Olivetti d-Color MF4003 Service Manual page 535

d-Color MF4003/MF3303
Step Section
4-color troubleshooting procedure
Step Section
1 Transfer belt unit
2 2nd transfer section
3 Service Mode -> Max
Image Density Adj
4 Service Mode -> Initialize
+ Image Stabilization
Scanner troubleshooting procedure
Step Section
1 Original Type
2 When original glass is
being used
3 Parts along scanning path Light guide or lens array is dirty.
4 When DF is being used:
1st side
5 When DF is being used:
2nd side
16.3.7 Gradation reproduction failure
Typical faulty images
The arrow in the exemplary image troubles indicates the paper feeding direction.
Initial troubleshooting procedure
Step Section
1 Malfunction code
2 Paper Setting
3 Image check
Y119930-3
Check item for the faulty color
Check item
There is a positive contact between the transfer belt
application terminals and the high voltage unit
connection terminals (T1).
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.
Select [Service Mode] -> [Imaging Process Adjustment] -
> [Max Image Density Adj] and make the necessary
adjustment, and the image trouble is eliminated.
Select [Service Mode] -> [Imaging Process Adjustment] -
> [Stabilizer] -> [Initialize + Image Stabilization] and
[Gradation Adjust], and the image trouble is eliminated.
Check item
Select [Copy] -> [Original Type] and change the setting,
and the image trouble is eliminated.
Original glass or original pad is dirty.
Original reading glass is dirty.
• Shading correction surface of DF is dirty.
• CIS glass is dirty.
Check item
The maintenance call mark is displayed on the panel.
The paper to be used for printing does not match the
paper type and size of paper setting selected on the
machine.
• Select [Service Mode] -> [Test Mode] -> [Gradation
Pattern].
Select "SINGLE", "HYPER", "Error diffusion", "1-
Sided", "CMYK", "Full Bleed", and "12 gradations",
and load tray 2 with A4 paper. Press the start key.
This runs a print cycle for C, M, Y, and K in that
order.
• Check the image after printing to determine which
color causes the abnormal image.
L-137
L TROUBLESHOOTING > 16. IMAGE QUALITY PROBLEM
Result
•
•
•
Result
NO Clean or correct the terminal.
NO Clean or correct the terminal.
NO Go to the next step.
YES Readjust.
NO •
•
•
Result
YES Correct the setting.
YES Clean.
YES Clean.
YES Clean.
NO Replace the CIS module.
YES Clean.
NO Replace the DF CIS module assy.
Result
YES Perform the relevant
troubleshooting procedure
corresponding to the malfunction
code.
YES Make the paper setting again on
the machine.
YES Go to engine troubleshooting
procedure.
NO Go to scanner troubleshooting
procedure.
Action for the faulty color
Replace the PH unit.
Replace the high voltage unit.
Replace the base board.
Action
Replace the transfer belt unit.
Replace the high voltage unit.
Replace the base board.
Action
Action
Service Manual