08/2012
3-6
WorkCentre 5021/5019
IQ3, IQ4
Initial Issue
Image Quality
IQ3 Low Image Density RAP
Overall low density of images.
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).
Check the drum ground contact point for contamination and distortion. The drum ground
contact point is clean and there is no distortion.
YN
Clean the drum ground contact point. Correct the distortion.
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
Enter the Diag Mode and set '30' into Chain-Link 752-350. Then, set '10' into Chain-Link 752-
230. Exit from the Diag Mode and make a printout.
If the problem reoccurs, enter the Diag Mode again, set '20' into Chain-Link 752-230, and
make another printout. (The maximum value that can be set for 752-230 is '30').
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
Print a page that is entirely black. During the print cycle, turn OFF the power after the feeding
sound is heard. (i.e. forcing to stop the transfer in mid-progress). Check the surface of the
Drum. There is a considerable amount of toner left on the surface of the drum.
YN
Replace the ESS/MCU PWB (PL 18.1) (REP 18.1.1).
Replace the BTR Roll (PL 6.1) (REP 4.1.1), followed by the HVPS (PL 18.1) (REP 18.1.2) and
the ESS/MCU PWB (PL 18.1) (REP 18.1.1).
IQ4 Wrinkled Image RAP
The printed paper is creased, folded or torn.
Procedure
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
Remove the Fusing Unit (PL 7.1) (REP 7.1.1) and reinstall it. Turn the power OFF then ON and
print. The problem reoccurs.
YN
End
Check for foreign substances and distortion in the paper transport path. No distortion or for-
eign substances are found in the paper transport path.
YN
Remove the foreign substances. Correct the distortion.
Replace the Fusing Unit (PL 7.1) (REP 7.1.1).
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