February 2013
3-76
ColorQube® 9303 Family
IQ 25
Image Quality
IQ 25 Random Spots RAP
Use this RAP when the output has random spots. Refer to Figure 1.
Random spots are usually ink debris from the stripper blade, abatement plenum or printheads.
Spots can appear on the image if the cleaning unit fails to thoroughly clean the drum. Large
spots of primary colours can be caused by a faulty printhead.
Ensure IQ 1 Image Quality Entry RAP is performed before starting this RAP.
Figure 1 Random spots from incomplete drum cleaning
Initial Actions
WARNING
Ensure that the electricity to the machine is switched off while performing tasks that do
not need electricity. Refer to GP 14. Disconnect the power cord. Electricity can cause
death or injury. Moving parts can cause injury.
WARNING
Take care during this procedure. The stripper blade is very sharp and can cause injury.
WARNING
Do not clean the stripper blade. The stripper blade is very sharp and can cause injury. If
the stripper blade is dirty a new blade must be installed.
WARNING
Take care during this procedure. Sharp edges may be present that can cause injury.
CAUTION
Use care when moving the marking unit into the service position when hot. Ink can spill from
the ink reservoir located at the back of the unit if opened with too much force. Cross-colour ink
contamination could also occur.
CAUTION
Do not touch the exposed face of the printheads. Surface contamination or minor damage can
easily make the printhead unusable.
• Press the Machine Status button on the keypad, select the Fault tab on the UI, then Cur-
rent Messages. If the message ‘Cleaning unit life extended. Image quality may be
impacted’ is displayed, install a new cleaning unit, PL 94.10 Item 21.
• Check the media. If low grade or recycled media is found, suggest using a better grade of
media. Defects in the media may appear as spots of ink, Figure 2.
Procedure
Print TP 14 Drum Stripper Blade Test Print. The stripper blade releases between the 35
mm and the 50 mm mark.
YN
Install a new stripper blade solenoid, PL 10.10 Item 3.
Perform dC969 Clean Ink Smears. Print three copies of TP 4 Yellow Solid Fill Test pages
(TP 2 to TP 10).
The test pages are good.
YN
Install a new stripper blade assembly, PL 10.12 Item 3.
Perform SCP 5 Final Actions.
Perform the self test routine in dC959 Cleaning Unit Exerciser. The cleaning unit self test is
successful.
YN
Install a new cleaning unit, PL 94.10 Item 21.
Remove the cleaning unit PL 94.10 Item 21. Check the metering blade and roller area for
paper debris.
The metering blade and roller area are free of paper debris.
YN
Remove the paper debris from the metering blade and roller area. Do not wipe the meter-
ing blade.
A
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