IRREGULAR STREAKS
Symptom
Possible cause
Necessary actions
Unexpected streaks of the same color
appear at irregular intervals.
Defective PCDU
Replace the PCDU.
Defective image
transfer belt unit
Replace the image
transfer belt unit.
6.12.19 GHOSTING
Symptom
Possible cause
Necessary actions
The same or similar image appears two or more times. Defective PCDU Replace the PCDU.
Summary of Contents for D0C8
Page 1: ...D0CA D0C9 D0C8 D0CB SERVICE MANUAL Rev 08 26 2021...
Page 4: ......
Page 6: ......
Page 35: ...PRODUCT INFORMATION...
Page 36: ......
Page 44: ......
Page 45: ...INSTALLATION...
Page 46: ......
Page 222: ......
Page 223: ...PREVENTIVE MAINTENANCE...
Page 224: ......
Page 233: ...REPLACEMENT AND ADJUSTMENT...
Page 234: ......
Page 264: ...Special Tools D0CA D0C9 D0C8 D0CB 4 30 SM...
Page 276: ...Exterior Covers D0CA D0C9 D0C8 D0CB 4 42 SM 6 Remove the scanner inner cover A...
Page 442: ...Duplex D0CA D0C9 D0C8 D0CB 4 208 SM 3 Remove the right cover sensor SW2 A 1...
Page 452: ...Electrical Components D0CA D0C9 D0C8 D0CB 4 218 SM IM C300 series IM C400F...
Page 501: ...SYSTEM MAINTENANCE...
Page 502: ......
Page 578: ...Self Diagnostic Mode D0CA D0C9 D0C8 D0CB 6 4 SM...
Page 732: ...Troubleshooting for Other Problems D0CA D0C9 D0C8 D0CB 6 158 SM...
Page 742: ...Jam Detection D0CA D0C9 D0C8 D0CB 6 168 SM...
Page 746: ...Jam Detection D0CA D0C9 D0C8 D0CB 6 172 SM Sensor Layout...
Page 747: ...Jam Detection SM 6 173 D0CA D0C9 D0C8 D0CB Troubleshooting...
Page 750: ......
Page 751: ...DETAILED DESCRIPTIONS...
Page 752: ......
Page 754: ...Machine Overview D0CA D0C9 D0C8 D0CB 7 2 SM IM C400F...
Page 756: ...Machine Overview D0CA D0C9 D0C8 D0CB 7 4 SM 7 1 2 PAPER PATH IM C300 series...
Page 757: ...Machine Overview SM 7 5 D0CA D0C9 D0C8 D0CB Detailed Descriptions IM C400F...
Page 772: ...Machine Overview D0CA D0C9 D0C8 D0CB 7 20 SM Electrical Parts IM C300 series IM C400 series...
Page 797: ...Laser Unit SM 7 45 D0CA D0C9 D0C8 D0CB Detailed Descriptions...
Page 848: ...Duplex D0CA D0C9 D0C8 D0CB 7 96 SM 7 16 DUPLEX 7 16 1 OVERVIEW IM C300 series...
Page 849: ...Duplex SM 7 97 D0CA D0C9 D0C8 D0CB Detailed Descriptions IM C400F...
Page 854: ...Duplex D0CA D0C9 D0C8 D0CB 7 102 SM...
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Page 889: ...SMART OPERATION PANEL...
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Page 959: ...D0CA D0C9 D0C8 D0CB SERVICE MANUAL APPENDICES...
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Page 964: ......
Page 966: ......
Page 981: ...APPENDICES PREVENTIVE MAINTENANCE TABLES...
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Page 991: ...APPENDICES SP MODE TABLES...
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Page 1454: ......
Page 1455: ...APPENDICES SOFTWARE CONFIGURATION...
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Page 1469: ...Scanner Features SM Appendices 4 13 D0CA D0C9 D0C8 D0CB Appendices Software Configuration...
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Page 1475: ......
Page 1552: ...Bit Switches 3 SM 77 D0CK...
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Page 1614: ...Rear Cover SM 9 D3GQ 2 2 REAR COVER 1 Remove the rear cover A...
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