2L6/2N6/2N5/2N4
1-4-204
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.1-4-206.
(Defects caused by a reading error that occurs at the original (glass) LED lamp to CCD (DP: CIS).)
Isolate the problem at the location that the originals are scanned.
a. Single side DP (read by Main CCD)
b. On the contact glass (read by Main CCD)
c. Back side DP (For DPs mounted with CIS)
2. Main unit as the cause of defect:
Verify whether the problem is caused with mono or full color development (defects seen over the entire
image).
(1)Main unit as the cause of defect (Mono color) If the defect of image occurs with mono color development of
a particular color, refer to P. 1-4-255.
(A defect of image forming occurs from the rendering process that involves charging, drum, LSU,
developer, and primary transferring.)
(2)Main unit as the cause of defect (Image entirety) If the defect of image occurs with full color development,
refer to P. 1-4-273.
(A defect of transferring and paper conveyance occurs from the rendering process that involves the interme-
diate belt, secondary transfer roller, fuser, ejection.)
<Flow of image data>
Copying :
Sending :
LED lump
CCD
ISC
PWB
Main
PWB
(DDR
memory)
HDD
Engine
PWB
(DDR
memory)
LSU
relay
PWB
LSU
CIS
(DP:back)
DP relay
PWB
LED lump
CCD
ISC
PWB
Main
PWB
(DDR
memory)
HDD
Main
PWB
(DDR
memory)
PC
CIS
(DP:back)
DP relay
PWB
Summary of Contents for TASKalfa 3051ci
Page 5: ...2L6 2N6 2N5 2N4 1 4 4 Machine Option2 Figure 1 4 4 Paper jam location Matchine Option2 ...
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