06/2014
3-11
WC 5022/5024
3.1.4 Image Quality Troubleshooting
Image Quality Troubleshooting
Version 1.0
IQ13 Spots RAP
Toner spots and blank areas are spread irregularly over the whole page.
Procedure
Check for contamination on the Platen Glass. The Platen Glass is clean.
YN
Clean any contamination on the Platen. If it is very dirty, replace the Top Cover (PL 1.2)
(REP 1.2.1).
Remove the Drum Cartridge (PL 8.1) (REP 8.1.1) and reinstall it. Turn the power OFF then ON
and print. The problem reoccurs.
YN
End
Install the new Drum Cartridge (PL 8.1) (REP 8.1.1) securely. Turn the power OFF then ON
and print. The problem reoccurs.
YN
End
Check the surface of the BTR for contamination and distortion. The surface of the BTR is
clean and there is no distortion.
YN
Clean the BTR. If there is distortion, replace the BTR Roll (PL 6.1) (REP 4.1.1).
Check for contamination in the paper transport path. The paper transport path is clean.
YN
Clean away the contamination.
Remove the Fusing Unit (PL 7.1) (REP 7.1.1) and check the surface of the Heat Roll for con-
tamination. The surface of the Heat Roll is clean.
YN
Clean away the contamination. If there is difficulty in removing the contamination, replace
the Fusing Unit (PL 7.1) (REP 7.1.1).
Check the paper type. Paper used is within specifications.
YN
Use paper within specifications.
Use paper from a freshly opened packet. The problem reoccurs.
YN
End
Replace the ESS/MCU PWB (PL 18.3) (REP 18.3.2).
IQ14 Black Prints RAP
Paper is printed completely black.
Procedure
Check the operating parts of the IIT Carriage for foreign substances and distortion. No distor-
tion or foreign substances are found in the operating parts of the carriage.
YN
Remove the foreign substances. If the IIIT Carriage (PL 1.3) (REP 1.3.2), IIT Carriage
Belt (PL 1.3) (REP 1.3.2), etc. is deformed, replace it.
Remove the Drum Cartridge (PL 8.1) (REP 8.1.1) and reinstall it. Turn the power OFF then ON
and print. The problem reoccurs.
YN
End
Install the new Drum Cartridge (PL 8.1) (REP 8.1.1) securely. Turn the power OFF then ON
and print. The problem reoccurs.
YN
End
Remove the HVPS (PL 18.3) (REP 18.1.2) and reinstall it. Turn the power OFF then ON and
print. The problem reoccurs.
YN
End
Check the connection of the HVPS P/J500 and ESS/MCU PWB P/J402 connectors. The con-
nectors are connected correctly.
YN
Connect the connector cable securely.
Check the connection between J500-7 and J402-8 for open circuit and short circuit. The
connection between J500-7 and J402-8 is conducting normally with no open circuit and
no short circuit.
YN
Repair the open circuit or short circuit.
Check the connection between the ROS Assembly (PL 2.1) (REP 2.1.1) and the ESS/MCU
PWB (PL 18.3) (REP 18.3.2) for open circuit and short circuit. The connections between the
ROS J140 and the ESS/MCU PWB J410, as well as between the ROS J130 and the ESS/
MCU J410 are conducting normally with no open circuits and no short circuits.
YN
Repair the open circuit or short circuit.
Replace the ROS Assembly (PL 2.1) (REP 2.1.1), followed by the HVPS (PL 18.3) (REP
18.1.2) and the ESS/MCU PWB (PL 18.3) (REP 18.3.2).
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