Olivetti d-Color MF4003 Service Manual page 528

d-Color MF4003/MF3303
Step Section
1-color troubleshooting procedure
Step Section
1 Service Mode -> Table
Number
2 Write section
3 Charging section
4 Photoconductor section
5 Developing section
6 Photoconductor section
7 Photoconductor section
8 Photoconductor section
9 1st transfer section
10 1st transfer section
11 Developing section
4-color troubleshooting procedure
Step Section
1 Paper path
2 Transfer belt unit
3 Transfer belt unit
4 Transfer belt unit
5 2nd transfer section
Service Manual
Check item
Density, 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.
Check item for the faulty color
Select [Service Mode] -> [State Confirmation] -> [Table
Number]. The measured value is close to the standard
value.
• Developing bias: Vdc-C, Vdc-M, Vdc-Y, Vdc-K:
close to the standard value of -800 to 0
• Grid voltage: Vg-C, Vg-M, Vg-Y, Vg-K: close to the
standard value of -1600 to 0
Sharp white line or colored line is blurry.
Foreign matter on charging roller.
There is a positive contact between the electrostatic
charger application terminals and the high voltage unit
connection terminals (Y: C4, M: C3, C: C2, K: C1).
There is a positive contact between the developing bias
application terminals and the high voltage unit
connection terminals (Y: B4; M: B3; C: B2; K: B1).
Scratches on photoconductor.
Toner line or dirt on photoconductor. (improper cleaning)
Faint lines evident on the entire surface as if the surface
were brushed off.
There is a positive contact between the transfer belt
application terminals and the high voltage unit
connection terminals (T1).
Scratches or dirt on 1st transfer roller.
Toner bristles not even on the developing roller, resulting
in a line or band.
Check item
There is dirty or foreign matter on paper path.
Lines that can be removed by cleaning are evident on
the transfer belt. (improper cleaning)
Dirt, scratches, or foreign matter on the transfer belt.
There is a positive contact between the transfer belt
application terminals and the high voltage unit
connection terminals (T1).
Dirt or foreign matter on the 2nd transfer roller.
L-130
L TROUBLESHOOTING > 16. IMAGE QUALITY PROBLEM
Result
None Go to scanner troubleshooting
procedure.
Result
NO • Check the high voltage unit
•
YES Clean the PH window.
YES Lightly wipe the surface clean of
foreign matter using hydro-wipe
(65AA-99##).
Note: Do not apply a strong force
to the surface of the charging
roller, as doing so can damage the
surface.
NO Clean or correct the terminal.
NO Clean or correct the terminal.
YES • Clean.
•
YES Replace the imaging unit.
YES • Select [Service Mode] ->
•
NO Clean or correct the terminal.
YES • Clean.
•
YES Replace the imaging unit.
NO Replace the PH unit.
Result
YES Check or clean the paper path
including the duplex section.
YES • Check or clean the cleaning
•
YES • Clean.
•
NO Clean or correct the terminal.
YES • Remove the foreign matter.
•
Action
Action for the faulty color
and the imaging unit for wiring
and connection.
Replace the high voltage unit.
Replace the imaging unit.
[Counter] -> [Life] and check
the counter value of the
Imaging Unit.
Replace the imaging unit
having the greatest counter
value with a new one. (Not
the imaging unit of the color
that has developed the lines,
but the imaging unit having
the greatest counter value)
Replace the transfer belt unit.
Action
blade.
Replace the transfer belt unit.
Replace the transfer belt unit.
Replace the transfer roller
unit.
Y119930-3