d-Color MF4003/MF3303
L TROUBLESHOOTING > 16. IMAGE QUALITY PROBLEM
L-131
Step
Section
Check item
Result
Action
6
2nd transfer section
There is a positive contact between the application
terminals of the 2nd transfer and the connection
terminals (T2) and ground terminal of the high voltage
unit.
NO
Clean or correct the terminal.
7
Fusing unit
There is dirty or foreign matter on paper path of fusing
unit.
YES
Clean. (Disassembling the fusing
unit is prohibited.)
8
Fusing unit
Scratches on roller, pad, and belt in fusing unit.
YES
NO
• Replace the high voltage unit.
•
Scanner troubleshooting procedure
Step
Section
Check item
Result
Action
1
Original
Original is damaged or dirty.
YES
Change the original.
2
When original glass is
being used
A fault occurs in the image read through the original
glass.
YES
Go to step 5.
3
When DF is being used:
1st side
A fault occurs in the image read from the 1st side while
DF is being used.
YES
Go to step 10.
4
When DF is being used:
2nd side
A fault occurs in the image read from the 2nd side while
DF is being used.
YES
Go to step 13.
Main body side_original glass
5
DF side_ Original pad
Original pad of DF is dirty.
YES
Clean.
6
Original glass
Original glass is dirty.
YES
Clean.
7
End face of original is
reproduced as a line
Select [Service Mode] -> [Machine] -> [Scan Area] ->
[Scanner Image Side Edge] and make the necessary
adjustment, and the image trouble is eliminated.
NO
Go to the next step.
8
Line occurring due to
faulty shading
Select [Service Mode] -> [Machine] -> [Scan Area] ->
[Image Position: Leading Edge] and make the necessary
adjustment, and the image trouble is eliminated.
NO
Go to the next step.
9
Parts along scanning path Light guide or lens array is dirty.
YES
Clean.
NO
Main body side_DF original reading section
10
Main body side_reading
section
Original reading glass of main body is dirty.
YES
Clean.
11
Service Mode -> Read
Pos Adj
Select [Service Mode] -> [ADF] -> [Read Pos Adj] and
the image trouble is eliminated.
NO
Go to the next step.
12
Parts along scanning path Light guide or lens array is dirty.
YES
Clean.
NO
DF side_original reading section
13
CIS glass cleaning
CIS glass is dirty.
YES
Clean.
14
CIS reading section
CIS reading section is dirty.
YES
Clean.
15
When DF is being used:
2nd side
Shading correction surface of DF is dirty.
YES
Clean.
NO
Replace the DF CIS module assy.
16.3.3 White line 2, White band 2, Color line 2, Color band 2
Typical faulty images
The arrow in the exemplary image troubles indicates the paper feeding direction.
[1]
[2]
[3]
[4]
[1]
White line
[2]
White band
[3]
Color line
[4]
Color band
Initial troubleshooting procedure
Step
Section
Check item
Result
Action
1
Paper Setting
The paper to be used for printing does not match the
paper type and size of paper setting selected on the
machine.
YES
Make the paper setting again on
the machine.
Y119930-3
Service Manual
Summary of Contents for d-Color MF 4003
Page 1: ...Multifunction Digital Copier d Color MF4003 MF3303 Service Manual Version 2 0 Code Y119930 3 ...
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