2NC/2NF/2NG/2NN/3P7/3P8/3P9
1-4-36
1-4-4 Image formation problems
Isolate the component an image defect has occurred from.
<A guide to isolate the component of the cause.>
Run U089 to print a test page and check whether an image defect happens.
YES: Main unit as the cause of defect
NO: Scanner as the cause of defect
Perform enlarged or reduced copying and verify if the defective images are enlarged or reduced, accordingly.
YES: Scanner as the cause of defect
1. Scanner as the cause of defect:
If the defect occurs with copying or sending, refer to P.1-4-37.
(Defects caused by a reading error that occurs at the original (glass) LED lamp to CIS.)
Isolate the problem at the location that the originals are scanned.
a. DP (read by CIS)
b. On the contact glass (read by CIS)
2. Main unit as the cause of defect: refer to P. 1-4-37.
(A defect of image forming occurs from the rendering process that involves charging, drum, LSU,
developer, and primary transferring.)
<Flow of image data>
CIS
Main/Engine PWB
APC PWB
(LSU)
CIS
PC
Main/Engine PWB
Printer driver
Main/Engine PWB
APC PWB
(LSU)
Copying :
Sending :
Printing data from PC :
Summary of Contents for DP-480
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Page 18: ...2NC 2NF 2NG 2NN 3P7 3P8 3P9 This page is intentionally left blank ...
Page 54: ...2NC 2NF 2NG 2NN 3P7 3P8 3P9 1 2 24 This page is intentionally left blank ...
Page 172: ...2NC 2NF 2NG 2NN 3P7 3P8 3P9 1 3 118 This page is intentionally left blank ...
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Page 455: ...Installation Guide DP 480 Document processor Installation Guide ...
Page 458: ...2 3 4 5 6 A ...
Page 459: ...3 7 8 9 B C C ...
Page 460: ...4 10 ...
Page 473: ...PF 480 300 sheet Paper feeder Installation Guide ...
Page 476: ...2 5 6 4 3 B M3x8 B M3x8 B M3x8 B M3x8 1 2 ...
Page 477: ...3 9 10 8 7 1 2 ...
Page 478: ...4 13 12 11 1 2 C ...
Page 479: ...5 15 14 E D D E D D E D D E D D ...
Page 482: ...DU 480 duplex unit Installation Guide ...
Page 484: ...1 2 3 1 A B M3x8 ...
Page 485: ...2 6 7 5 4 A A B M3x8 ...
Page 489: ...IB 33 Network interface kit Installation Guide ...
Page 490: ...2 3 1 IB 33 2013 7 303PB56710 01 A B ...
Page 491: ...6 7 5 4 2013 7 303PB56710 01 B YC2007 A ...
Page 492: ...FAX System X Installation Guide ...
Page 495: ...2 5 4 3 2 B M3x8 A YC 2003 ...
Page 496: ...3 8 9 7 6 C G G 8 9 7 6 C ...
Page 497: ...4 11 10 12 13 D D E ...
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